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Usnea dasopoga (Ach.) Nyl. and U. barbata (L.) F. H. Wigg. (Ascomycetes, Parmeliaceae) are two different species: a plea for reliable identifications in molecular studies

Published online by Cambridge University Press:  26 May 2021

Philippe Clerc Open the ORCID record for Philippe Clerc [Opens in a new window]  and
Yamama Naciri Open the ORCID record for Yamama Naciri [Opens in a new window]
Philippe Clerc*
Affiliation:
Conservatoire et Jardin botaniques de la Ville de Genève, Case postale 71, CH-1292Chambésy/GE, Switzerland
Yamama Naciri
Affiliation:
Conservatoire et Jardin botaniques de la Ville de Genève, Case postale 71, CH-1292Chambésy/GE, Switzerland Plant Systematics and Biodiversity Laboratory, Department of Botany and Plant Biology, University of Geneva, Case postale 71, CH-1292Chambésy/GE, Switzerland
*
Author for correspondence: Philippe Clerc. E-mail: philippe.clerc@ville-ge.ch
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Abstract

Using molecular data to delimit species or reconstruct their evolutionary history is now widely used across all organisms. However, such analyses can suffer from poor or false specimen identifications leading to incorrect conclusions. Here we show that the use of misidentified specimens in a phylogenetic framework resulted in questionable conclusions in a previously published study (Mark et al. 2016). Using morphological, chemical and statistical analyses on the specimens used in that study, we found support for Usnea barbata and U. dasopoga being morphologically and anatomically distinct species with separate clusters in the molecular phylogeny. Furthermore, our revision of specimen identifications refutes the synonymization of U. substerilis with U. lapponica. In conclusion, we discuss the issue of correct identification of voucher specimens in DNA databases and conclude with some general suggestions to avoid false specimen identifications in phylogenetic studies.

Keywords

GenBanklichensmisidentificationtaxonomyUsnea lapponicaUsnea perplexansUsnea substerilis
Type
Standard Papers
Information
The Lichenologist , Volume 53 , Issue 3 , May 2021 , pp. 221 - 230
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of the British Lichen Society

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