Pseudoacrodictys limoniaceae Y.R.Ma & X.G.Zhang, 2016

Cantillo, Taimy, Almeida, Davi Augusto Carneiro De, Monteiro, Josiane Santana & Gusmão, Luís F. P., 2019, Pararhexoacrodictys (Incertae sedis, Ascomycetes) gen. nov., new combinations and new records of hyphomycetes from Brazil, Phytotaxa 397 (2), pp. 199-209 : 206

Pseudoacrodictys limoniaceae Y.R.Ma & X.G.Zhang , Nova Hedwigia, 102: 71, 2016 Fig. 3B

Conidiophores mononematous, macronematous, erect, straight or slightly flexuous, arising singly or in small groups, cylindrical, smooth, dark brown to blackish brown, often swollen at the base, up to 97.5 μm long, 3–5.5 (6.5) μm wide. Conidiogenous cells integrated, terminal, turbinate to pyriform, monoblastic, up to three flask or barrel-shaped percurrent extensions, thick-walled, smooth, swollen. Secession schizolytic. Conidia solitary, dry, acrogenous, holoblastic, subglobose to globose, septate, smooth, thick–walled, brown to dark brown, 30–38.75 × 28.75–32.5 μm. Basal cell protuberant, cuneate, broadly truncate, delimited by a transverse septum, 5–6.5 μm wide. Appendages 3–6, aseptate, smooth, curved, pale brown to brown, 6–10 × 1.5–4.5 μm, distally clustered or scattered.

Material examined:— BRAZIL. Bahia: Igrapiúna, Reserva Ecológica de Michelin, on submerged dead twigs., 13°49’S 39°08’W, 22 November 2014, D.A.C. Almeida s.n. ( HUEFS 203038).

Notes:— The Brazilian specimen differs from the original description in having broader conidia, maybe due to be found on submerged debris in contrast with the type species (described from terrestrial material) but all the other features fit well with the description of Ps. limoniaceae ( Ma et al. 2016) . Our material shows also conidial appendages scattered, more frequently in broader but even when appendages in Ps. limoniaceae were described as distally clustered, according to the picture in Ma et al. (2016) they also can be scattered.

This fungus is also very similar with Ps. corniculata . This last species was described as having appendages clustered distally but in the second record was observed that sometimes the conidial appendages were not just apically clustered but segregated and laterally placed, especially in broadly pyriform conidia ( Delgado 2011); the same author also found conidiophores with up to 2 cylindrical extensions, occasionally branched, and often showing an irregular tear of the proximal periclinal wall and some conidia carried away a short piece of conidiophore once released. This feature was also mentioned by Baker & Morgan-Jones (2003) and they concluded that is not related with rhexolytic secession. This last character has not been observed in our material and also has not been mentioned in original description of Ps. limoniaceae , even when in the fig. 2 E from Ma et al. (2016), at least one conidia is carrying a short peace of the conidiogenous cell. Another difference between these two species is that Ps. corniculata have cylindrical conidiogenous cells whereas in Ps. limoniaceae are turbinate to obpyriforum with usually with up to five flask or barrel-shaped percurrent elongations.

This is the second world record for this taxon.

Geographical distribution: — CHINA ( Ma et al. 2016); BRAZIL (this paper).

Figures

FIGURE 3. New records for Brazil: A Pseudoacrodictys aquatica HUEFS 203037. B, Pseudoacrodictys limoniaceae HUEFS 203038. C- E Shrungabeeja varijadencens HUEFS 216690: C, conidial bottom with striations from side and bottom view; hyaline septate hyphae observed in conidia initials (D) and in a fully development conidia (E). Scale bars: A–C, E, F= 20 μm; D= 30 μm.