Jattaea Berl., Icon. fung. (Abellini) 3(1-2): 6 (1900)

MycoBank number: MB 2528; Index Fungorum number: IF 2528; Facesoffungi number: FoF 07774; 26 morphological species (Species Fungorum 2020), 11 species with sequence data.

Type species – Jattaea algeriensis Berl.

Notes – Jattaea has long-necked ascomata containing hyaline, cylindrical paraphyses, branched ascogenous hyphae, clavate asci and oblong to subglobose ascospores. The asexual morph has always been referred to phialophora-like (Damm et al. 2008). The monophyletic Jattaea is related to Calosphaeria and Togniniella within Calosphaeriaceae based on multi-gene analysis (Réblová et al. 2015b; Fig. 7).

Figure 7 – Phylogram generated from maximum likelihood analysis based on combined tub2, act, ITS and LSU sequence data of Calosphaeriales, Togniniales, Jobellisiales and Tirisporallales. One hundred and fifteen strains are included in the combined analyses which comprised 2296 characters (572 characters for tub2, 269 characters for act, 586 characters for ITS, 869 characters for LSU) after alignment. Three species of Ophiostomataceae are used as outgroup taxa. Single gene analyses were also carried out and the phylogenies were similar in topology and clade stability. The best RAxML tree with a final likelihood value of -29642.219830 is presented. Estimated base frequencies were as follows: A = 0.222849, C = 0.289953, G = 0.265413, T = 0.221786; substitution rates AC = 1.361161, AG = 3.471108, AT = 1.335451, CG = 1.139165, CT = 4.985065, GT = 1.000000; gamma distribution shape parameter a = 1.412987. Bootstrap support values for ML greater than 60% are given near the nodes. Ex-type strains are in bold. The newly generated sequences are indicated in blue.

Figure 53 – Jattaea discreta (Material examined – ITALY, Belluno, Veneta, on the bark of branches, Autumn 1879, NY no.00986029, isotype). a Material label. b Ascomata. c Ascoma in cross section. d Peridium. e Asci and paraphyses attached to ascogenous hyphae with ellipsoid to obpyriform cells (arrow head indicates ascogenous hyphae). f, g Asci. h-l Ascospores. Scale bars: b = 500 µm, c = 200 µm, d = 50 µm, e = 20 µm, f, g = 10 µm, h-l = 5 µm.

Species