Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-24T01:34:07.753Z Has data issue: false hasContentIssue false

Molecular phylogeny and status of Diploicia and Diplotomma, with observations on Diploicia subcanescens and Diplotomma rivas-martinezii

Published online by Cambridge University Press:  28 March 2007

María del Carmen Molina
Affiliation:
M. del C. Molina (corresponding author): Departamento de Ciencias Experimentales e Ingenieria, Escuela Superior de Ciencias Experimentales y Tecnologia, Universidad Rey Juan Carlos, Madrid 28933, Spain.
Ana Crespo
Affiliation:
A. Crespo, O. Blanco & D. L. Hawksworth: Departamento de Biología Vegetal II, Facultad de Farmacia, Universidad Complutense, Madrid 28040, Spain.
Oscar Blanco
Affiliation:
A. Crespo, O. Blanco & D. L. Hawksworth: Departamento de Biología Vegetal II, Facultad de Farmacia, Universidad Complutense, Madrid 28040, Spain.
Néstor Hladun
Affiliation:
N. Hladun: Departament de Biologia Vegetal (Botanica), Universitat de Barcelona, Av. Diagonal 645, Barcelona 08028, Spain.
David L. Hawksworth
Affiliation:
A. Crespo, O. Blanco & D. L. Hawksworth: Departamento de Biología Vegetal II, Facultad de Farmacia, Universidad Complutense, Madrid 28040, Spain.

Abstract

ITS rDNA sequence data shows that Diploicia and Diplotomma species form a monophyletic clade distinct from other Buellia species. This indicates that Diplotomma merits acceptance as a genus, and suggests that Diploicia should be treated as a synonym of Diplotomma, the earlier name. The data also shows Diploicia subcanescens, considered the fertile counterpart in a species pair with D. canescens, is nested within D. canescens and should be treated as a synonym despite reported chemical differences. In addition, the molecular data support the distinctness of Diplotomma rivas-martinezii, a species restricted to gypsum rocks in Spain, from the widespread D. venustum, which grows on calcareous rocks. Aposymbiotic cultures suggest that D. rivas-martinezii also differs from D. venustum in its germination and isolation success rates. One new combination is made: Diplotomnta pulverulenta (Anzi) D. Hawksw. (syn. Abrothallus pulverulentus Anzi) for the lichenicolous species previously known as Buellia pulverulenta.

Type
Research Article
Copyright
Copyright © British Lichen Society 2002

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)