Biatriosporaceae K.D. Hyde, Fungal Divers. 63: 50 (2013)

MycoBank number: MB 803357; Index Fungorum number: IF 803357; Facesoffungi number: FoF 08166, 1 species.

Saprobic on decaying submerged intertidal mangrove wood. Sexual morph: Ascomata lying horizontal, immersed in substratum, subglobose to pyriform, solitary or gregarious, black, ostiolate. Peridium thin, composed of brown pseudoparenchymatous cells. Hamathecium comprising dense, thin, anastomosing, branching, trabeculate, pseudoparaphyses, embedded in a gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, cylindrical, long pedicellate. Ascospores overlapping 1- seriate, fusiform, dark brown, with hyaline rounded ends, 1–4-septate toward each end, aseptate in the centre, not constricted at the septa in the centre part, smooth-walled, releasing mucilage from the ends. Asexual morph: Pycnidia solitary or rarely confluent, on upper surface or submerged in agar, globose to subglobose or pyriform, with dark brown, septate mycelial outgrowths, papillate, ostiolate, olivaceous to olivaceous-black, the wall with pseudoparenchymatous cells. Conidiogenous cells hyaline, phialidic, discrete. Conidia ellipsoidal, subhyaline, brown in mass, aseptate.

TypeBiatriospora K.D. Hyde & Borse.

Notes – The monogeneric family Biatriosporaceae was established by Hyde et al. (2013) to accommodate a marine genus Biatriospora typified by B. marina (Hyde & Borse 1986) based on morphological and molecular data (Hyde et al. 2013).


Fig. Biatriospora marina (Material examined: SEYCHELLES, on submerged wood of Rhizophora, 2 January 1985, K.D. Hyde, IMI 297768, holotype). a Ascomata semi-immersed on host. b Vertical section of ascoma. c Peridium. d Pseudoparaphyses stained with lactophenol cotton blue. e–f Bitunicate asci. h–i Ascospores. g Pedicle. Scale bars: b, c =100μm. e =50μm. d, f–i =20μm