Cryptosphaerella Sacc., Syll. fung. (Abellini) 1: 186 (1882)
MycoBank number: MB 1329; Index Fungorum number: IF 1329; Facesoffungi number: FoF; 18 morphological species (Species Fungorum 2020), 6 species with sequence data.
Type species – Cryptosphaerella nitschkei (Auersw.) Sacc.
Notes – Cryptosphaerella has multi-spored asci with allantoid ascospores (Saccardo 1882). This genus was considered as a synonym of Coronophora (Nannfeldt 1975) or a member of Coronophoraceae (Subramanian & Sekar 1990). It was clarified as an independent genus of Scortechiniaceae based on multi-gene analysis (Mugambi & Huhndorf 2010). The monophyletic Cryptosphaerella is closely related to Biciliospora, Scortechiniella and Scortechiniellopsis (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.
Species
Cryptosphaerella nitschkei