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New molecular data on Pyrenulaceae from Sri Lanka reveal two well-supported groups within this family

Published online by Cambridge University Press:  24 August 2012

Gothamie WEERAKOON
Affiliation:
Department of Botany, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka
André APTROOT
Affiliation:
ABL Herbarium, Gerrit van der Veenstraat 107, NL–3762 XK Soest, The Netherlands
H. Thorsten LUMBSCH
Affiliation:
The Field Museum, Department of Botany, 1400 S Lake Shore Drive, Chicago, IL 60605, USA
Patricia A. WOLSELEY
Affiliation:
The Natural History Museum, Department of Botany, Cromwell Road, London, SW7 5BD, UK. Email: c.gueidan@nhm.ac.uk
S. Chandrani WIJEYARATNE
Affiliation:
Department of Botany, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka
Cécile GUEIDAN*
Affiliation:
The Natural History Museum, Department of Botany, Cromwell Road, London, SW7 5BD, UK. Email: c.gueidan@nhm.ac.uk

Abstract

Pyrenulaceae is one of the dominant lichen families in the tropics, especially in lowland evergreen forests. Although very species-rich, phylogenetic relationships within Pyrenulaceae have not been extensively studied using molecular data, and its morphology-based generic delimitation remains untested. A recent lichenological survey carried out in the Knuckles Mountain Range in Sri Lanka allowed the first author to collect fresh specimens of different species of Pyrenula, and to investigate the phylogenetic relationships within the family Pyrenulaceae using a multigene analysis (ITS, nuLSU and mtSSU) and a preliminary dataset of 21 taxa. This data shows that the family Pyrenulaceae can be divided into two well-supported groups and suggests that the genus Pyrenula is not monophyletic. Characters usually used for generic classification in this family (ascospore colour and septation, structure of the ascospore locules, secondary chemistry, hamathecium structure, ostiole position) do not correlate with these two groups. However, the presence of pseudocyphellae is restricted to species of Pyrenula from one group.

Type
Research Article
Copyright
Copyright © British Lichen Society 2012

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