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| Selaginella wuyishanensis K.W.Xu, X.M.Zhou & Y.F.Duan, in Xu, Chen, Song, ... et Duan, 2022. |
Abstract
A new spikemoss species, Selaginella wuyishanensis, is described and illustrated based on materials collected from Fujian Province, East China. The new species can be distinguished from S. lutchuensis Koidzumi and S. albociliata P. S. Wang by its leaves with extremely long cilia (up to 8 mm) and distinctly white margins, ovate ventral sporophylls, and sporophyll-pteryx completely inverted on dorsal sporophylls. In the present work, a molecular phylogeny, taxonomic description, distribution information, line drawing, and photographs of this new species are presented. A morphological comparison is also given to distinguish it from morphologically similar species in Selaginella sect. Tetragonostachyae (Hook. & Grev.) Hieron. & Sadeb.
Keywords: Danxia landform, Selaginella albociliata, Selaginella subg. Heterostachys, species diversity
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| Illustration of Selaginella wuyishanensis K.W.Xu, X.M.Zhou & Y.F.Duan. A habit B adaxial view of branch C abaxial view of branch with rhizophore D axillary leaf E ventral leaf F dorsal leaf G strobili H ventral sporophyll I dorsal sporophyll (A–F drawn by Sun YB based on the isotype at NF G–I drawn by Wei HJ based on the paratype at CSH). |
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| Selaginella wuyishanensis K.W.Xu, X.M.Zhou & Y.F.Duan A, B habit C abaxial view of portion of branch D portion of branch showing the dorsal leaves E portion of branch showing the ventral and axillary leaves F, G strobili H axillary leave I axillary leave J dorsal leave K ventral sporophyll L dorsal sporophyll M proximal surface of megaspores N detail of megaspore surface O microscopic structures of microspore surface P proximal surface of microspore. |
Selaginella wuyishanensis K.W.Xu, X.M.Zhou & Y.F.Duan, sp. nov.
Diagnosis: The new species is most similar to Selaginella albociliata and S. lutchuensis in the habit, sterile leaves, and spores. However, S. wuyishanensis can be distinguished from the latter two species by its long leaf cilia (up to 0.6 mm), ovate ventral sporophylls, and the smooth perispore surface of the megaspores (Figs 2, 3).
Distribution and habitat: Selaginella wuyishanensis is known only from Fujian Province, East China. Three populations were observed to grow on rocks of the Danxia landform in evergreen broad-leaved forests at elevations of ca. 200–800 m.
Etymology: The species epithet is based on the name of the famous mount Wuyishan, referring to the type locality of the new species.
Ke-Wang Xu, Shui-Fei Chen, Qiang Song, Xiao Zheng, Meng Li, Yan-Ming Fang, Hong-Jin Wei, Hui Ding, Xin-Mao Zhou and Yi-Fan Duan. 2022. Selaginella wuyishanensis (sect. Tetragonostachyae, Selaginellaceae), A New Species from East China and its Phylogenetic Position based on Molecular Data. PhytoKeys. 202: 107-119. DOI: 10.3897/phytokeys.202.85410
