Recognize seven subfamilies of Dryopteridaceae: Dryopteridoideae, Ctenitoideae, Elaphoglossoideae, Lastreopsidoideae, Pleocnemioideae, Polybotryoideae, Polystichopsidoideae

Author(s) of proposal

Zheng-Yu Zuo

Name of taxon

Dryopteridoideae, Ctenitoideae, Elaphoglossoideae, Lastreopsidoideae, Pleocnemioideae, Polybotryoideae, Polystichopsidoideae

Rank of taxon

Subfamily

Approximate number of species affected

ca. 2100

Description of change

The three-subfamily classification of Dryopteridaceae in PPG I was based primarily on weak molecular phylogenetic relationships and lacked morphological evidence. We presented an updated infra-familial classification of Dryopteridaceae with seven subfamilies including four newly proposed subfamilies (Ctenitoideae, Lastreopsidoideae, Pleocnemioideae, and Polystichopsidoideae). The four proposed subfamilies are quite distinct in morphology and phylogenetic evidence.

Reason for change

Fig 8 The three-subfamily classification of Dryopteridaceae is only based on molecular phylogeny. The heterogeneous morphology of the current members of Dryopteridaceae makes the family and its subfamilies difficult even to define by morphological character combinations. Given the unresolved relationships of Ctenitis and Stigmatopteris, PPG I (2016) tentatively placed these two genera in Dryopteridoideae and Polybotryoideae, respectively. We carried out phylogenetic analyses to reconstruct a highly supported phylogeny of Dryopteridaceae. Our analyses recovered 24 strongly supported clades grouped into seven major clades of Dryopteridaceae. Seven morphological characters including habit, rhizome shape, frond morphology, rachis-costae architecture, appendages on stipe base and lamina, and soral arrangement were found to be informative for identifying different major clades and clades in Dryopteridaceae. Based on phylogenetic reconstruction and morphological analysis, we presented an updated infra-familial classification of Dryopteridaceae with seven subfamilies and 24 genera including four newly proposed subfamilies (Ctenitoideae, Lastreopsidoideae, Pleocnemioideae, and Polystichopsidoideae).

Reference(s) for publication of the name

Z.-Y. Zuo, G. Rouhan, S.-Y. Dong et al., A revised classification of Dryopteridaceae based onplastome phylogenomics and morphological evidence, with the description of a new genus, Pseudarachniodes, Plant Diversity, https://doi.org/10.1016/j.pld.2024.07.010

List the numbers of any related issues

No response

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