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Type: Article
Published: 2016-06-01
Page range: 98–112
Abstract views: 20
PDF downloaded: 2

Paracarphalea, a new genus of the coffee family segregated from the Malagasy endemic genus Carphalea (Rubiaceae, Rubioideae, Knoxieae)

Department of Botany, Stockholm University, SE-106 91 Stockholm, Sweden Department of Organismal Biology, Systematic Biology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36 Uppsala, Sweden
The Linnaean Gardens of Uppsala, Uppsala University, Villavägen 8, SE-752 36 Uppsala, Sweden
Department of Botany, Stockholm University, SE-106 91 Stockholm, Sweden Bergius Foundation, Royal Swedish Academy of Sciences, SE-104 05 Stockholm, Sweden
Bergius Foundation, Royal Swedish Academy of Sciences, SE-104 05 Stockholm, Sweden Swedish Museum of Natural History, Department of Botany, Box 50007, SE-104 05 Stockholm, Sweden
rps16 trnT-F ITS ETS molecular phylogenetics IUCN criteria Eudicots

Abstract

The Malagasy genus Carphalea (Rubiaceae) consists of six species (C. angulata, C. cloiselii, C. kirondron, C. linearifolia, C. madagascariensis, C. pervilleana) of shrubs or small trees and is recognizable by a distinctly lobed calyx, 2(–4)-locular ovaries, each locule with several ovules on a rod-like stalk arising from the base of the locule, and indehiscent fruits. Carphalea linearifolia, rediscovered in 2010, has not previously been included in any Rubiaceae molecular phylogenetic studies. We re-investigated the monophyly of Carphalea using sequence data from chloroplast (rps16 and trnT-F) and nuclear (ITS and ETS) markers analysed with parsimony and Bayesian methods. Carphalea linearifolia forms a clade with C. cloiselii and the type species C. madagascariensis. This clade is sister to a clade consisting of the rest of the Carphalea species plus the genus Triainolepis. According to these results, the new genus Paracarphalea is here described to accommodate Carphalea angulata, C. kirondron, and C. pervilleana. The conservation status of Carphalea linearifolia is assessed as critically endangered according to IUCN criteria.