Tirisporella E.B.G. Jones, K.D. Hyde & Alias, Can. J. Bot. 74(9): 1489 (1996)
Diaporthomycetidae, Tirisporellales, Tirisporellaceae, Tirisporella
Index Fungorum number: IF27659; Facesoffungi number: FoF XXXX; 1 morphological species; 1 species with sequence data.
Saprobic on submerged substrates in freshwater or brackish habitats. Sexual morph: Ascomata solitary or gregarious, partially immersed to superficial, globose to subglobose, black, and coriaceous to carbonaceous, papillate, ostiolate, with a neck and periphyses. Peridium thick-walled, brown to black. Paraphyses early deliquescent, irregularly wide, septate, hyaline, tapering towards the apices and embedded in a mucilaginous matrix. Asci 8-spored, unitunicate, cylindrical to clavate, indistinctly pedicellate, apex with a J-, subapical ring. Ascospores uniseriate or bi-seriate to tri-seriate, hyaline to brown, 1–7-septate, fusoid, falcate to lunate, straight or curved, cell wall smooth or verrucose, with or without appendages. Asexual morph: Hyphomycetous. Conidiophores macronematous, mononematous, erect, pale brown to brown, paler toward the apex, straight or flexuous, smooth. Conidiogenous cells enteroblastic, monophialidic, integrated on hyphae, terminal, sometimes erect on hyphae, pale brown, subcylindrical, ampulliform. Conidia unicellular, hyaline, fusoid-ellipsoid, obovoid or ellipsoid, apex obtuse or broadly rounded, tapering to a truncate base, smooth-walled (adapted from Suetrong et al. 2015).
Type species: Tirisporella beccariana (Ces.) E.B.G. Jones, K.D. Hyde & Alias, in Jones, Hyde, Read, Moss & Alias, Can. J. Bot. 74(9): 1490 (1996)
Notes: The monotypic genus Tirisporella was introduced by Jones et al. (1996) to accommodate the type species T. beccariana (≡ Sphaeria beccariana), which was frequently encountered on intertidal petioles of Nypa fruticans (mangrove palm). This genus has historically been classified in the Loculoascomycetes incertae sedis, and Pleosporales incertae sedis because of the bitunicate-like asci (Jones et al. 2009), while the familial placement was confirmed and assigned into Sordariomycetes based on phylogenetic analysis (Suetrong et al. 2015). The most obvious characters of Tirisporella are the first basal septum delimiting a hyaline to light-coloured basal cell, the remaining cells brown and verrucose ascospores with apical appendages.