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Issue: Vol. 732 No. 1: 3 Dec. 2025
Type: Article
Published: 2025-12-03
DOI: 10.11646/phytotaxa.732.1.3
Page range: 35-45
Abstract views: 67
PDF downloaded: 4

Angiopteris involuta (Marattiaceae), a new endangered fern species from southern Yunnan, China, based on morphology and molecular evidence

Centre for Gardening and Horticulture, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, Yunnan, China
School of Ecology and Environmental Science, Yunnan University, Kunming 650504, Yunnan, China
Centre for Gardening and Horticulture, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, Yunnan, China
School of Ecology and Environmental Science, Yunnan University, Kunming 650504, Yunnan, China
School of Life Sciences, Yunnan University, East Outer Ring Road, Chenggong District, Kunming 650500, Yunnan, China
School of Life Sciences, Yunnan University, East Outer Ring Road, Chenggong District, Kunming 650500, Yunnan, China
Marattiaceae eusporangiate plastome hybridization morphology Pteridophytes

Abstract

A new fern species, Angiopteris involuta L.J. Jiang & Z.R. He, is described from southern Yunnan, China. This taxon exhibits intermediate morphology between Angiopteris s.s. and Archangiopteris, characterized by its ascending rhizome, once pinnate to bipinnate, involute fertile pinnules, and long-linear, medial sori. Molecular phylogenetic analysis based on plastome data indicates that A. involuta is closely related to species of Archangiopteris s.s. (A. bipinnata, A. chingii, A. latipinna, and A. nodosipetiolata), but distinct from other intermediate species belonging to Angiopteris s.s. (A. itoi, A. sparsisora, and A. sugongii). The species is assessed as Critically Endangered (CR) under IUCN criteria due to habitat loss and its extremely limited distribution.

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How to Cite

Jiang, L.-J., Zhao, J., Niu, H.-B., Zhou, X.-M., Wang, J.-G. & He, Z.-R. (2025) Angiopteris involuta (Marattiaceae), a new endangered fern species from southern Yunnan, China, based on morphology and molecular evidence. Phytotaxa 732 (1): 35–45. https://doi.org/10.11646/phytotaxa.732.1.3