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| Selaginella orientali-chinensis Ching et C. F. Zhang ex H. W. Wang et W. B. Liao, co-occurred population of S. orientali-chinensis [A-B] and S. tamariscina [C] (S. tamariscina is showed in the red dotted boxes). in Wang, Dai, Chen, Fan & Liao, 2022. |
Abstract
Selaginella tamariscina (Beauv.) Spring and S. pulvinata (Hook. et Grev.) Maxim. are two closely related rosette forming and resurrection spikemoss species widespread in Asia. In this paper， Selaginella orientali-chinensis Ching et C. F. Zhang ex H. W. Wang et W. B. Liao was described and illustrated. This species was closely related to S. tamariscina and S. pulvinata and previously misidentified as S. tamariscina. By the gross morphological and molecular evidences， we found that this species is easily distinguished from S. tamariscina and S. pulvinata by the absolutely dichotomously branched main stems. Our field works confirmed that this species is widely distributed in southeastern China and mainly inhabits Danxia landforms areas. In some cases， this species shares the same habitats with S. tamariscina. Illustrating the morphological， phylogenetic and distribution characters of this new species would provide new data for the taxonomic studies on the genus Selaginella in the future.
Key words: Selaginella, Danxia landforms, morphology, phylogeny, distribution
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| Selaginella orientali-chinensis Ching et C. F. Zhang ex H. W. Wang et W. B. Liao. A: Lower view of branchlets; B; Upper view of branchlets; C: Dorsal leaf; D: Ventral leaf ; E: Megasporophyll; F: Microsporophyll; G: Lower view of strobilus; H: Upper view of strobilus. |
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| Selaginella orientali-chinensis Ching et C. F. Zhang ex H. W. Wang et W. B. Liao. A: Habit; B: Dorsal leaf; C: Ventral leaf; D: Strobilus; E: Part of main stem showing ventral leaves, axillary leaves; F: Part of main stem showing dorsal leaves; G: Megasporophyll; H: Microsporophyll. (Drawn by Yun-Xiao Liu) |
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| Morphology comparison between Selaginella orientali-chinensis and S. tamariscina A-B: S. orientali-chinensis; C: S. tamariscina; D: A co-occurred population of S. orientali-chinensis and S. tamariscina (S. tamariscina is showed in the red dotted boxes). |
Selaginella orientali-chinensis Ching et C. F. Zhang ex H. W. Wang et W. B. Liao, sp. nov.
Diagnosis. The new species is similar to S. tamariscina and S. pulvinata in plant form and the morphology of dorsal leaves, ventral leaves, and sporophylls. However, the main stems of S. orientali-chinensis are absolutely dichotomously branched, while those of S. tarmariscina and S. pulvinata are pinnately branched. Additionally, S. pulvinata usually inhabits alpine, plateau, and temperate region, and the tree-like trunks usually form compact cushions, but S. orientali-chinensis and S. tamariscina are distributed in the mountains or lowland of subtropical regions, and have tree-like trunks that are slender and do not form compact cushions.
Haowei WANG, Jingmin DAI, Zaixiong CHEN, Qiang FAN and Wenbo LIAO. 2022. Selaginella orientali-chinensis, A New Resurrection Spikemoss Species from southeastern China based on Morphological and Molecular Evidences. ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS SUNYATSENI (中山大学学报（自然科学版). 61(2);
中国东南部复苏卷柏一新种：东方卷柏 ——基于形态学和分子生物学证据
摘要：卷柏和垫状卷柏是两种近缘的莲座状复苏卷柏，两者在亚洲皆有广阔的分布区域。本研究描述并修订了东方卷柏这一新种；该种是卷柏和垫状卷柏的近缘种，此前常被错误鉴定为卷柏。东方卷柏与卷柏和垫状卷柏最大的形态差异在于东方卷柏的主茎为二叉分枝，而卷柏和垫状卷柏的主茎为羽状分支。形态学和分子系统发育数据分析强烈支持卷柏、垫状卷柏和东方卷柏各自独立的物种地位。通过查阅以往被错误鉴定的东方卷柏标本，可知该种广泛地分布于华东和华南地区。此外，野外调查表明该新种主要生长于丹霞地貌区，有时会和卷柏混生。本文对东方卷柏新种的形态、系统发育和地理分布进行了描述，这将有助于未来的植物学和生态学野外工作者开展针对性的相关研究。东方卷柏学名的种加词 orientali-chinensis 是我国蕨类分类学家秦仁昌及张朝芳1982年在标本台纸上对该种作出的鉴定，使用的是裸名，没有描述，本文在此正式合格发表继续采用了该名称，以资纪念。
关键词: 卷柏属, 丹霞地貌, 形态学, 系统发育, 地理分布
