Candolleomyces rubrobrunneus

Yang, Kun L., Lin, Jia Y., Li, Guang-Mei & Yang, Zhu L., 2025, Introducing one new genus and two new species of Psathyrellaceae (Basidiomycota, Agaricales), with notes on Candolleomyces and Ephemerocybe, Phytotaxa 702 (1), pp. 1-28 : 16

(3.6) Candolleomyces rubrobrunneus complex

Notes:— In the ITS-only phylogeny ( Fig. 4B ), five collections of ours and the holotype collection of Candolleomyces rubrobrunneus established a rather heterogenous monophyletic group without significant support. In the four-locus phylogeny ( Fig. 4A ), only five of our collections with complete four-locus data were analysed for this group, and they formed a distinct, homogenous monophyletic group with significant support. This group is referred to as the Candolleomyces rubrobrunneus complex in this study, characterized by basidiomata that are usually either solitary or caespitose, with a reddish-brown pileus and a terrestrial habit. More collections are required to confirm the species number in this complex.

Legitimately proposed species recognized in this complex:— Cd. rubrobrunneus Nayana & C.K Pradeep (2024, holotype sequenced).

Collections sequenced in this study:— China, Guangdong Province, Guangzhou City, elevation 5–30 m, 2023, Jia Y. Lin & Kun L. Yang, K23258 ( HTBM0773 ), L2344 ( HTBM0877 ), L23426 ( HTBM1407 ), L23428 ( HTBM1409 ), and L23468 ( HTBM1449 ).

Figures

FIGURE 4. Phylogeny of Candolleomyces inferred from concatenated ITS-nrLSU-tef-1α-β-tub alignment (A; all samples with sequence data complete in the four loci) or ITS alignment (B). Nodes are annotated if supported by ≥50% MLB or ≥0.9 BPP. Branches shortened to fit the page are indicated by two diagonal lines, followed by the number of times shortened. Collections sequenced in this study are highlighted in gold. Holotypes, epitypes, and neotypes are indicated by HT, ET, and NT, respectively. Photos and line drawings of our collections, and species delimitation results are attached.