taxonID	type	description	language	source
A05D87DAFFF7B9790B6AFD884AADFDD6.taxon	etymology	Etymology: From Greek ψεῦΔΟ- (pseudo -), false, because the morphological resemblance to Botryotrichum murorum.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF7B9790B6AFD884AADFDD6.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), from soil near the lighthouse, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 25345, culture ex-type FMR 19917 = CBS 149965).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF7B9790B6AFD884AADFDD6.taxon	description	On oatmeal agar after 4 wk at 25 ° C: Mycelium scarce, mostly aerial, composed of septate, branching, smooth- and thin-walled, subhyaline to brown, 0.5 – 3 μm wide hyphae. Ascomata superficial, solitary to aggregate, smoke grey to olivaceous grey under reflected light, with greenish setae, ostiolate, neck absent, globose, subglobose, ovoid, or barrel-shaped, 30 – 105 × 20 – 100 μm (Fig. 2 E). Peridial wall translucent, greenish-brown to olivaceous brown, but opaque and nearly black around the ostiole (of up to 30 μm diam.) and medium brown at the base, 3 – 4 - layered, 7 – 12 μm thick, outer layer of textura intricata, inner layers composed of flattened, translucent polygonal cells of 5 – 15 μm diam. (Figs. 2 F, G); terminal hairs abundant around the ostiole, septate, straight, undulate and verrucose at the upper part (Fig. 2 H), pointed or circinate at the apex, greenish-brown to olivaceous grey, mostly up to three times longer than the ascomata diameter, 5 – 7.5 μm wide at the base, branching; lateral hairs straight, septate, greenish brown to olivaceous grey, up to 150 μm long, covered with cup-shaped ornamentations specially at the base, pointed or rounded at the tip (Fig. 2 E). Asci unitunicate, fasciculate, clavate to fusiform, spore-bearing part 36 – 51 × 13 – 20 μm, stalks 16 – 25 μm long, with 8 irregularly-arranged or biseriate ascospores, evanescent before ascospores become mature (Fig. 2 I). Ascospores unicellular, pale pinkish brown when young, brown but irregularly coloured (varying the intensity of colour) when mature, smooth-walled, but with slight irregularity in wall thickness, broadly fusiform, (12 –) 13 – 14 (– 15) × (7 –) 7.5 – 8 (– 8.5) × 7 – 8 μm, attenuated at both ends, with a germ pore at one end (Fig. 2 J). Asexual morph not seen. Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 8 – 9 mm diam., flat, circular, and expansive; margin filamentous, slightly- and irregularly undulate; surface yellowish grey (4 B 2) with black (6 F 3) ascomatal covered by almond green (28 E 3) terminal hairs and scarce white (4 A 1) aerial mycelium in the central area; soluble pigment absent; reverse nougat (5 D 3) and marble white (5 B 2) margins. Colonies on OA 30 – 31 mm diam., flat, circular, and expansive; margin entire and regular; surface golden blonde (4 C 4) with scarce white (3 A 1) erect aerial mycelium; soluble pigment absent; reverse greyish yellow (4 C 5). Colonies on CMA 18 – 19 mm diam., flat, circular, and expansive; margin filamentous and lobulated to irregular; surface without aerial mycelium camel (6 D 4) and yellowish white (3 A 2) margins; soluble pigment absent; reverse light brown (6 D 5). Colonies on MEA 14 – 15 mm diam., flat to slightly convex; margin entire and irregularly-lobulated; surface golden blonde (5 C 4) with floccose white (5 A 1) aerial mycelium and pale yellow (3 A 3) margins without aerial hyphae; yellow soluble pigment; reverse butter yellow (4 A 5) and yellowish white (3 A 2) margins. Culture iconography after 4 wk of incubation on PCA, OA, CMA and MEA (Fig. 2 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 5 ° C, 20 ° C and 35 ºC, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF7B9790B6AFD884AADFDD6.taxon	discussion	Notes: Botryotrichum pseudomurorum was placed in the fully-supported clade corresponding to the species of the genus Botryotrichum (B.), but in a separate branch flanked by Botryotrichum murorum CBS 163.52 and Botryotrichum spirotrichum CBS 211.55 (Fig. 1). Botryotrichum pseudomurorum differs from Botryotrichum murorum by the larger ascomata (160 – 320 × 150 – 270 μm in B. murorum), and the verrucose and longer terminal hairs (usually over four times longer than ascomata (up to 3 mm long). Additionally, B. pseudomurorum is distinguished by the production of a yellow soluble pigment on MEA, a characteristic not described for B. murorum (Corda 1837, Wang et al. 2016 a). While most Botryotrichum spp. have been reported from dung, air, wood or soil, they have not been specifically isolated from volcanic soils as the case of B. pseudomurorum (Wang et al. 2016 a, https: // wi. knaw. nl / fungal _ table, accessed on 21 February 2024). Like B. murorum, B. piluliferum, B. spirotrichum and B. verrucosum, which are mesophiles and have an optimal growing temperature of 20 − 30 ° C (Corda 1837, Pugh et al. 1964, Domsch et al. 1980, von Arx 1985, Asgari & Zare 2011), B. pseudomurorum exhibit a rapid growth between 5 and 35 ° C. However, B. verrucosum shows slow growing at 37 ° C, indicating a less thermotolerance than the former species (Pugh et al. 1964). Since B. pseudomurorum was isolated using the ToKaVa technique, suggesting the ability to use the keratin as source of nutrients by enzymatic digestion, further tests are required to confirm this assumption.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF5B97908D4FDC94CDCFE76.taxon	etymology	Etymology: From Latin a -, without, - sexus -, sex, and - alis, quality of, because the fungus lacks of sexual reproduction.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF5B97908D4FDC94CDCFE76.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 25249, culture ex-type FMR 19389 = CBS 149966).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF5B97908D4FDC94CDCFE76.taxon	description	On oatmeal agar after 4 wk at 25 ° C: Mycelium abundant, mostly aerial, septate, branching, smooth- and thin-walled hyphae when hyaline to subhyaline but granulose when pigmented, 1 – 4.5 μm wide, often coiled. Conidiogenous cells integrated to the hyphae, monoblastic, producing sessile conidia. Conidia 1 - celled, solitary, arising laterally on the hyphae, subhyaline to olivaceous brown, smooth- and thin-walled, obovoid, pyriform, broadly fusiform, subglobose, ellipsoidal, clavate or heart-shaped, 3 – 6 × 2.5 – 4 μm (Fig. 3 E, F). Sexual morph not observed. Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 35 – 36 mm diam., flat and circular; margin filamentous; surface natural (4 B 3) without aerial hyphae and with grey (3 E 1) radiate superficial mycelium; soluble pigment absent; reverse beige (4 B 3) and pale yellow in the centre (4 A 3). Colonies on OA 39 – 40 mm diam., flat, circular, and expansive; margin filamentous; surface beige (4 B 3) to golden (4 C 6) without aerial mycelium; soluble pigment absent; reverse uncoloured to golden (4 C 6). Colonies on CMA 22 – 23 mm diam., flat, circular, and expansive; margin filamentous; surface without aerial mycelium, champagne (4 B 4) in the central area with radiate soot brown (5 F 5) superficial mycelium and uncoloured margins; soluble pigment absent; reverse sepia (5 E 4). Colonies on MEA 34 – 35 mm diam., flat and circular; margin entire; surface with hair brown (5 F 2) superficial mycelium radiated, sparse floccose white (5 A 1) aerial mycelium just in the centre and natural (4 B 3) margins; soluble pigment absent; reverse like surface. Culture iconography after 4 wk of incubation on PCA, OA, CMA and MEA (Fig. 3 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 12 ° C, 35 ° C and 40 ° C, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF5B97908D4FDC94CDCFE76.taxon	discussion	Notes: Canariomyces asexualis was placed in a fully supported terminal clade together with Canariomyces microsporus CBS 276.74 and CBS 161.80, but in a separate branch as a distinct species (Fig. 1). Canariomyces asexualis lacks a sexual morph and differs morphologically from Canariomyces microsporus in the size and shape of conidia (Can. microsporus produces obovoid to clavate conidia, measuring 4 – 10.5 × 2 – 3.5 μm, whereas Can. asexualis forms obovoid, pyriform, broadly fusiform, subglobose, ellipsoidal, clavate, or heart-shaped conidia, measuring 3 – 6 × 2.5 – 4 μm) (Mouchacca 1973, Wang et al. 2019 a).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF5B9780B6AFE2948E2FE96.taxon	etymology	Etymology: The epithet canariensis refers to the Canary Islands, due to the geographic origin of the fungus.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF5B9780B6AFE2948E2FE96.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 25242, culture ex-type FMR 18819 = CBS 149955).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF5B9780B6AFE2948E2FE96.taxon	description	On oatmeal agar after 4 wk at 25 ° C: Mycelium scarce, mostly aerial, composed of septate, branching, smooth-and thin-walled, subhyaline to reddish brown, 1 – 2 μm wide hyphae. Ascomata superficial, solitary to aggregated, often covered by aerial mycelium, non-ostiolate, dark brown in reflected light, spherical or subspherical, rarely oblate, 29 – 65 μm diam. (Fig. 4 E, F); peridial wall thin, one-layered, brown to reddish-brown, semi-translucent, of textura epidermoidea (Fig. 4 G). Asci 8 - spored, subglobose, ellipsoidal, or obovate, 10 – 16 × 10 – 15 μm, without visible stalks, soon evanescent (Fig. 4 H). Ascospores irregularly-arranged within the asci, 1 - celled, dark brown when mature, smooth- and thin-walled, ellipsoidal, (7 –) 8 – 9 (– 10) × (4 –) 4.5 – 5 (– 5.5) μm, attenuated at both ends, occasionally flattened at one side, with a subapical germ pore (Fig. 4 I). Asexual morph not observed. Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 8 – 9 mm diam., circular, flat; margin entire and regular; surface grey (28 D 1) to greyish green (28 F 4), with velvety white (5 A 1) aerial mycelium in the central area, and natural (4 B 3) colour at the margins; soluble pigment absent; reverse grey (28 D 1) to greenish grey (28 F 2), with yellowish white margins (4 A 2). Colonies on OA 6 – 7 mm diam., flat, circular; margins entire and regular; surface brownish grey (5 C 2) and black (6 F 3) at the centre; soluble pigment absent; reverse uncoloured. Colonies on CMA 6 – 7 mm diam., flat, circular; margins entire and regular; surface black (6 F 3) at the centre, surrounded by olive brown (4 E 4) halo, with yellowish white (3 A 2) margins; soluble pigment absent; reverse greyish brown (5 F 3) coloured. Colonies on MEA 11 – 12 mm diam., flat and circular; margin entire and regular; surface brownish grey (5 F 2) with scarce dust (5 D 2) aerial mycelium, surrounded by a grey (5 F 1) circle and with cream (4 A 3) margins; soluble pigment present, yellowish; reverse dark grey (1 F 1) at the centre, surrounded by a sepia (4 F 4) halo, with yellowish white (4 A 2) margins. Culture iconography after 4 wk of incubation on PCA, OA, CMA and MEA (Fig. 4 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 12 ° C, 25 ° C and 35 ºC, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF5B9780B6AFE2948E2FE96.taxon	discussion	Notes: Carteria canariensis formed a well-supported terminal branch (0.99 PP / 82 % BS) as a different species in the monospecific clade of Carteria (Fig. 1), differing from C. arctostaphyli by the production of shorter asci (10 – 16 × 10 – 15 μm vs 14 – 18.5 × 11.5 – 16 μm in C. arctostaphyli), ascospores with a typical subapical germ pore (terminal in C. arctostaphyli), and the production of a yellowish soluble pigment on MEA (not reported for C. arctostaphyli) (Wang et al. 2019 a).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF4B9780824FE094C8DFED6.taxon	etymology	Etymology: From Latin ovum -, egg, - idium -, a diminutive suffix, and - sporium, spore, because the fungus produces thallic conidia similar to those of the order Erysiphales (= oidia).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF4B9780824FE094C8DFED6.taxon	type_taxon	Type species: Oidiosporium botulisporum Sastoque, Cano & Stchigel	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF4B9780824FE094C8DFED6.taxon	description	Mycelium abundant, composed of hyaline to brown or reddish-brown, septate, branched, smooth- and thin- to moderately thick-walled hyphae when pigmented, often coiled. Conidiophores absent. Conidia holothallic, aseptate, hyaline or brown to reddish-brown, smooth- and thin-walled to moderately thick-walled, guttulate, subglobose, ellipsoidal, broadly fusiform, barrel-shaped or sausage-shaped, flattened at both ends but without visible scars, formed by remodelling of pre-existing hyphae sections, secession schizolytic, produced in short to long chains.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF4B9730B65FEC94CB2FF36.taxon	etymology	Etymology: From Latin botulus -, sausage, and - spora, spore, because the shape of the thallic conidia.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF4B9730B65FEC94CB2FF36.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), isolated from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 24247, culture ex-type FMR 18828 = CBS 149964).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF4B9730B65FEC94CB2FF36.taxon	description	On oatmeal agar after 4 wk at 25 ° C: Mycelium abundant, composed of hyaline to brown or reddish-brown, septate, branched, smooth- and thin- to moderately thick-walled hyphae when pigmented, 1 – 4.5 μm wide, often coiled (Fig. 5 F). Conidiophores absent. Conidia holothallic, aseptate, hyaline or brown to reddish-brown, smooth- and thin-walled to moderately thick-walled, guttulate, subglobose, ellipsoidal, broadly fusiform, barrel-shaped or sausage-shaped, 8 – 23 × 4 – 8 μm, flattened at both ends but without visible scars, formed by remodelling of pre-existing hyphae sections, secession schizolytic (Fig. 5 G), produced in short to long chains (Fig. 5 F – H). Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 11 – 13 mm diam., flat and circular; margin filamentous and regular; surface sand (4 B 3) with a thin layer of greyish brown (6 F 3) aerial hyphae in the central area and yellowish white (4 A 2) margins; soluble pigment absent; reverse pale yellow (4 A 3) and light yellow in the centre (4 A 4). Colonies on OA 27 – 28 mm diam., flat and circular; margin filamentous and regular; surface champagne (4 B 4) with sparse dark grey (6 F 3), radiated and superficial mycelium and pale yellow (4 A 3) margins; soluble pigment violet brown (10 F 6) after 10 wk (Fig. 6 E); reverse like surface. Colonies on CMA 13 – 14 mm diam., flat and circular; margin filamentous and regular; surface black (6 F 3) with sparse brownish grey (6 F 2) aerial mycelium and olive green (2 F 6) margins; soluble pigment absent; reverse greyish brown (5 F 3). Colonies on MEA 15 – 16 mm diam., flat and circular; margin filamentous and regular; surface with a thin layer of pearl white (3 B 1) and short aerial mycelium; reverse with olive grey (2 F 2) margins. Culture iconography after 4 wk of incubation on PCA, OA, CMA and MEA (Fig. 5 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 15 ° C, 25 ° C and 37 ºC, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFF4B9730B65FEC94CB2FF36.taxon	discussion	Notes: Oidiosporium botulisporum was placed in a fully supported clade close to the type species of the genera Carteria and Thermocarpiscus, but as a distinct genus (Fig. 1). The new genus differs from the latter two by producing an asexual morph consisting of chains of holothallic conidia, whereas C. arctostaphyli and T. australiensis lack asexual morphs (Wang et al. 2019 a, 2022).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFFB9730B6AFF684D02FD36.taxon	etymology	Etymology: From Greek φΑΙΟ -, dun-coloured, - υφέΣ -, hyphae, and - μΎΚΗΣ, fungus, because the fungus produces brown verrucose hyphae as the sole remarkable morphological feature.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFFB9730B6AFF684D02FD36.taxon	type_taxon	Type species: Phaeophyphomyces canariensis Sastoque, Stchigel & Cano	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFFB9730B6AFF684D02FD36.taxon	description	Colonies remaining sterile. Mycelium abundant, consisting in septate, branched, smooth-walled to verrucose or tuberculate, thin- to thick-walled, hyaline to reddish brown hyphae, whose cells swelling with the age.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFFB9720B6AFD684BD5FDD6.taxon	etymology	Etymology: The epithet canariensis refers to the Canary Islands, due to the geographic origin of the fungus.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFFB9720B6AFD684BD5FDD6.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), from soil near the lighthouse, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 25348, culture ex-type FMR 19391 = CBS 151045).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFFB9720B6AFD684BD5FDD6.taxon	description	On potato dextrose agar after one year at 25 ° C: Mycelium abundant composed of septate, hyaline to reddish brown (Fig. 6 E), branched, smooth- to verrucose or tuberculate due to the evagination of the cell wall, thin- to thick-walled, 0.5 – 1 μm wide hyphae, whose cells swollen through age reaching 4 – 16 μm wide (Fig. 6 F). Phaeophyphomyces canariensis differs from its closest phylogenetic species, Thermocarpiscus australiensis, based on nucleotide sequence alignment of four concatenated loci (deposited in Zenodo, doi: 10.5281 / zenodo. 10948357), in the deletions on: ITS positions: 116 (C), 117 (C), 118 (A), 119 (T), 120 (C), 121 (G), 180 (A), 209 (T), 426 (G), 439 (G), 459 (T), 473 (A), 496 (C), 497 (A), 517 (G), 552 (T), 553 (G), 554 (A), 555 (A), 556 (G), 582 (T); LSU positions: 667 (A), 663 (A), 679 (A), 685 (A), 688 (A), 1179 (A); rpb 2 position: 2331 (T); tub 2 positions: 2392 (T), 2393 (T), 2394 (T), 2395 (T), 2396 (T), 2397 (C), 2398 (C), 2399 (G), 2400 (T), 2401 (C), 2402 (C), 2403 (A), 2404 (C), 2405 (C), 2451 (T), 2655 (G), 2656 (G), 2667 (G), 2765 (A), 2769 (C), 2770 (G), 2888 (T), 2926 (A), 2991 (C), 2993 (T), 2994 (G). Culture characteristics (after 7 d at 25 ° C): Colonies on PCA reaching 2 – 2.5 mm diam., flat, circular and restricted; margins filamentous and regular; surface grey (5 E 3), with a sparse, floccose white (5 E 1) aerial mycelium, which is absent at the margins; soluble pigment absent; reverse pale grey (1 B 1). Colonies on OA reaching 1.5 – 2 mm diam., flat, circular, and restricted; margins filamentous and regular; surface bronze (5 E 5) coloured with a white (5 A 1) sparse aerial mycelium; soluble pigment absent; reverse bronze (5 E 5). Colonies on CMA reaching 2 – 2.5 mm diam., flat and circular; margins filamentous and regular; surface uncoloured with a floccose white (4 A 1) aerial mycelium at the centre; soluble pigment absent; reverse uncoloured. Colonies on MEA reaching 3 – 4 mm diam., flat and circular; margins entire and regular, surface brown (5 E 4), with a white (5 A 1) floccose aerial mycelium, which is absent at the margins; soluble pigment absent; reverse dark blonde (5 D 4). Culture iconography after 4 wk of incubation on PCA, OA, CMA and MEA (Fig. 6 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 20 ° C, 25 ° C and 30 ° C, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFFB9720B6AFD684BD5FDD6.taxon	discussion	Notes: Phaeophyphomyces canariensis was placed in a fully supported clade close to T. australiensis, but as a different genus (Fig. 1). This fungus lacks fertile structures but is molecularly easily distinguishable from the rest of the Chaetomiaceae based on the sequences of phylogenetically informative molecular markers. Using the BLAST search tool, the closest hits the rpb 2 sequence was Arcopilus megasporus CBS 127650 [GenBank MZ 342971; identities = 732 / 832 (87.98 %), four gaps (0 %)] and T. australiensis CBS 493.74 [GenBank KM 655419; identities = 751 / 857 (87.63 %), no gaps]. Using the tub 2 sequence, it was T. australiensis CBS 493.74 [GenBank MZ 343024; identities = 440 / 549 (80.15 %), 26 gaps (4 %)].	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFEB9710B65FDC84D16FE76.taxon	etymology	Etymology: From Latin cinnamomum -, cinnamon, - brunneae, brown, due to the colour of the conidia.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFEB9710B65FDC84D16FE76.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), isolated from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 25248, culture ex-type FMR 18980 = CBS 150900).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFEB9710B65FDC84D16FE76.taxon	description	On potato carrot agar after 2 wk at 25 ° C: Mycelium composed of somatic hyphae hyaline, septate, branched, forming several spirals, smooth- and thin-walled, 1 – 2 μm wide. Conidiophores undifferentiated. Conidiogenous cells integrated to the vegetative hypha. Conidia holoblastic and 1 - celled, solitary or less frequently in chains of two, sessile (Fig. 7 E), on short conical denticles or on short (sometimes subglobose or obovoid) side branches from the hyphae (Fig. 7 F, G), smooth- and thick-walled, covered by mucilaginous and dark brown substance, becoming verrucose to reticulate when old, sometimes intercalary (holothallic), then 1 − 2 - celled, pale olivaceous brown to brown, globose, subglobose, obovoid, pyriform, less frequently ovoid, obpyriform or ellipsoidal, (4 –) 7 – 9 (– 10) × (5 –) 8 – 10 (– 12) μm (Fig. 7 E – G). Acremonium-like synasexual morph and sexual morph not observed. Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 46 – 47 mm diam., circular and flat; margin filamentous and regular; surface showing white (4 A 1) aerial mycelium and grey (5 B 1) bottom only in the central area, surrounded by a cream (4 A 3) zone and yellowish white (4 A 2) margins; soluble pigment absent; reverse yellowish grey (4 B 2) in the centre, grey (5 B 1) and yellowish white margins (4 A 2). Colonies on OA 37 – 40 mm diam., flat, circular, and expansive; margin filamentous and regular; surface uncoloured with scarce floccose greyish white (4 B 1) aerial hyphae in the centre; soluble pigment absent; reverse uncoloured. Colonies on CMA 40 – 45 mm diam., circular and flat; margin filamentous and regular; surface hair brown (5 E 4) with scarce white (8 A 1) aerial hyphae in the centre, margins yellowish white (4 A 2); soluble pigment absent; reverse bronze (5 E 5). Colonies on MEA 45 – 46 mm diam., flat and circular; margin filamentous and slightly undulated; surface yellowish grey (4 B 2) with scarce and floccose white (8 A 1) aerial hyphae in the centre, surrounded by a pastel red (8 A 5) halo and pale yellow (4 A 2) margins; reverse light-yellow (4 A 4) in the centre, cream (4 A 3) and pale yellow (4 A 2) margins. Culture iconography after 2 wk of incubation on PCA, OA, CMA and MEA (Fig. 7 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 12 ° C, 30 ° C and 45 ° C, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFEB9710B65FDC84D16FE76.taxon	discussion	Notes: Pseudohumicola cinnamobrunnea was located as a distinct species in a fully supported terminal clade together the ex-type strains of Humicola glauca CBS 462.76 and Pseudohumicola semispiralis CBS 723.97 (0.99 PP / 94 % BS; Fig. 1). Pseudohumicola cinnamobrunnea differs from Pseudohumicola semispiralis by lacking a sexual morph (chaetomium-like in P. semispiralis) and by the production pale olivaceous brown to brown sessile to stalked conidia (hyaline to olivaceous sessile conidia in P. semispiralis) (Udagawa & Cain 1969, Wang et al. 2019 b).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFDB9700B6AFE284C5AFDD6.taxon	etymology	Etymology: In honour of Marco de Bertoldi, an Italian mycologist who also isolated this fungus.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFDB9700B6AFE284C5AFDD6.taxon	materials_examined	Typus: Italy, Sardinia, Sassari, soil from Quercus sp. forest, 1969, coll. and isol. M. de Bertoldi (lectotype designated here CBS H- 25748, MBT 10026333, culture ex-type CBS 460.76 = FMR 20616).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFDB9700B6AFE284C5AFDD6.taxon	description	On potato carrot agar after 2 wk at 25 ° C: Mycelium abundant, composed of hyaline, septate, branched, smooth-and thin-walled, 1 – 3 μm wide hyphae. Conidiophores absent. Conidiogenous cells integrated to the hyphae. Conidia mostly holoblastic, mostly unicellular, rarely 1 - septate, solitary or in clusters, sessile or on short conical denticles or on short side branches, smooth- and thin-walled at first, becoming verruculose and thick-wall with the age, occasionally intercalary (holothallic) (Fig. 8 E), sub-hyaline to brown, globose, subglobose, oblate, ellipsoid, obovoid, piriform, ovoid, fusiform or cylindric, (4 –) 7 – 11 (– 13) × (4 –) 7 – 12 (– 13) µm, mostly truncated at one end, or at both ends (if intercalary), secession rhexolytic (Fig. 8 E). Acremonium-like synasexual morph present; conidiophores reduced to a conidiogenous cell; conidiogenous cell phialidic, arising on (discrete) or integrated to (adelophialides) the hyphae, hyaline, simple or 1 - branched, flask-shaped (monophialides) or v-shaped (polyphialides) (Fig. 8 F), 3 – 12 × 1 – 3 µm, mostly ventricose at the base and with a long neck that tapers progressively towards the apex; conidia enteroblastic, hyaline, formed basipetally in chains, unicellular, obovoid, 2 – 4 × 1 – 2 µm, truncated at the base and rounded at the apex (Fig. 8 F). Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 28 – 30 mm diam., flat and circular; margins entire and regular, brown (5 F 3) at the centre with radiated stripes showing sparse white (5 A 1) aerial mycelium at the centre; soluble pigment absent; reverse greyish brown (5 E 3) at the centre, with radiated dark brown (5 F 3) stripes and margins uncoloured. Colonies on OA 32 – 33 mm diam., flat, circular, and expansive; margins filamentous and regular; surface uncoloured, with a floccose white (4 A 1) aerial mycelium at the centre; soluble pigment absent; reverse uncoloured, cream (4 B 3) at the centre. Colonies on CMA 25 – 27 mm diam., flat, circular, and expansive; margins entire and regular; surface sepia (4 F 4), with a scarce white (5 A 1) floccose mycelium at the centre, and greyish green (30 E 5) superficial spots, margins uncoloured; soluble pigment absent; reverse dark green (30 F 5) at the centre. Colonies on MEA 27 – 28 mm diam., flat and circular; margins entire and regular; surface dark brown (5 E 4) with a white (5 A 1) floccose mycelium at the centre, and margins cream (4 B 3); soluble pigment absent; reverse similar than the surface. Culture iconography after 2 wk of incubation on PCA, OA, CMA and MEA (Fig. 8 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 5 ° C, 30 ° C and 40 ° C, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFDB9700B6AFE284C5AFDD6.taxon	discussion	Notes: Humicola lutea CBS 460.76 was placed in the same fully supported clade as P. lutea COAD 3127, being consequently transferred to the genus Pseudohumicola as P. debertoldii (Fig. 1). Pseudohumicola debertoldii differs from P. lutea by the production of unicellular, rarely 1 - septate conidia, smooth- and thin-walled at first, becoming verruculose and thick-wall with the age, with intercalary (holothallic) conidia, (4 –) 7 – 11 (– 13) × (4 –) 7 – 12 (– 13) µm and the production of an acremonium-like synasexual morph, in contrast to P. lutea, which produces lateral and terminal, single-cell, thick- but smooth-walled conidia, (7.5 –) 10.8 – 11.8 (– 14.5) × (7.2 –) 10.4 – 11.2 (– 12) μm and lacking an acremonium-like synasexual morph (Oliveira et al. 2023).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFCB96F0B65FDC84BCCFE36.taxon	materials_examined	Typus: Italy, nematode-infested soil, 1970, coll. and isol. M. de Bertoldi (lectotype designated here CBS H- 7238, MBT 10026348, culture ex-type CBS 462.76 = MUCL 19429 = FMR 19938).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFCB96F0B65FDC84BCCFE36.taxon	description	On potato carrot agar after 2 wk at 25 ° C: Mycelium composed of hyaline, septate, branched, smooth- and thin-walled, 1 – 2 μm wide hyphae. Conidiophores absent. Conidiogenous cells integrated to the hyphae. Conidia holoblastic, unicellular, solitary, sessile or on short conical denticles or on short side branches (Fig. 9 E), less frequently in short chains or forming few-celled clusters (Fig. 9 F), or intercalary (holothallic; Fig. 9 F), smooth- and thick-walled, covered by a mucilaginous and dark brown substance, becoming verrucose to reticulate when old, pale olivaceous brown to brown, globose, subglobose, oblate, ellipsoid, obovoid, piriform, occasionally ovoid or cylindric, (4 –) 7 – 8 (– 9) × (4 –) 8 – 10 (– 15) μm (Fig. 9 E, F). Acremonium-like synasexual morph and sexual morph not observed. Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 30 – 31 mm diam., flat and circular; margins filamentous and regular; surface chocolate (6 F 4) at the centre, with a white (6 A 1) aerial mycelium, margins yellowish white (4 A 2); soluble pigment absent; reverse dark brown (6 F 2) at the centre, surrounded by a chocolate (6 F 4) halo, margins yellowish-white (4 A 2). Colonies on OA 37 – 39 mm diam., flat and circular and expansive; margins filamentous and regular; surface dark brown (5 F 8), with a floccose white (4 B 1) aerial mycelium at the centre, margins cream (4 B 3); soluble pigment absent; reverse dark brown (5 F 8) at the centre, marble-white (5 B 2) at the margins. Colonies on CMA 31 – 34 mm diam., flat and circular; margins filamentous and regular; surface dark brown (5 F 5) at the centre, with a scarce white (5 A 1) aerial mycelium, margins yellowish white (4 A 2) to uncoloured; soluble pigment absent; reverse similar in colour than the surface. Colonies on MEA 35 – 36 mm diam., flat and circular; margins filamentous and regular; surface brown (5 E 5) with a floccose white (8 A 1) aerial mycelium at the centre, margins yellowish white (4 A 2); reverse cream (4 A 3) but brown (5 E 4) at the centre. Culture iconography after 2 wk of incubation on PCA, OA, CMA and MEA (Fig. 9 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 15 ° C, 30 ° C and 37 ° C, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFCB96F0B65FDC84BCCFE36.taxon	materials_examined	Additional material examined: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), isolated from Teneguía volcano soil, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (culture FMR 18982 = CBS 150904).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFFCB96F0B65FDC84BCCFE36.taxon	discussion	Notes: Humicola glauca CBS 462.76 was placed close to P. semispiralis CBS 723.97 (Fig. 1), and consequently transferred to the genus Pseudohumicola. Pseudohumicola glauca differs from Pseudohumicola semispiralis by lacking a sexual morph and by the size and shape of conidia [globose, subglobose, oblate, ellipsoid, obovoid, piriform, occasionally ovoid or cylindric, (4 –) 7 – 8 (– 9) × (4 –) 8 – 10 (– 15) μm in P. glauca vs globose to oblate, sometimes ovoid, (8.5 –) 9 – 11 μm diam. in P. semispiralis] (Udagawa & Cain 1969, Wang et al. 2019 b).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE3B96E0B6AFE684B77FDD6.taxon	etymology	Etymology: From Latin intercalaris -, intercalary, and - spora, spore, due to the presence of holothallic intercalary conidia.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE3B96E0B6AFE684B77FDD6.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 25245, culture ex-type FMR 19235 = CBS 149962).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE3B96E0B6AFE684B77FDD6.taxon	description	On potato carrot agar after 2 wk at 25 ° C: Mycelium composed of hyaline, septate, branched, smooth- and thin-walled, 1 – 2.5 μm wide hyphae, often forming spirals (Fig. 10 E). Conidiophores undifferentiated. Conidiogenous cells integrated to the vegetative hypha. Conidia mostly holoblastic and 1 - celled, solitary or less frequently in chains of two, sessile, on short conical denticles or on short side branches from the hyphae (Fig. 10 E, F), smooth- and thick-walled, covered by mucilaginous and dark brown substance, becoming verrucose to reticulate when old (Fig. 10 F), sometimes intercalary (holothallic) (Fig. 10 F), then 1 - celled, pale olivaceous brown to brown with dark brown walls, globose, subglobose, obovoid, pyriform, less frequently ovoid, obpyriform or ellipsoidal, (4 –) 7 – 9 (– 10) × (4 –) 7 – 10 (– 11) μm (Fig. 10 E, F). Acremonium-like synasexual morph and sexual morph not observed. Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 20 – 30 mm diam., circular and flat; margin filamentous, regular to lobulated; surface showing white (6 A 1) aerial mycelium in the central area, surrounded by a brownish-grey (6 F 2) circle and with yellowish-white (4 A 2) narrow or wide margins; soluble pigment absent; reverse brownish-grey (6 F 2) to brown (6 E 5) with yellowish-white margins (4 A 2). Colonies on OA 29 – 33 mm diam., flat, circular, and expansive; margin filamentous and regular; surface with scarce and floccose grey (6 E 1) aerial hyphae only in the centre, bottom brownish grey (5 F 2) and margins bronze (5 E 5) without aerial hyphae; soluble pigment absent; reverse greyish brown (5 F 3) and margins hair brown (5 E 4). Colonies on CMA 22 – 23 mm diam., circular and flat; margin filamentous and regular; surface chocolate (6 F 4) with floccose greyish white (6 B 1) aerial hyphae in the central area, around and margins brown (5 F 6); soluble pigment absent; reverse chocolate (6 F 4) in the centre and wide tobacco (5 F 6) margins. Colonies on MEA 28 – 30 mm diam. after 7 d at 25 ° C; flat and circular; margin entire and regular; surface brownish orange (6 C 3) with white (6 A 1) aerial hyphae in the centre, sand (4 B 3) and with yellowish-white (4 A 2) margins; soluble pigment absent; reverse pale orange (6 A 3) in the centre, surrounded by greyish-orange (5 B 3) and margins orange-white (5 A 2). Culture iconography after 2 wk of incubation on PCA, OA, CMA and MEA (Fig. 10 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 12 ° C, 30 ° C and 37 ° C, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE3B96E0B6AFE684B77FDD6.taxon	discussion	Notes: Pseudohumicola intercalarispora was placed as a distinct species in a basal branch of a well-supported clade (1 PP / 99 % BS) including Pseudohumicola alba COAD 3126 (Fig. 1). Pseudohumicola intercalarispora differs from P. alba by the presence of abundant intercalary conidia (absent in P. alba) and by the absence of an phialidic synasexual morph (present in P. alba) as well as the shape and size of humicolalike conidia [globose, subglobose, obovoid, pyriform, less frequently ovoid, obpyriform or ellipsoidal, (4 –) 7 – 9 (– 10) × (4 –) 7 – 10 (– 11) μm in P. intercalarispora and globose to subglobose or obovoid, with a truncated base, (8.3 –) 9.6 – 10.4 (– 12.6) × (7.0 –) 8.8 – 9.6 (– 10.4) μm in P. alba] (Oliveira et al. 2023).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE2B96C0B65FDC84AD6FEB6.taxon	etymology	Etymology: From Latin variis -, diverse, and - spora, spore, due to the morphological variability of the conidia.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE2B96C0B65FDC84AD6FEB6.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), isolated from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 25244, culture ex-type FMR 18822 = CBS 149960).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE2B96C0B65FDC84AD6FEB6.taxon	description	On potato carrot agar after 4 wk at 25 ° C: Mycelium abundant, composed of hyaline, septate, branched, smooth-and thin-walled, 0.5 – 3 μm wide hyphae. Conidiophores undifferentiated. Conidiogenous cells integrated to the vegetative hypha. Conidia mostly holoblastic and 1 - celled, solitary, sessile, on short conical denticles or on short side branches from the hyphae (Fig. 11 E), smooth- and thick-walled, covered by mucilaginous and dark brown sheath, becoming verruculose when old (Fig. 11 E, J), rarely 2 − 3 - celled, sometimes generating secondary conidia to form short chains (2 − 3 - celled) (Fig. 11 E – H), occasionally intercalary (holothallic), then 1 − 2 - celled (Fig. 11 I), brown, globose, subglobose, oblate, ellipsoid, obovoid, piriform, occasionally ovoid or cylindric, (3 –) 7 – 8 (– 9) × (4 –) 7 – 10 (– 15) μm, mostly truncated at the base or at both ends (when intercalary), secession rhexolytic (Fig. 11 E – J). Acremonium-like synasexual morph and sexual morph not observed. Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 9 – 12 mm diam., circular and flat; margin lobulated to irregular; surface showing white (4 A 1) aerial mycelium in the central area, surrounded by a black (4 F 1) superficial area and with cream (4 B 3) margins; soluble pigment absent; reverse black (4 F 2) to smoke brown (4 F 1) with yellowish white margins (4 A 2). Colonies on OA 28 – 30 mm diam., flat, circular and expansive; margin entire and regular; surface dry, opaque, with floccose white (6 A 1) aerial hyphae only in the central area, margins cream (4 A 3) without aerial hyphae and chocolate (6 F 4) short, radiated lines at the bottom; soluble pigment absent; reverse yellowish brown (5 F 8) in the centre with short radiated lines and margins yellowish-white (3 A 2). Colonies on CMA 11 – 14 mm diam., circular and flat; margin entire and regular; surface canary yellow (2 B 7) with scarce greyish white (4 B 1) aerial hyphae in the centre, margins uncoloured; soluble pigment absent; reverse greyish yellow (2 B 5). Colonies on MEA 17 – 18 mm diam., flat and circular; margin filamentous and undulated; surface light yellow (3 A 5) in the centre to cream (4 A 3) without aerial hyphae; soluble pigment absent; reverse butter-yellow (4 A 5) in the centre and margins cream (4 A 3). Culture iconography after 2 wk of incubation on PCA, OA, CMA and MEA (Fig. 11 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 12 ° C, 30 ° C and 40 ° C, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE2B96C0B65FDC84AD6FEB6.taxon	discussion	Notes: Pseudohumicola variispora was placed in a fully supported clade close to P. lutea COAD 3127 and P. debertoldii CBS 460.76, but as a different species in a basal branch (Fig. 1). Pseudohumicola variispora differs from P. lutea by presence of 2 − 3 - celled sessile conidia and 1 − 2 - celled intercalary conidia, and by the formation of thick-walled verrucose conidia in P. variispora, while P. lutea does not produce intercalary conidia, the conidia are unicellular and thick but smooth-walled (Oliveira et al. 2023). Pseudohumicola variispora differs from P. debertoldii in having lateral, terminal and intercalary 2 − 3 - celled conidia covered by mucilaginous and dark brown sheath, and sometimes produces secondary conidia to form short chains (2 − 3 - celled) and does not present an acremonium-like asexual morph.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE0B96B0824FCC94AF3FDD6.taxon	etymology	Etymology: canariensis, from Canary Islands (Spain), due to the geographic origin of the fungus.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE0B96B0824FCC94AF3FDD6.taxon	materials_examined	Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), isolated from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (holotype CBS H- 25347, culture ex-type FMR 19096 = CBS 150903).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE0B96B0824FCC94AF3FDD6.taxon	description	On oatmeal agar after 3 mo at 25 ° C: Mycelium mostly aerial, abundant, composed of septate, branching, smooth-and thin-walled, hyaline to brown hyphae, 1 – 2 μm wide. Chlamydospores, hyaline, smooth- and slightly thick-walled, globose, subglobose or barrel-shaped, 11 – 19 × 7 – 13 μm, in chains, with several big lipid vacuoles (Fig. 12 E, F). Sexual morph not observed. Culture characteristics (after 7 d at 25 ° C): Colony on PCA 28 – 29 mm diam., flat and circular; margin filamentous and regular; surface uncoloured with white (4 A 1) floccose aerial hyphae, sparse on the margins; soluble pigment absent; reverse uncoloured to white (4 A 1). Colonies on OA 25 – 27 mm diam., flat, circular, and expansive; margin filamentous and regular; surface greyish yellow (4 B 3) coloured with white (4 A 1) sparse aerial mycelium around and at the centre; soluble pigment absent; reverse uncoloured to greyish yellow (4 B 3). Colonies on CMA 31 – 32 mm diam., flat and circular; margin filamentous and regular; surface uncoloured with floccose white (4 A 1) aerial hyphae around at the centre; soluble pigment absent; reverse yellowish white (4 A 2). Colonies on MEA 40 – 41 mm diam., flat and circular; margin filamentous and regular; surface greyish yellow (4 B 3), with white (4 A 1) floccose aerial mycelium, sparse on the margins; soluble pigment absent; reverse greyish yellow (4 B 3). Culture iconography after 5 wk of incubation on PCA, OA, CMA and MEA (Fig. 12 A – D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 15 ° C, 30 – 37 ° C and 45 ° C, respectively.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE0B96B0824FCC94AF3FDD6.taxon	materials_examined	Additional specimens examined. Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A. M. Stchigel, isol. A. P. Sastoque (culture FMR 18932).	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE0B96B0824FCC94AF3FDD6.taxon	discussion	Notes: Steirochaetomium canariensis was located as a monospecific fully supported linage related but different to the Chaetomium clade (Fig. 1). Steirochaetomium canariensis does not produce fertile structures. However, it forms big chlamydospores with several big lipid vacuoles, which have not been observed in Arxotrichum, Corynascus, Chaetomium and Parachaetomium. Moreover, it is easily molecularly distinguishable from the other genera of the family Chaetomiaceae (Wang et al. 2016 a, 2019 a, b, 2022). Based on a BLAST search of the NCBI’s GenBank nucleotide database, the closest match using the rpb 2 sequence was Parachaetomium mareoticum [CBS 781.71, GenBank MZ 342993; Identities = 598 / 688 (86.92 %), four gaps (0 %)]. Lastly, using the tub 2 sequence, the closest match was Parachaetomium biporatum [CBS 244.86, GenBank MK 919417; identities = 427 / 521 (81.96 %), 23 gaps (4 %)].	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE0B96C0824FEE94A0AFCD6.taxon	etymology	Etymology: From Greek ΣΤείΡΟΣ - (steíros -), sterile, because the fungus does not produce fertile structures.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE0B96C0824FEE94A0AFCD6.taxon	type_taxon	Type species: Steirochaetomium canariensis Sastoque, Stchigel & Cano	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
A05D87DAFFE0B96C0824FEE94A0AFCD6.taxon	description	Mycelium mostly aerial, abundant, composed of septate, branching, smooth- and thin-walled, hyaline and pigmented hyphae. Chlamydospores, hyaline, vacuolated, smooth- and slightly thick-walled, globose, subglobose or barrel-shaped, in chains. Sexual morph not observed.	en	Sastoque, A. P., Cano-Lira, J. F., Stchigel, A. M. (2025): Soil ascomycetes from Spain. XIV. The Chaetomiaceae of La Palma (Canary Islands). Persoonia 54 (1): 93-117, DOI: 10.3114/persoonia.2025.54.03, URL: https://doi.org/10.3114/persoonia.2025.54.03
