A new species of semi-terrestrial crab of the genus Geosesarma (Sesarmidae) is described from a limestone cave in central Sarawak, Malaysian Borneo. Geosesarma sodalissp. nov. is characterised by its quadrate carapace, absence of a flagellum on the exopod of the third maxilliped, presence of 10 or 11 sharp tubercles on the dactylus of the chela and a diagnostic male first gonopod structure. This is the sixth species of Geosesarma reported from Sarawak, and the first member of the genus collected from inside caves.

中文翻译：

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Geosesarma sodalis，来自马来西亚砂拉越中部石灰岩洞穴的一种新的吸血蟹蟹（甲壳纲，Brachyura，Sesarmidae）

在马来西亚婆罗洲沙捞越中部的一个石灰岩洞穴中，描述了一种新的Geosesarma（Sesarmidae）属半陆生蟹。Geosesarma sodalissp。十一月 其特征是其四方形的甲壳，在第三上颌的外足上没有鞭毛，在螯的趾甲上有10或11个锋利的结节和诊断性的雄性第一类足类结构。这是砂拉越报道的第六种Geosesarma，也是从洞穴内部收集的第一属。