Five new genera and revival of a genus based on molecular phylogenetic and morphological evidence in Trichosporeae (Gesneriaceae)

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Abstract
The tribe Trichosporeae is the most species‐rich, systemically complex, and morphologically diverse tribe in the Old World Gesneriaceae. It has long been a focal point and a challenge in the phylogeny of Trichosporeae, with frequent unclear relationships and delimitations among a lot of genera. Here, we conducted a molecular phylogenetic analysis by employing nine DNA fragments with a high sampling coverage for key clades in the tribe Trichosporeae. Meanwhile, we carried out a comprehensive morphological and anatomical investigation on vegetative and floral organs in related genera and species, and try to uncover morphological synapomorphies associated with molecular clades. Our results demonstrated a well‐supported phylogeny of major clades in the tribe, strongly corroborated by morphological data. We find that some genera, such as Raphiocarpus , Briggsia , and Boeica , are not monophyletic. Based on molecular phylogenetic and morphological analyses, we established five new genera and revived a genus in the tribe Trichosporeae, including Neoraphiocarpus , Macrophyllaea , Hispidopalata , Pseudobriggsia , and Kaiyua with revival of Boeicopsis . We further redefined the genera Raphiocarpus and Briggsiopsis . Our results would deepen our understanding about the phylogeny of the Old World Gesneriaceae.
Funding Information
  • National Natural Science Foundation of China (31970239)
  • National Natural Science Foundation of China (32170228)
  • National Natural Science Foundation of China (32460057)

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