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Phylogeny,character evolution,and classification of Selaginellaceae(lycophytes)

Plant Diversity 2023年第6期45卷 630-684页

作者： Xin-Mao Zhou Li-Bing Zhang School of Ecology and Environmental Science Yunnan UniversityKunming 650504YunnanChina Missouri Botanical Garden 4344 Shaw BlvdSt.LouisMissouri 63110USA Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041SichuanChina

Selaginella is the largest and most taxonomically complex genus in *** fact that over 750 species are currently treated in a single genus makes Selaginellales/Selaginellaceae unique in *** we assembled a dataset of six existing and newly sampled plastid and nuclear loci with a total of 684 accessions(74%increase of the earlier largest sampling)representing ca.300 species to infer a new *** evolution of 10 morphological characters is studied in the new phylogenetic *** major results include:(1)the nuclear and plastid phylogenies are congruent with each other and combined analysis well resolved and strongly supported the relationships of all but two major clades;(2)the Sinensis group is resolved as sister to *** with strong support in two of the three analyses;(3)most morphological characters are highly homoplasious but some characters alone or combinations of characters well define the major clades in the family;and(4)an infrafamilial classification of Selaginellaceae is proposed and the currently defined Selaginella *** split into seven subfamilies(corresponding to the current six subgenera t the Sinensis group)and 19 genera(the major diagnosable clades)with nine new species-poor *** support the conservation of Selaginella with a new type,***,to minimize nomenclatural *** provide a key to subfamilies and genera,images illustrating their morphology,their morphological and geographical synopses,a list of constituent species,and necessary new *** new classification will hopefully facilitate communication,promote further studies,and help conservation.

关键词： Generic classification Homoplasy Lycophyte phylogeny megaspore types Microspores Nuclear 18S and 26S genes

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