Chaetosphaerella E. Müll. & C. Booth, Trans. Br. mycol. Soc. 58(1): 76 (1972)
MycoBank number: MB 969; Index Fungorum number: IF 969; Facesoffungi number: FoF 01377; 2 species with sequence data.
Type species – Chaetosphaerella phaeostroma (Durieu & Mont.) E. Müll. & C. Booth
Notes – Chaetosphaerella was introduced by Müller & Booth (1972) and included two species, C. phaeostroma and C. fusca. The type species C. phaeostroma, is characterized by black ascomata surrounded by a subiculum, with tuberculate or roughened perithecia, clavate asci and pigmented ascospores. Sivanesan (1976) and Varghese & Rao (1979a) included C. fusispora and C. indica in Chaetosphaerella based on the characters, however, Réblová (1999a, b) excluded them based on different morphology of the peridium, setae, asci and conidiogenesis. Chaetosphaerella is closely related to Crassochaeta in Fig. 11.
Figure 11 – Phylogram generated from maximum likelihood analysis based on combined LSU, tef1 and ITS sequence data for Coronophorales. Related sequences are referred to Hongsanan et al. (2017). Seventy-nine strains are included in the combined analyses which comprised 2211 characters (1044 characters for LSU, 627 characters for tef1, 540 characters for ITS) after alignment. Members of Torpedosporales are used as outgroup taxa. Single gene analyses were carried out and the phylogenies were similar in topology and clade stability. The best RaxML tree with a final likelihood value of -23354.525618 is presented. Estimated base frequencies were as follows: A = 0.228019, C = 0.288494, G = 0.281955, T = 0.201533; substitution rates AC = 1.194725, AG = 2.787601, AT = 1.703067, CG = 0.955075, CT = 3.781057, GT = 1.000000; gamma distribution shape parameter a = 0.736138. Bootstrap support values for ML greater than 50% are given near the nodes. Ex-type strains are in bold. The newly generated sequences are indicated in blue.