Leotiomycetes, Leotiomycetidae, Helotiales, Lachnaceae
Saprobic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata stromatic, acervular, solitary to gregarious, immersed at first, eventually erumpent, rounded in outline. Conidiomatal wall composed of textura globulosa to textura prismatica with thick-walled, pale brown to hyaline cells at basal part, surrounding by a sheath of sterile hyphae. Sterile hyphae pale brown to hyaline, cylindrical, unbranched, septate, smooth-walled. Conidiophores arising from the upper layers of basal wall, hyaline, short, branched or unbranched, septate, smooth-walled. Conidiogenous cells hyaline, subcylindrical to clavate, discrete or integrated, proliferating sympodially to a limited extent. Conidia hyaline, tetra-radiate, occasionally tri-radiate; main axis subcylindrical to clavate, aseptate or 1-euseptate, smooth-walled, bearing a short, excentric, attenuated appendage; arms two or four, subcylindrical, attenuated, aseptate or 1-septate, arising at the apex of the main axis from different loci and delimited from it by septa.
Type species: Crucellisporium selaginellae M.L. Farr, in Farr & Horner, Nova Hedwigia 15: 264 (1968)
Notes: Crucellisporium selaginellae was collected from leaves of Selaginella rupestris (Selaginellaceae) in the USA (Farr and Horner 1968). Nag Raj (1974) revised the genus and provided a description and illustration for the type species. Sutton (1980) regarded Crucellisporium as a synonymy of Belaina Bat. & Peres. However, Belaina was reduced to synonym of Polynema Lév. based on type studies (Nag Raj and Kendrick 1978). They described an additional species C. africanum Nag Raj from the leaves of Dalbergia lactea (Fabaceae) in Tanzania. Marincowitz et al. (2010) introduced the third species C. umtamvunae Marinc., Gryzenh. & M.J. Wingf. and showed that Crucellisporium belongs to Helotiales (Leotiomycetes). Ekanayaka et al. (2019) listed Crucellisporium as a member of Lachnaceae (Helotiales). The sequence of C. selaginellae is not available. Hence, new collections from type material location are needed and subjected to DNA analysis to confirm its placement.
Distribution: South Africa, Tanzania, USA (Farr and Horner 1968, Nag Raj 1993).
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.