Hysterodifractum D.A.C. Almeida, Gusmão & A.N. Mill., gen. nov. MycoBank MB 807155 Hysterodifractum differs from all other genera in the Hysteriaceae in having ascospores that disarticulate into part-spores when mature. Type species:— Hysterodifractum partisporum D.A.C. Almeida, Gusmão & A.N. Mill. Etymology:—From Latin Hystero - referring to the hysterothecium type of ascomata, and difractum, referring to the ascospores disarticulating into part-spores. Hysterothecia superficial, black, carbonaceous, navicular, straight or sometimes flexuous, with a longitudinal slit, smooth or slightly striated laterally, gregarious, lying at irregular angles. Pseudoparaphyses hyaline, apically branched, forming an epithecium above the asci. Asci bitunicate, cylindrical, 8-spored, uniseriate to irregularly biseriate. Ascospores pale brown, fusiform, smooth, disarticulating into part-spores.

Published as part of Almeida, Davi Augusto Carneiro De, Gusmão, Luís Fernando Pascholati & Miller, Andrew Nicholas, 2014, A new genus and three new species of hysteriaceous ascomycetes from the semiarid region of Brazil, pp. 298-308 in Phytotaxa 176 (1) on page 304, DOI: 10.11646/phytotaxa.176.1.28, http://zenodo.org/record/5144481