Morphological and molecular evidence for a new endemic freshwater crab, Sesarma ayatum sp. n., (Grapsidae, Sesarminae) from eastern Jamaica
Morphological and molecular evidence for a new endemic freshwater crab, Sesarma ayatum sp. n., (Grapsidae, Sesarminae) from eastern Jamaica
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新特有淡水蟹 Sesarma ayatum sp 的形态学和分子证据。
DOI：
10.1111/j.1463-6409.1998.tb00468.x
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发表时间：
1998
影响因子：
2.5
通讯作者：
R. Diesel
中科院分区：
文献类型：
--
作者：
C. Schubart;J. Reimer;R. Diesel
最近的形态学研究表明，牙买加山溪蟹，Sesarma bidentatum Benedict，1892（Sensu Abele 1992），由几个异地形式。在牙买加西部已经描述了三个新种（在Reimer等人1998年总结），限制了S。bidentatum到牙买加中部和东部。在这项研究中，我们使用形态和遗传标记，以进一步区分蟹种群从不同的东牙买加河流系统。雄性生殖足的形状、前足、螯腕和步行腿等形态特征以及线粒体DNA序列（16s rRNA基因）的比较，在种群分离中具有一致性。bidentatum分为两个不同的群体。本文报道了一新种，长序相手蟹Sesarma ayatum sp. n.，分布于牙买加东部至蓝山东部。
Recent morphological studies have shown that the Jamaican mountain stream crab, Sesarma bidentatum Benedict, 1892 (Sensu Abele 1992), consists of several allopatric forms. Three new species have been described from western Jamaica (summarized in Reimer et al. 1998) restricting the range of S. bidentatum to central and eastern Jamaica. In this study we used morphology and genetic markers to further distinguish crab populations from different East Jamaican river systems. Morphological characters such as the shape of male gonopods, front, chelar carpus, and walking legs, as well as mtDNA sequence (16s rRNA gene) comparisons were consistent in the separation of populations of S. bidentatum into two distinct groups. A new species, Sesarma ayatum sp. n., is described with a distribution from easternmost Jamaica to the eastern Blue Mountains.