A classification of the fern genus tectaria (tectariaceae: polypodiales) based on molecular and morphological evidence

Liang Zhang2 and Li-Bing Zhang3* 

1 The research was partially supported by a grant from Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (Y4ZK111B01) to L. Z., a grant from Chengdu Institute of Biology, Chinese Academy of Sciences, grants from the National Geographic Society, and a grant from the National Natural Science Foundation of China to L.-B. Z. (#31628002). We thank three anonymous reviewers and the Editorial Review Committee for helpful comments.

2 Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, People’s Republic of China; and Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences, Yezin, Nay Pyi Taw 05282, Myanmar.

3 Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, U.S.A.; and Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, People’s Republic of China.

* Author for correspondence: Libing.Zhang@mobot.org

PubYear : 2018

Volume: 103(2)

Publication Name: Annals of the Missouri Botanical Garden

Page number: 188-199

Abstract: The pantropical genus Tectaria Cav. (Tectariaceae) is one of the largest fern genera. It has been estimated to contain ca. 210 mostly tropical species in Africa, the Americas, Asia, and the Indian Ocean and Pacific Ocean islands. Tectaria had perhaps been the most confusing fern genus in terms of its circumscription and phylogeny. Recent studies have recircumscribed Tectaria and resolved the relationships within the genus. However, no efforts have been made to propose an infrageneric classification of the genus based on molecular and morphological evidence. In the present study, we synthesize chloroplast and nuclear DNA evidence, morphology, and/or distribution information and divide Tectaria into four subgenera: Tectaria subg. Ctenitopsis (Ching ex Tardieu & C. Chr.) Li Bing Zhang & Liang Zhang (comb. & stat. nov.), Tectaria subg. Phlebiogonium (F´ee) Li Bing Zhang & Liang Zhang (comb. & stat. nov.), Tectaria subg. Tectaria, and Tectaria subg. Tectaridium (Copel.) Li Bing Zhang & Liang Zhang (comb. & stat. nov.). The latter three are further divided into seven, two, and two sections, respectively. Sixteen generic names are synonymized to individual infrageneric taxa, while four generic names are only synonymized to Tectaria because of inadequate data. A key to the infrageneric taxa is given. A nomenclatural account of each infrageneric taxon is provided.

Keywords: Infrageneric classification, Tectaria, Tectariaceae.