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Three new species of Chapsa (lichenized Ascomycota: Ostropales: Graphidaceae) from tropical Asia

Published online by Cambridge University Press:  29 March 2012

Gothamie WEERAKOON
Affiliation:
Department of Botany, University of Sri Jayawardenepura, Nugegoda, Sri Lanka.
Eimy RIVAS PLATA*
Affiliation:
Department of Botany, The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605-2496, USA. Email: erivasplata@fieldmuseum.org Department of Biology, Duke University, Durham, North Carolina 27708-0338, USA.
H. Thorsten LUMBSCH
Affiliation:
Department of Botany, The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605-2496, USA. Email: erivasplata@fieldmuseum.org
Robert LÜCKING
Affiliation:
Department of Botany, The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605-2496, USA. Email: erivasplata@fieldmuseum.org

Abstract

Three new species of Chapsa in the family Graphidaceae are described from tropical Asia. Chapsa mastersonii Rivas Plata, Lumbsch & Lücking from the Philippines is characterized by large apothecia with thickly white-pruinose discs, large, muriform, non-amyloid ascospores, and the stictic acid chemosyndrome. Chapsa wijeyaratniana Weerakon, Lumbsch & Lücking from Sri Lanka has apothecia similar to the preceding species but forms an ecorticate thallus with maculiform to capitate soralia, has small, submuriform ascospores, and lacks secondary substances. Chapsa wolseleyana Weerakon, Lumbsch & Lücking forms apothecia with red to pinkish or purplish red discs and large, muriform ascospores becoming pale brown.

Type
Research Article
Copyright
Copyright © British Lichen Society 2012

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