Pleosporales » Pleosporales, genus incertae sedis


Dokmaia Promp., in Promputtha et al., Sydowia 55(1): 100 (2003).

Index Fungorum number: IF 28694; Facesoffungi number: FoF 11807, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic on host. Sexual morph: Unknown. Asexual morph: Synnemata arising from stromatic base, erect, stroma-like, solitary to scattered, indeterminate, cylindrical, brown, with white covering of conidiogenous cells and conidia. Hyphae of synnemata flexuous, brown, septate, textura intricata. Conidiogenous cells polyblastic, arising from pale brown, parenchymatous-like cells, forming at apex and in parallel rows along upper half of synnemata, discrete, hyaline, denticulate; denticles cylindrical. Conidia hyaline, smooth, aseptate, cylindrical, obovoid or fusiform, apex rounded, base truncate, with a marginal frill. Conidial secession rhexolytic (adapted from Promputtha et al. 2003).


Type species: Dokmaia monthadangi Promp.


Notes: Dokmaia is characterised by solitary to scattered, indeterminate, cylindrical, brown synnemata, polyblastic conidiogenous cells and hyaline, smooth, aseptate, cylindrical conidia with rhexolytic conidial secession. Dokmaia resembles members of Phaeoisaria in having synnemata and conidiogenous cells which proliferate sympodially and produce conidia on long denticles. Dokmaia differs from Phaeoisaria in that the former produce conidia by rhexolytic secession which forms a basal frill on the conidia whereas conidial secession in Phaeoisaria is schizolytic devoid of any remnants of broken cell-walls at base (de Hoog and Papendorf 1996; Castaneda Ruiz et al. 2002). Dokmaia also resembles Nodulisporium in having solitary, 1-celled, ellipsoid or obovoid conidia with a small frill on the truncate base but differs in that the conidiogenous cells of Nodulisporium, are casually arranged, at times penicillately while those of Dokmaia are in parallel rows and well-arranged. The taxonomic placement of Dokmaia is uncertain and is currently in Pleosporales, genera incertae sedis. Fresh collections with sequence data are needed to confirm the taxonomic placement of the genus. Molecular markers available for Dokmaia are ITS and SSU.


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