Phylogeny and taxonomy of Afrocayratia, a new genus of Vitaceae from continental Africa and Madagascar

• DOI: 10.1111/jse.12697
• Publication Date: 2020-10-14T18:21:21Z
• Authors: Romer Narindra Ra...; Viet‐Cuong Dang; Gaurav Parmar; Bing Liu; Jun Wen; Zhi‐Duan Chen; Li‐Min Lu
• Keywords: Vitaceae; Monophyly; Lineage (genetic); Molecular Phylogenetics

Abstract The genus Cayratia Juss. in the traditional sense (i.e., s.l.) of grape family has been shown to be non‐monophyletic. Previous studies supported splitting s.l. into three genera, that is, s.s., Causonis Raf., and a new representing African clade. However, morphology clade not studied carefully its phylogenetic position within Vitaceae remains unclear. Our study integrates molecular, distributional, morphological data supports recognition Afrocayratia from continental Africa Madagascar. Phylogenetic analyses strongly support monophyly resolve it as sister s.s. based on chloroplast data, but is placed Cyphostemma internal transcribed spacer dataset. Molecular dating suggests split with during Paleocene, extant species did diversify until early Miocene. differs allied genera having short stigmas seeds subcircular ventral infold cavities cross‐section. Three clades are detected , A. debilis (Baker) J.Wen & L.M.Lu first diverged lineage. second lineage includes delicatula (Willems) Z.D.Chen gracilis (Guill. Perr.) Z.D.Chen. third imerinensis L.M.Lu, longiflora (Desc.) Rabarijaona, triternata Rabarijaona Madagascar, which form monophyletic group middle Combining molecular evidence, we formally describe make seven combinations, provide key genus.