Hypotrachyna rhizodendroidea (J.C.Wei & Y.M.Jiang) Divakar, A.Crespo, Sipman, Elix & Lumbsch

Wang, Xin Yu, Zhang, Yan Yun, Liu, Dong, Li, Li Juan, Yang, Mei Xia, Yin, An Cheng & Wang, Li Song, 2020, Taxonomic study of Hypotrachyna subg. Everniastrum (Hale ex Sipman) Divakar, A. Crespo, Sipman, Elix & Lumbsch (Ascomycota) from China, Cryptogamie, Mycologie 20 (12), pp. 193-209 : 204

11. Hypotrachyna rhizodendroidea (J.C.Wei & Y.M.Jiang) Divakar, A.Crespo, Sipman, Elix & Lumbsch

Phytotaxa 132 (1): 32 (2013).

SELECTED SPECIMENS EXAMINED. — China, Xizang Prov., Nyalam Co., Quxiang Vil.; 28°6’5.115”N, 85°34’11.99”E; 3740 m, on shrubs; 1.V.1966; J. C. Wei 762 (holo-, HMAS[HMAS]); Nyalam Co., Boquhe River; 28°6’5.115”N, 85°34’11.99”E; 3650 m, on Rhododendron bark; 14.VI.1996; J. C. Wei 1555-1 (HMAS).

NOTES

For a detailed description, see Wei & Jiang (1982).

This species can be separated from all other known species of Everniastrum by its special cilia type – short, thick, fruticose, irregularly and richly branched ( Fig. 5A ), the lower surface covered with sparse rhizines, and atranorin and salazinic acid as the main compounds. It was first reported from Xizang Province and usually grows on shrubs at elevations of 2300 - 3800 m. However, no specimens examined in this study, including those collected from the type locality, had exactly the same morphological characters as the type specimen. The phylogenetic analysis also supported this view ( Fig. 1 ): our specimens (GenBank Nos: MN335186, MN335188) with branched cilia were clustered within the H. nepalensis clade, indicating that these specimens with branched cilia were not

H. rhizodendroidea . The concept of this species needs further study with fresh material having the proper type of cilia from the type locality.

Figures

FIG. 5. — Type specimens showing special characters:A, Hypotrachyna rhizodendroidea (J.C.Wei & Y.M.Jiang) Divakar,A.Crespo,Sipman,Elix & Lumbsch showing short, thick and irregularly branched cilia (J. C. Wei 762, HMAS); B, H. sinensis (J.B.Chen & J.C.Wei) Divakar, A.Crespo, Sipman, Elix & Lumbsch showing lobules on the upper surface (J. B. Chen 10488, HMAS);C, H. subsorocheila (Y.M.Jiang & J.C.Wei) Divakar, A.Crespo,Sipman,Elix & Lumbsch showing granulose soralia (J. C. Wei 9247, HMAS); D, H. vexans (Zahlbr. ex W.L.Culb. & C.F.Culb.) Divakar, A.Crespo, Sipman, Elix & Lumbsch showing short and granulose isidia on the upper surface (Asahina 79, W). Scale bar: A, B, D, 1 mm; C, 2 mm.

FIG. 1. — Phylogenetic tree generated from maximum likelihood (ML) analysis based on ITS sequence data. ML bootstrap support values greater than 70% and Bayesian posterior probabilities (PPs) greater than 0.95 are given above the nodes. New species are indicated in bold. “TYPE” refers to the sequences of types, “TOPO” for specimens that come from the type locality. Scale bar: 0.02 substitutions.