Parasesarma is a species-rich genus whose representatives are common in wetlands and mangroves of the Indo-Pacific. Morphologically, the genus is heterogeneous and has been postulated to constitute a polyphyletic taxon. In the present study, most species of Parasesarma are re-evaluated phylogenetically, using mitochondrial and nuclear molecular markers. The results show that the majority of the examined species cluster consistently with the type species Parasesarma plicatum. However, some species, among them the tree-climbing Parasesarma leptosoma, are clearly separated from this main clade of Parasesarma, forming a second stable monophyletic group, distinct from other known genera. Based on these results, and with additional support by morphological diagnoses highlighting consistent differences between the two species groups, we propose a new genus for the species clustering around P. leptosoma, proposing the new name Leptarma gen. nov.

中文翻译：

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基于遗传和形态学比较，对新寄生虫属进行分类的寄生虫（甲壳纲：Brachyura：十足目：Sesarmidae）的分类学重新评估。

Parasesarma是一个物种丰富的属，其代表常见于印度太平洋的湿地和红树林。在形态上，该属是异质的，并已假定构成多系分类群。在本研究中，使用线粒体和核分子标记物重新评估了大多数副杀虫物种的系统发育。结果表明，大部分被检物种与副Para属类型一致。但是，某些物种，其中包括攀树的Parasesarma瘦肉瘤，显然与Parasesarma的主要进化枝分开，形成另一个稳定的单系群，与其他已知属不同。基于这些结果，并与形态学诊断突出两个物种群体之间的一致的差异额外的支持，我们提出了种聚类周围一个新属P. leptosoma，提出了新的名称Leptarma根。十一月