Molecular Species Delimitation of the Genus Reishia (Mollusca: Gastropoda) along the Coasts of China and Korea

Molecular Species Delimitation of the Genus Reishia (Mollusca: Gastropoda) along the Coasts of China and Korea
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中国和韩国沿海灵芝属(软体动物:腹足类)分子物种界定

DOI:
10.2108/zs190153
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发表时间:
2020-06
期刊:
影响因子:
0.9
通讯作者:
Li Qi
Li Qi
中科院分区:
生物学4区
文献类型:
--
作者:
Zhao Dan;Kong Ling-feng;Sasaki Takenori;Li Qi

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记述了东亚潮间带岩岸的食蟹腹足类Reishia黑田and Habe,1971种。由于它们的外壳形态变化很大,该属在种水平上的分类仍需要重新评估。利用基于DNA的定界方法,对中国沿海及邻近亚洲地区沿着灵芝属植物的种类数量进行了调查。此外,我们使用基于形态学的统计方法寻找诊断特征。我们的遗传数据表明,所研究的个体包括两个独立的物种的一个Reishia复杂的在这一地区,与以前提出的四个或更多的类群。贝壳形态特征的统计分析进一步支持了这一结论。形态种R. bronni(Dunker,1860),R. jubilaea(Tan and Sigurdsson,1990),和R. luteostoma(Holten,1803)被归为一个分类单元,表明它们可能是同一种的异名。形态种R. clavigera(Küster,1860)单独形成一个组,这表明它可能是一个有效的名称。估计的分歧时间的两个确定的类群表明,物种形成可能已与海平面和温度波动在上新世更新世期间。本研究为进一步研究该属植物的生态学、进化生物学和保护提供了重要信息。
Species of the predatory gastropod genus Reishia Kuroda and Habe, 1971 (Muricidae) inhabit intertidal rocky shores in East Asia. Due to their highly variable external shell morphology, the taxonomy of this genus at species-level is still in need of re-evaluation. Using DNA-based delimitation methods, we aimed to ascertain the number of species of Reishia along the coasts of China and adjacent Asian areas. Also, we looked for diagnostic traits using morphology-based statistical approaches. Our genetic data suggest that the studied individuals comprised two separate species of a Reishia complex in this region, in contrast to the previously proposed four or more taxa. This conclusion is further supported by statistical analyses of shell morphological characteristics. The morphospecies R. bronni (Dunker, 1860), R. jubilaea (Tan and Sigurdsson, 1990), and R. luteostoma (Holten, 1803) were assigned to a single taxon, indicating that they might be synonyms of the same species. The morphospecies R. clavigera (Küster, 1860) singly formed one group, suggesting that it is likely a valid name. The estimated divergence time of the two identified taxa indicates that speciation might have been associated with the sea level and temperature fluctuations during the Plio-Pleistocene period. Our study on Reishia species provides crucial information for further research on the ecology, evolutionary biology, and conservation of this genus.
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