Nephromopsis ahtii (Randlane & Saag) Randlane & Saag

Nomenclatural data
Mycol. Progress 4(4): 311, 2005. – Tuckneraria ahtii Randlane & Saag, Acta Bot. Fenn. 150: 147, 1994. – Type: China, Prov. Yunnan, Lijiang County, Mt. Yulongshan, lower central E slope, Ganheba, 3200–3300 m, 27°06’N 100°14’E, on Abies, 23.04.1987, T. Ahti, J. B. Chen & L. S. Wang 46 649 (H! – holotype, TU! – isotype)
Morphology
Description – see Randlane et al. (1994).
Typical characters. Thallus dorsiventral, upper surface yellowish grey, lower surface pale to dark brown. Lobes rather narrow (4–10 mm wide). Marginal cilia may be present. Pycnoconidia bifusiform (5 x 1–1,5 µm). Ascospores subglobose (5–7 x 4–5 µm).
Chemistry
Contains usnic acid (±) in the cortex; lichesterinic, protolichesterinic, caperatic (±) and occasionally other unidentified fatty acids in the medulla.
Remarks
A taxon which is not easily distinguished by morphology alone, but by the shape of both ascospores and pycnospores.
Ecology and distribution
Distributed in Bhutan, China – in Sichuan, Taiwan, Xizang and Yunnan provinces – and Nepal (Randlane et al. 1994). Corticolous on coniferous (Abies, Juniperus, Picea) and deciduous (Hippophae, Salix) trees or shrubs (Rhododendron) in mountain forests at the altitude 3200–4500 m.
Literature
Randlane, T. & Saag, A. 1992. | Randlane, T. & Saag, A. 1998. |Randlane, T. & Saag, A. 2004. | Randlane, T., Saag, A. & Obermayer, W. 2001. | Randlane, T., Saag, A., Thell, A. & Kärnefelt, I. 1994. | Randlane, T., Thell, A., & Saag, A. 1995. | Thell, A., Randlane, T., Saag, A. & Kärnefelt, I. 2005.
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