Riomyces A. Ferrer, A.N. Mill., Sarmiento & Shearer, Mycologia 104(4): 876 (2012)
MycoBank number: MB 561099; Index Fungorum number: IF 561099; Facesoffungi number: FoF 13117; 1 species with sequence data.
Type species – Riomyces rotundus A. Ferrer, A.N. Mill., Sarmiento & Shearer
Notes – Riomyces was introduced by Ferrer et al. (2012) to accommodate a single species R. rotundus, based on morphology and phylogenetic analyses of LSU sequence data. It was found on submerged decaying wood in freshwater in Costa Rica (Fig. 3).
Figure 3 – Phylogram generated from maximum likelihood analysis based on combined LSU, SSU, ITS and rpb2 sequence data of Diaporthomycetidae. One hundred and ninety-three strains are included in the combined analyses which comprised 3545 characters (859 characters for LSU, 972 characters for SSU, 659 characters for ITS) after alignment. Single gene analyses were carried out and the topology of each tree had clade stability. Tree topology of the maximum likelihood analysis is similar to the Bayesian analysis. The best RaxML tree with a final likelihood value of – 68207.368884 is presented. Estimated base frequencies were as follows: A = 0.248206, C = 0.241993, G = 0.285500, T = 0.224301; substitution rates AC = 1.369088, AG = 2.887040, AT = 1.413053, CG = 1.152137, CT = 6.303994, GT = 1.000000; gamma distribution shape parameter a = 0.315782. Bootstrap support values for ML greater than 75% and Bayesian posterior probabilities greater than 0.95 are given near the nodes. The tree is rooted with Diatrype disciformis (AFTOL-ID 927). Ex-type strains are in bold. The newly generated sequences are indicated in blue.