Immotthia M.E. Barr, Mycotaxon 29: 504 (1987).

MycoBank number: MB 25106; Index Fungorum number: IF 25106; Facesoffungi number: FoF 08362; 2 morphological species (Species Fungorum 2020), molecular data unavailable.

Type speciesImmotthia hypoxylon (Ellis & Everh.) M.E. Barr, Mycotaxon 29: 504 (1987).

Amphisphaeria hypoxylon Ellis & Everh., J. Mycol. 2(4): 41 (1886).

Current name: Immotthia atrograna (Cooke & Ellis) M.E. Barr, Mycotaxon 46: 71 (1993).

Notes – Barr (1987) introduced the monotypic genus Immotthia to accommodate a hyperparasitic ascomycete, Amphisphaeria hypoxylon as Immotthia hypoxylon occurring on Hypoxylon species, or forms compressed ascostromata on decorticated wood. The genus is characterized by small to medium sized, globose to subglobose ascomata on blackened hypostroma, with unequal thickness peridium, fissitunicate, cylindrical asci, 1-seriate, brown to reddish brown, ellipsoidal to fusiform, 1-septate ascospores and coelomycetous asexual morph, with brown, ellipsoidal, aseptate conidia (Hyde et al. 2017). Immotthia was previously treated in Dacampiaceae and Teichosporaceae (Barr 1987a, 2002, Jaklitsch & Scheuer 2002, Zhang et al. 2012b, Akulov & Hayova 2016). However, Hyde et al. (2017) studied the type specimen and other collection of I. hypoxylon (≡ Amphisphaeria hypoxylon) and treated the genus in Roussoellaceae and this was followed by Doilom et al. (2018). However, the phylogenetic affinity of this genus needs to be confirmed with molecular data of the type species.


  • Immotthia hypoxylon