Pleosporales » Tetraplosphaeriaceae


Pseudotetraploa Kaz. Tanaka & K. Hirayama, in Tanaka et al., Studies in Mycology 64: 193 (2009).

Index Fungorum number: IF 515257; Facesoffungi number: FoF 06669, 4 morphological species (Species Fungorum, 2022), 4 species with molecular data.

Saprobic on host. Sexual morph: Unknown. Asexual morph: Mycelium superficial. Conidiophores absent. Conidiogenous cells monoblastic, indistinguishable form creeping hyphae. Conidia composed of 4 to 8 columns, obpyriform to long obpyriform, brown to dark brown, almost smooth, verrucose at the base, pseudoseptate, with setose appendages at the apical part. Appendages mostly 4, rarely 6 to 8, curved or straight  (adapted from Tanaka et al. 2009).


 Type species: Pseudotetraploa curviappendiculata (Sat. Hatak., Kaz. Tanaka & Y. Harada) Kaz. Tanaka & K. Hiray.


Notes: Pseudotetraploa is characterised by superficial mycelium, monoblastic conidiogenous cells, and obpyriform to long obpyriform, brown to dark brown conidia. Pseudotetraploa has similar conidia to Tetraploa but it has setose appendages while Tetraploa has long and straight appendages. Pseudotetraploa also resembles Ceratosporella, Paratetraploa, Triposporium and Tretospeira in conidial morphology but the latter genera have macro- or semi-macronematous conidiophores. Tanaka et al. (2009) transferred three species of Tetraploa that were not congeneric with the type species, T. aristata to Pseudotetraploa. Hyde et al. (2020) added another species, P. rajmachiensis from decaying culms of Dendrocalamus stocksii (Poaceae). The sexual morph of Pseudotetraploa is not known. Pseudotetraploa is morphologically and phylogenetically a distinct genus in Tetraplosphaeriaceae. Molecular markers available for Pseudotetraploa include ITS, LSU, SSU, BTUB and TEF-1.


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