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A new species of Micarea (Pilocarpaceae) from Madeira growing on Usnea

Published online by Cambridge University Press:  12 May 2014

Pieter P. G. VAN DEN BOOM
Affiliation:
Arafura 16, NL-5691 JA Son, The Netherlands. Email: pvdboom@kpnmail.nl
Damien ERTZ
Affiliation:
National Botanic Garden, Domaine de Bouchout, B-1860 Meise, Belgium

Abstract

The new species Micarea usneae is described from Madeira. It has been found at two localities where it grew on epiphytic Usnea thalli. Micarea usneae is distinguished by a very thin pale brownish thallus, pallid to greyish black or bluish subglobose apothecia of 0·1–0·3 mm diameter, very narrow (1·5–2·5 µm) ascospores, black pycnidia and strongly curved to sigmoid macroconidia. Phylogenetic analyses using mtSSU sequences place the new species in the Micarea peliocarpa group. Catillaria usneicola and Cladonia parasitica are recorded for the first time from Madeira. A key to the lichenicolous species on Usnea in Macaronesia is provided.

Type
Articles
Copyright
Copyright © British Lichen Society 2014 

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