Hypotrachyna yunnana, 2020

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 : 200

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

Phytotaxa 132 (1): 31 (2013).

SELECTED MATERIALS EXAMINED. — China, Yunnan Prov.: Dali Ci., Cangshan Mt; 25°34’N, 100°13’E; 3750 m, on bark; 22.X.2002; J. C. Wei WY203 (HMAS– Neotype, selected in Chen et al. 2015); Cangshan Mt, TV station; 25°41’144”N, 100°6’7”E; 2800 m, on Pinus bark; 22.X.2002; L. S. Wang 02-22486; Nanjian Co., Dazhong Mt; 24°50’15.30”N, 100°25’16.50”E; 2750 m, on bark; 20.XII.2012; L. S. Wang 12-37774.

NOTES

For a detailed description, see Jiang & Wei (1993).

This species is characterized by containing diffractaic acid, which is unique among the known Everniastrum species. The species has been reported from only Yunnan Province. Diffractaic acid was not found in our specimens (45 specimens – some of them are listed under H. nepalensis , H. sinensis and H. yunnana Xin Y.Wang & Li S.Wang , sp. nov.) collected from the type locality (Dali Ci., Cangshan Mt), and we suppose that two chemotypes exist in Yunnan, a rare type with additional diffractaic acid and a more common type with atranorin and protolichesterinic and salazinic acids.

Apart from its chemical composition, this species can be distinguished by its large ascospores (up to 32 µm long), apothecia growing on the terminal part of the lobes, with a distinct rugose podetium, and long marginal cilia (up to 2.5 mm long).