Tainosphaeriella Réblová & Hern.-Restr., gen. nov.

MycoBank number: MB 842003; Index Fungorum number: IF 842003; Facesoffungi number: FoF;

Type species: Tainosphaeriella aquatica (X.D. Yu, C.X. Li & H. Zhang) Réblová & Hern.-Restr.

Etymology: Tainosphaeria and –ella (L) diminutive but here used as a name-forming suffix, referring to fungi morphologically similar to Tainosphaeria.

Colonies on natural substrate effuse, pale to dark brown, mycelium partly superficial, partly immersed. Anamorph: Setae absent. Conidiophores macronematous, mononematous, single, erect, straight or slightly flexuous, unbranched, septate, smooth, brown, paler toward the apex. Conidiogenous cells integrated, terminal, phialidic; collarettes flared, campanulate. Conidia falcate, cylindrical to fusiform or ellipsoidal-fusiform, slightly curved, transversely septate, hyaline, occasionally laurel green at maturity, with a straight or gently curved setula at each end, conidia accumulate in slimy whitish or ochre fascicles. (Adapted after Li et al. [192]). Teleomorph: Unknown.

Habitat and geographical distribution: Members of Tainosphaeriella occur on sub- merged decaying wood and are only known from Southeast Asia, Thailand [192].

Notes: – The genus Tainosphaeriella (Ta.) is described for two species with 1–3-septate, setulate conidia borne on monophialidic conidiogenous cells with campanulate to almost disk-like collarettes and unbranched conidiophores. Originally, they were placed in Tainosphaeria by Li et al. [192], but molecular data do not support such relationship. In the present phylogenetic analysis, the two species are unrelated to Tainosphaeria crassiparies, the type species, and other species of Tainosphaeria. Instead, they grouped as a sister clade to Phialogeniculata guadalcanalensis and Phialoturbella spp. Two Dictyochaeta species, D. macrospora and D. variabilis [23,24] resemble Tainosphaeriella. Both species are native to Malaysia and are found on submerged leaves or decaying palm fronds in terrestrial environments. Unfortunately, their living cultures or DNA sequences are not available for study.

Species