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6 August 2013 A new lichenicolous lichen from Europe and western North America in the genus Dimelaena (Physciaceae)
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Abstract

Dimelaena lichenicola is a juvenile parasite on D. oreina and D. thysanota, developing an independent brown areolate lichenized thallus on gneiss and acid rock. It differs from D. californica primarily in producing longer conidia (6.0–10.0 × 1.0 vs. 5.0–6.0 × 1.0 µm), having a reduced thallus and minute lobes, lacking a well-developed plicate margin and a prothallus, having a different host species (D. oreina and D. thrysanota vs. D. radiata), and a different habitat (montane vs. coastal). It is reported from North America (California) and Europe (Italy).

The American Bryological and Lichenological Society, Inc.
Kerry Knudsen, John W. Sheard, Jana Kocourková, and Helmut Mayrhofer "A new lichenicolous lichen from Europe and western North America in the genus Dimelaena (Physciaceae)," The Bryologist 116(3), 257-262, (6 August 2013). https://doi.org/10.1639/0007-2745-116.3.257
Received: 13 May 2013; Accepted: 1 July 2013; Published: 6 August 2013
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