Phaeocryptopus Naumov, Bull. Soc. mycol. Fr. 30(1): 424 (1915).
MycoBank number: MB 3902; Index Fungorum number: IF 3902; Facesoffungi number: FoF 00086; 6 morphological species (Species Fungorum 2020), 2 species with molecular data.
Type species – Phaeocryptopus nudus (Peck) Petr., Annls mycol. 36(1): 15 (1938).
Notes – Phaeocryptopus was introduced as a monotypic genus. Petrak (1962), Butin (1970) and Farr (1984) introduced several other species (Thambugala et al. 2014a). Müller & von Arx (1950) included Phaeocryptopus in Venturiaceae. Rhizosphaera species are accepted as asexual morphs of Phaeocryptopus. However, this relationship has not been clearly established (Winton et al. 2007, Thambugala et al. 2014a). Phylogenetic analysis of Winton et al. (2007) and Schoch et al. (2009a) showed that P. gaeumannii clustered in Mycosphaerellaceae, Capnodiales while P. nudus nested in Dothioraceae, Dothideales (Thambugala et al. 2014a). In our multi-gene phylogenetic analysis, P. nudus is separated with high bootstrap support with its internal node (94 % MLBS, 0.99 PP, Fig. 27) within family Dothideaceae. Phaeocryptopus is separated from other genera in the family in having superficial, gregarious, globose to globose-depressed, black ascostromata (Thambugala et al. 2014a).
Figure 27 – Phylogram generated from maximum likelihood analysis (RAxML) of Dothideales based on ITS, LSU and SSU sequence data. Maximum likelihood bootstrap values equal or above 70 %, Bayesian posterior probabilities equal or above 0.90 (MLBS/PP) are given at the nodes. An original isolate number is noted after the species name. The tree is rooted to Elsinoe phaseoli (CBS 165.3), E. veneta (AFTOL-ID 1853), Myriangium duriaei (AFTOL-ID 1304), and M. hispanicum (CBS 247.33). The ex-type strains are indicated in bold. Hyphen (-) represents support values below 70 % MLBS and 0.90 PP.