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Disentangling Antirhea (Rubiaceae) : Resurrection of Guettardella and description of the new genus Achilleanthus

Title data

Chavez, Jayson G. ; Meve, Ulrich ; Nürk, Nicolai ; Liede-Schumann, Sigrid:
Disentangling Antirhea (Rubiaceae) : Resurrection of Guettardella and description of the new genus Achilleanthus.
In: Botanical Journal of the Linnean Society. Vol. 197 (March 2021) . - pp. 85-103.
ISSN 1095-8339
DOI: https://doi.org/10.1093/botlinnean/boab013

Abstract in another language

The Palaeotropical genus Antirhea (Guettardeae, Rubiaceae) currently comprises 37 dioecious species classified into three subgenera, Antirhea, Mesocarpa and Guettardella. It has a complex taxonomic history with varying generic delineation and variable application of species names. Recent phylogenetic studies have indicated the non-monophyly of Antirhea, but the limited sampling does not allow resolution of its circumscription or nomenclatural changes to be proposed. Here, we reconcile the generic boundaries of Antirhea based on phylogenetic analyses of two nuclear (ETS, ITS) and three plastid loci (atpB-rbcL, rps16, trnT-F) using Bayesian, maximum likelihood and parsimony methods. Our results show that Antirhea in its current circumscription is highly polyphyletic, whereas its three subgenera are retrieved as well-supported independent clades. A new generic framework is proposed based on phylogenetic results and supported by morphological evidence. We intend to restrict Antirhea to species native to the Mascarene Islands and Madagascar, to reinstate the genus Guettardella with emended diagnostic features and to describe the new genus Achilleanthus to accommodate the species of subgenus Mesocarpa plus Guettarda glabrescens, G. hypoplasia and G. ngoyensis. As a consequence, seven new combinations in Achilleanthus and 17 new combinations in Guettardella are made.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Dioecy; Guettardeae; Indo-Pacific region; Palaeotropics; Phylogenetic analysis; Taxonomy; Typification
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics > Chair Plant Systematics - Univ.-Prof. Dr. Sigrid Liede-Schumann
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 580 Plants (Botany)
Date Deposited: 07 Jul 2021 06:48
Last Modified: 07 Sep 2021 12:18
URI: https://eref.uni-bayreuth.de/id/eprint/66481