Trichopeltina
Trichopeltina Theiss., Beih. bot. Zbl., Abt. 2 32: 3 (1914).
Index Fungorum number: IF 5566; Facesoffungi number: FoF 06204, 5 morphological species (Species Fungorum 2022), no molecular data available.
Epiphytes on leaves, appearing as “root”-like darkened areas. Thallus very thin, superficial, comprising neatly or irregularly arranged, angular or cylindrical to cuboid cells, with brown to dark brown walls. Sexual morph: Thyriothecia developing under thallus tissue, globose to subglobose, flattened, with a porate, central ostiole. Hamathecium usually lacking pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, clavate, short pedicellate or apedicellate, long pedicellate when immature in some species, apically rounded, sometimes with small ocular chamber or apical ring. Ascospores 2–3-seriate, long clavate, 1–3-septate, constricted at each septum, upper cells wider and shorter than lower cells, hyaline, sometimes pale brown in the lower cells, smooth-walled. Asexual morph: Unknown (adapted from Hongsanan et al. 2014).
Type species: Trichopeltina labecula (Mont.) Theiss.
Notes: Trichopeltina is characterised by globose to subglobose, flattened, thyriothecia, fissitunicate, clavate asci and 2–3-seriate, long clavate, 1–3-septate ascospores. Clements and Shear (1931) placed fossil material characterised by a thin thallus anduniseptate ascospores in Trichopeltina. Dilcher (1965) did not agree with Clements and Shear (1931) and did not consider the fossil in Trichopeltina. Hongsanan et al. (2014) re-examined the type specimen T. labecula and reported that the ascospores are 2−3-celled. Trichopeltina is a distinct genus in Trichopeltinaceae but molecular data is needed to verify the status of the genus.
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