Neopodoconis yunnanensis W.P. Wang, H.W. Shen & Z.L. Luo, 2023

Wang, Wen-Peng, Shen, Hong-Wei, Bao, Dan-Feng, Lu, Yong-Zhong, Yang, Qiu-Xia, Su, Xi-Jun & Luo, Zong-Long, 2023, Two novel species and three new records of Torulaceae from Yunnan Province, China, MycoKeys 99, pp. 1-24 : 1

Neopodoconis yunnanensis W.P. Wang, H.W. Shen & Z.L. Luo sp. nov.

Fig. 2

Etymology.

Referring to the collection location, Yunnan Province of China.

Holotype.

KUN-HKAS 121702.

Description.

Saprobic on submerged decaying wood. Sexual morph Undetermined. Asexual morph: Colonies grow on the surface of the substrate, black, hairy, and distinct branches can be seen. Mycelium immersed in the substrate, composed of pale brown, septate, unbranched hyphae. Conidiophores 174-648 × 8.2-17.5 μm (x̄ = 311 × 12 μm, n = 30), macronematous, mononematous, concentrated, erect, dark brown to black, smooth-walled, septate, unbranched, straight or slightly flexuous, pale pigment at apex. Conidiogenous cells 18-34 × 9-14 μm (x̄ = 27 × 12 μm, n = 30), monoblastic or polyblastic, integrated, terminal, cylindrical, smooth, dark brown to black. Conidia 100-155 × 23-38 μm (x̄ = 128 × 28 μm, n = 20), solitary, smooth, dry, pyriform to fusiform, dark brown to black, light brown at the apex, granular inclusions, rostrate, guttulate, 5-7-septate, dark bands at the septa, slightly cicatrized at narrow, black truncate scar at base and pale pigment cell above the scar, wide in the middle.

Material examined.

China, Yunnan Province, Dali City, Cangshan Mountain, Mocanxi Stream (25°64′82.95″N, 100°15′80.33″E), on submerged decaying wood, 11 April 2020, Zheng-Quan Zhang, S 2690 (KUN-HKAS 121702, holotype), ex-type culture (KUNCC 22-10737) .

Notes.

Neopodoconis yunnanensis fits well with the generic concept of Neopodoconis in having erect, septate conidiophores, terminal, cylindrical conidiogenous cells, and rostrate, septate conidia with a subhyaline base. Phylogenetic analyses showed that Neopodoconis yunnanensis constitutes a strongly supported (100% ML/1.00 PP) independent lineage that is basal to four Neopodoconis species viz. N. aquaticum , N. cangshanense , N. saprophyticus and N. pandanicola . Neopodoconis yunnanensis (KUN-HKAS 121702) differs from N. aquaticum in having shorter but broader conidia (100-155 × 23-38 vs. 134-180 × 22-26 μm). Additionally, it has smooth conidiophores, lacks constriction at septum, larger conidia compared to N. pandanicola (100-155 × 23-38 μm vs. 55-110 × 18-26 μm), different from N. cangshanense in terms of larger size (100-155 × 23-38 vs. 94-109 × 11-24 μm), and lacks hyaline sheath in the apex of conidia. We, therefore, describe the newly obtained taxon as a new species based on both morphology and multigene phylogeny ( Su et al. 2018; Tibpromma et al. 2018; Shen et al. 2021).

Figures

Figure 2. Neopodoconis yunnanensis (KUN-HKAS 121702, holotype) A, B fungal structures on the substratum C conidiophore with conidia on the stroma D conidiophore with conidia E-G conidiogenous cells H-M conidia N germinating conidium. Scale bars: 150 μm (C, D), 20 μm (E-G), 50 μm (H-N).