Atrocalyx A. Hashim. & Kaz. Tanaka, Persoonia 39: 59 (2017).
MycoBank number: MB 819240; Index Fungorum number: IF 819240; Facesoffungi number: FoF 08286; 7 morphological species (Species Fungorum 2020), 7 species with molecular data.
Type species – Atrocalyx acutisporus A. Hashim. & Kaz. Tanaka., Persoonia 39: 59 (2017).
Notes – The genus was introduced to accommodate A. acutisporus (type) and A. lignicola. These two species have a crest-like, elongated, laterally compressed ostiolar neck. The peridium around the ostiolar neck and base is well developed. Species are reported as saprobes on woody plants.