@ARTICLE{TreeBASE2Ref29328, author = {Liang Zhang and Xue-Ping Fan and Sahanat Petchsri and Lin Zhou and Rossarin Pollawatn and Xin Zhang and Xin-Mao Zhou and Ngan Thi Lu and Ralf Knapp and Sahut Chantanaorrapint and Ponpipat Limpanasittichai and Hang Sun and Xin-Fen Gao and Li-Bing Zhang}, title = {Evolutionary relationships of the ancient fern lineage the adder?s tongues (Ophioglossaceae) with description of Sahashia gen. nov}, year = {2020}, keywords = {Chingioglossum, cryptic speciation, fern phylogeny, Haukia, Holubiella, Shahashia}, doi = {10.1111/cla.12408}, url = {http://}, pmid = {}, journal = {Cladistics}, volume = {36}, number = {0}, pages = {380--393}, abstract = {As an ancient lineage of ferns, Ophioglossaceae are evolutionarily among the most fascinating because they have the highestchromosome count of any known organism as well as the presence of sporophores, subterranean gametophytes, eusporangiatesporangia without annuli, and endophytic fungi. Previous studies have produced conflicting results, identifyingsome lineages withunresolved relationships, and have paid much attention to the subfamily Botrychioideae. But the other species-rich subfamily,Ophioglossoideae, has remained largely understudied and only up to 12 accessions of Ophioglossoideae have been sampled. Inthis study, DNA sequences of seven plastid markers of 149 accessions (75 in Ophioglossoideae) representing approximately 82species (approximately 74% of estimated species diversity sensu J. Syst. Evol., 2016, 54, 563) in the family, and two Marattiaceae and two Psilotaceae, are used to infer a phylogeny. Our major results include: (1) Ophioglossaceae are resolved as monophyletic with strong support, and so are all four subfamilies and genera sensu PPG I except Botrypus and Ophioglossum; (2) anew genus Sahashia is segregated from Botrypus so that the monophyly of Botrypus can be retained; (3) the monophyly ofOphioglossum in its current circumscription is uncertain in spite of our large character sampling; (4) there is substantial crypticspeciation in Ophioderma detected by our molecular and morphological study; (5) the recognition of Holubiella is advocatedbased on its morphology and its sister relationship with Sceptridium; and (6) a novel sister relationship between Botrychium andthe JHS clade (Japanobotrychium + (Holubiella + Sceptridium)) is discovered.} }

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