New insights into the phylogeny and relationships within the worldwide genus Riccardia (Aneuraceae, Marchantiophytina)

  • Lucile Rabeau Université Pierre et Marie Curie – Sorbonne Universités – Institut de Systématique, Évolution, Biodiversité, ISYEB, UMR 7205, CNRS-MNHN-UPMC-EPHE, Muséum national d’Histoire naturelle, 57 rue Cuvier, CP 39, 75005 Paris
  • S. Robbert Gradstein Université Pierre et Marie Curie – Sorbonne Universités – Institut de Systématique, Évolution, Biodiversité, ISYEB, UMR 7205, CNRS-MNHN-UPMC-EPHE, Muséum national d’Histoire naturelle, 57 rue Cuvier, CP 39, 75005 Paris
  • Jean-Yves Dubuisson Université Pierre et Marie Curie – Sorbonne Universités – Institut de Systématique, Évolution, Biodiversité, ISYEB, UMR 7205, CNRS-MNHN-UPMC-EPHE, Muséum national d’Histoire naturelle, 57 rue Cuvier, CP 39, 75005 Paris
  • Martin Nebel Staatliches Museum für Naturkunde Stuttgart, Rosenstein 1, 70191 Stuttgart
  • Dietmar Quandt Nees-Institut für Biodiversität der Pflanzen, Rheinische Friedrich-Wilhelms-Universität Bonn, Meckenheimer Allee 170, 53115 Bonn
  • Catherine Reeb Université Pierre et Marie Curie – Sorbonne Universités – Institut de Systématique, Évolution, Biodiversité, ISYEB, UMR 7205, CNRS-MNHN-UPMC-EPHE, Muséum national d’Histoire naturelle, 57 rue Cuvier, CP 39, 75005 Paris
DOI: https://doi.org/10.5852/ejt.2017.273
Keywords: Afroriccardia gen. nov., Aneuraceae, liverworts, phylogeny, Riccardia

Abstract

With 280 accepted species, the genus Riccardia S.F.Gray (Aneuraceae) is one of the most speciose genera of simple thalloid liverworts. The current classification of this genus is based on morphological and limited-sampling molecular studies. Very few molecular data are available and a comprehensive view of evolutionary relationships within the genus is still lacking. A phylogeny focusing on relationships within the large genus Riccardia has not been conducted. Here we propose the first worldwide molecular phylogeny of the genus Riccardia, based on Bayesian inference and parsimony ratchet analyses of sequences from three plastid regions (psbA-trnH, rps4, trnL-F). The results support the monophyly of Riccardia and a new monospecific genus, Afroriccardia Reeb & Gradst. gen. nov., is described based on molecular and morphological evidence. The results indicate that several currently recognized infrageneric divisions and a few species are not monophyletic, suggesting that further analyses are needed to arrive at a proper understanding of the phylogeny of the genus. Although evidence for an Andean clade was found, most of the species appear scattered in different clades without clear geographical segregation. Broader sampling and further analyses are necessary in order to improve our understanding of the phylogeny of this poorly known liverwort genus.

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Published
2017-02-08
How to Cite
Rabeau, L., Gradstein, S. R., Dubuisson, J.-Y., Nebel, M., Quandt, D., & Reeb, C. (2017). New insights into the phylogeny and relationships within the worldwide genus Riccardia (Aneuraceae, Marchantiophytina). European Journal of Taxonomy, (273). https://doi.org/10.5852/ejt.2017.273
Issue
No. 273 (2017): New insights into the phylogeny and relationships within the worldwide genus Riccardia (Aneuraceae, Marchantiophytina)
Section
Botany
Copyright (c) 2017 Lucile Rabeau, S. Robbert Gradstein, Jean-Yves Dubuisson, Martin Nebel, Dietmar Quandt, Catherine Reeb

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