Mamillisphaeria K.D. Hyde et al., Nova Hedwigia 62(3-4): 514 (1996).
MycoBank number: MB 27612; Index Fungorum number: IF 27612; Facesoffungi number: FoF 00772; 1 morphological species (Species Fungorum 2020), molecular data unavailable.
Type species – Mamillisphaeria dimorphospora K.D. Hyde et al., Nova Hedwigia 62(3-4): 515 (1996).
Notes – Mamillisphaeria was introduced as a monotypic genus with bitunicate, fissitunacate asci, trabeculate pseudoparaphyses and dimorphic ascospores collected from freshwater in tropical Australia. Hyde et al. (1999) discussed the different function between two kinds of ascospores. The hyaline ascospores may be adapted for attachment, enhanced collision and provide nutrient for germination (Hyde et al. 1996, Zhang et al. 2012b), and the brown ascospores cannot germinate may help withstand desiccation and UV radiation during aerial dispersal (Hyde et al. 1996, Zhang et al. 2012b, Tian et al. 2015). Both ascospores have mucilaginous sheaths (Hyde et al. 1996, Tian et al. 2015). Barr (1990a) assigned Mamillisphaeria dimorphospora to Massariaceae, however, based on account of the trabeculate pseudoparaphyses, Hyde et al. (1999) temporarily assigned this species to Melanommataceae, there is no molecular data published for Mamillisohaeria, Tian et al. (2015) followed the conclusion and retained, Mamillisohaeria in Melanommataceae.