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Issue: Vol. 778 No. 3: 9 Oct. 2026
Type: Article
Published: 2026-10-09
DOI: 10.11646/phytotaxa.778.3.4
Page range: 259-269
Abstract views: 13
PDF downloaded: 1

Castanopsis pachycupula (Fagaceae), a new species from Vietnam

College of Forestry; Fujian Agriculture and Forestry University; Fuzhou; China
Silviculture Research Institute; Vietnamese Academy of Forest Sciences; 46 Duc Thang; Dong Ngac ward; Ha Noi; Vietnam
College of Forestry; Fujian Agriculture and Forestry University; Fuzhou; China
College of Forestry; Fujian Agriculture and Forestry University; Fuzhou; China
Faculty of Natural Resources and Environment; Vietnam National University of Forestry - Dong Nai Campus; Dong Nai; Vietnam
Bidoup Nui Ba National Park; Lam Dong; Vietnam
College of Forestry; Fujian Agriculture and Forestry University; Fuzhou; China; Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at Fujian Agriculture and Forestry University; Fuzhou; China
Eudicots phylogeny new species plastid genome Castanopsis

Abstract

A new species, Castanopsis pachycupula (Fagaceae), is described and illustrated from Bidoup Nui Ba National Park, Vietnam. Morphologically, C. pachycupula closely resembles C. dongchoensis, but it can be distinguished by its leaf and nut morphology, as well as by the cupule features. Phylogenetic analyses based on complete chloroplast genome sequences of genus Castanopsis strongly support a close relationship between the new species and C. dongchoensis. Both taxa morphological characteristics and molecular evidence provide a robust support suggesting a distinct species of C. pachycupula. In addition, the complete plastid genome of this new species is reported.

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How to Cite

Xin, Y.-X., Hoang, T.S., Lin, Y.-Z., Fu, H.-H., Hop, N.V., Truong, C.Q. & Chen, S.-P. (2026) Castanopsis pachycupula (Fagaceae), a new species from Vietnam. Phytotaxa 778 (3): 259–269. https://doi.org/10.11646/phytotaxa.778.3.4