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Heppia arenacea and Lempholemma polycarpum, two new species from southern Yemen and Socotra

Published online by Cambridge University Press:  16 May 2005

M. SCHULTZ
M. SCHULTZ
Affiliation:
Biozentrum Klein Flottbek der Universität Hamburg, Ohnhorststr. 18, D-22609 Hamburg, Germany
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Abstract

Heppia arenacea M. Schultz and Lempholemma polycarpum M. Schultz are described as new and placed in the Lichinaceae. Heppia arenacea occurs in soil-crust communities in southern Yemen and on Socotra. It colonizes both calcareous soil-crusts over limestone as well as soils originating from basaltic rocks. The sand-coloured, squamulose thallus, the erumpent, dark red apothecia and the incorporation of soil material into the thallus are diagnostic characters. Lempholemma polycarpum occurs on inclined limestone boulders in south-eastern Yemen. It is characterized by an umbilicate-lobate thallus with radiating, tongue-shaped, furcate lobes which bear numerous, small, immersed apothecia with punctiform discs.

Keywords

lichenized cyanobacteriumLichinaceaesoil-crusts
Type
Research Article
Information
The Lichenologist , Volume 37 , Issue 3 , May 2005 , pp. 227 - 235
Copyright
© British Lichen Society 2005

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