Nephromopsis isidioidea (Räsänen) Randlane & Saag
Nomenclatural data
Mycotaxon 44: 487, 1992.
Basionym: Cetraria wallichiana var. isidioidea Räsänen, Arch. Soc. Zool. Bot. Fenn. Vanamo 5, 1: 25, 1950. Type: India, E. Himalayas (West Bengal), Darjeeling Distr., Rimbick to Sandakhpoo, alt. 9000 ft., Awasthi, June 1948, no. 179 (H, holotype!). Synonym: Cetraria isidioidea (Räsänen) D. D. Awasthi, Bull. Bot. Surv. India 24: 10, 1982.
Thallus foliose, ca. 5,5 cm in diameter, with lobes 1-2 cm wide; upper surface yellowish grey, strongly rugose; medulla yellow to ochraceous; lower surface dark brown to black, strongly rugose and reticulated, with special plug-like outgrowths. Rhizines absent, possibly broken from the outgrowths. White small pseudocyphellae situated on ridges and outgrowths of the lower side. Pycnidia mainly laminal but also marginal, located on numerous black emergent projections. Pycnoconidia bifusiform, 5 x 1,5 µm. Apothecia not seen.
Usnic acid in the cortex; secalonic acid C and fatty acids (lichesterinic and protolichesterinic acids) in the medulla. Medulla K+ reddish.
The taxonomic status of N. isidioidea is not definitely clear, it is probably closely related to the other two species with coloured medulla, especially to N. ornata from which it differs in the more rugose and reticulated thallus, lack of rhizines and apothecia.
Ecology and distribution
Known only from the type collection from India, East Himalaya, West Bengal, at altitude of about 2700 m; on a dead tree stump.
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.