Asterinales » Asterinaceae

Gangamyces

Gangamyces Hosag., in Hosagoudar, Mycosphere 3['2’] (5): 778 (2012).

Index Fungorum number: IF 800999; Facesoffungi number: FoF 13903, 2 morphological species (Species Fungorum 2022), molecular data unavailable.

Colonies epiphyllous on leaves. Superficial hyphae dark brown, septate, flexuous, with appressoria lateral in opposite couplets with a stellate lumen in the attached mycelial cell. Sexual morphThyriothecia superficial, orbicular, scattered or gregarious black, orbicular with radiating cells, astomatous, dehisce stellately at the center. Asci 8-spored, bitunicate, globose. Ascospores oblong to cylindrical, conglobate, dark brown to brown, 1-septate, constricted at the septum. Asexual morphConidia globose, numerous pyriform, aseptate, often readily germinating (adapted from Hosagoudar 2012).

Type species: Gangamyces miliusae Hosag. & Archana

Notes: Gangamyces is characterized by superficial, orbicular thyriothecia, bitunicate, globose asci and oblong to cylindrical, conglobate 1-septate ascospores. Gangamyces resembles Asterina in having orbicular thyriothecia, apparent hyphae with appressoria, globose asci and conglobate brown 1-septate ascospores. Gangamyces differs from Asterina in having disparately borne appressoria with a radial lumen unremitting with the parent hyphal cell (Hosagoudar 2012, Marasinghe et al. 2023). Hawksworth (2012) and Hongsanan et al. (2014) considered Gangamyces as a synonym of Asterina. Marasinghe et al. (2023) treated Asterina as a distinct genus in Asterinaceae based on the oppositely borne appressoriate hyphae.Fresh collections and sequence data are needed to confirm the placement of Gangamyces.

 

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