Nephromopsis laureri (Kremp.) Kurok.

Nomenclatural data
J. Jap. Bot. 66: 156, 1991. – Cetraria laureri Kremp., Flora 34: 673, 1851. – Cetraria complicata Laurer, in Fries, Lichenogr. Eur. Ref. 459, 1831 (nom. nud.). – Platysma complicatum (Laurer) Nyl., Syn. Lich. 1: 303. 1860 (nom. inval.). – Cetraria straminea Kremp. ex Schwend. in Nägeli, Beitr. Wiss. Bot. (Leipzig) 2: 154, 1860. – Tuckneraria laureri (Kremp.) Randlane & A. Thell, Acta Bot. Fenn. 150: 149, 1994.
Morphology
Description – see Randlane et al. (1994).
Typical characters. Thallus dorsiventral, pale yellow on the upper surface and white to pale brown on the lower surfce, with marginal whitish soredia and scattered cilia. Lower surface with small pseudocyphellae. Medulla white, Pd-.
Chemistry
Contains usnic acid in the cortex; lichesterinic and protolichesterinic acids in the medulla.
Remarks
A taxon which had earlier been confused with another sorediate cetrarioid lichen Allocetraria oakesiana. These two species are morphologically somewhat similar as both have rather small yellow dorsiventral thalli and the marginal soralia. However, these taxa are distinct both anatomically (filiform pycnoconidia in A. oakesiana, bifusiform pycnoconidia in T. laureri) and chemically (occurence of caperatic acid and occasionally also secalonic acid in A. oakesiana). The careful investigation of the lower surface reveals small pseudocyphellae in T. laureri but never in A. oakesiana. A. oakesiana is widely distributed in North America and Europe but occurs just occasionally in Asia (China, Nepal, Russia).
Ecology and distribution
A very extensively distributed taxon in different parts of the world: in montane forests of many countries in Central Europe – Austria, Germany, Italy, Poland, Romania, Slovakia, Switzerland, Ukraine; in Asia – Bhutan, China, India, Japan, Mongolia, Nepal, Russia; in South-America – Colombia, Venezuela. In China it is known from Sichuan and Xizang provinces. Corticolous on coniferous (Abies, Juniperus, Picea, Pinus) and deciduous (Betula, Hippophae, Lonicera, Quercus, Prunus, Rhododendron, Salix, Sorbus) trees or lignicolous at altitudes 2400–5100 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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