Trematophoma Petr., Annls mycol. 22(1/2): 152 (1924)
Ascomycota, genera incertae sedis
Saprobic on dead wood lying in water. Sexual morph: undetermined. Asexual morph: Conidiomata dark brown to black, pycnidial, solitary, semi-immersed, globose to elongated, unilocular, glabrous. Ostiole single, circular, centrally located. Conidiomatal wall composed of thick-walled, pale brown to hyaline cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells arising from inner wall layers of conidiomata, hyaline, enteroblastic, phialidic, cylindrical to lageniform, indeterminate, smooth-walled, often percurrently proliferating. Conidia hyaline, broadly obovoid, rounded at the apex, truncate at the base, with one central guttule (adapted from Sutton 1980).
Type species: Trematophoma lignicola Petr., Annls mycol. 22(1/2): 152 (1924)
Notes: Trematophoma is similar to the asexual morph of Abrothallus (= Vouauxiomyces) and Lichenoconium, but differs from the latter two genera in several features, such as the shape, colour, septa and surface structure of the conidia (Hawksworth and Dyko 1979, Pérez-Ortega et al. 2001). In Trematophoma, the conidia are hyaline, broadly obovoid, aseptate, and smooth-walled; in the asexual morph of Abrothallus, the conidia are hyaline to pale yellowish, clavate to pyriform, aseptate, almost smooth-walled, and invested in part in a mucilaginous matrix; in Lichenoconium the conidia are brown, obpyriform to obovate, 1-septate, and verrucose (Hawksworth and Dyko 1979, Nag Raj and DiCosmo 1980). Trematophoma is monotypic and no molecular data is available. Fresh collections of type are needed to place Trematophoma in a natural group.
Distribution: Austria (Sutton 1980).
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.