The middle Miocene site of Gračanica in Bosnia and Herzegovina, where limnic sediments of the former Lake Bugojno are exposed, yielded remains of a crab. The single specimen represents a freshwater brachyuran classified in the open nomenclature as Potamon sp. With an age of ~ 15 Ma, the Gračanica specimen is the oldest Potamon occurrence from southern Europe. An articulated female individual with preserved pereiopods suggests autochthonous or parautochthonous nature of the specimen. Presence of cuticular disks in the studied specimen confirms that these structures, previously identified in decayed crab specimens in actualistic taphonomic experiments, can be preserved in the fossil record. If found isolated, the disks may confirm the presence of decapods in studied assemblages and can be considered an additional tool for identification of otherwise rare freshwater crab fossils.

中文翻译：

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来自中新世中部布戈尼诺湖（波哥大，波斯尼亚和黑塞哥维那）的淡水螃蟹波塔蒙（Brachyura：Potamidae），上面有关于波塔米德语的注释

波斯尼亚和黑塞哥维那Gračanica的中新世中期遗址暴露了前Bugojno湖的石灰岩沉积物，产生了螃蟹的遗骸。单个标本代表以开放式命名法分类为Potamon sp的淡水短毛蛙。Gračanica标本的年龄约为15 Ma，是最古老的Potamon发生于南欧。一个有节肢动物的关节的女性个体暗示了标本的自然或近自然特征。研究样品中的表皮盘的存在证实了这些结构，以前在实际的垂涎实验中在腐烂的螃蟹样品中鉴定出的这些结构可以保存在化石记录中。如果发现是孤立的，这些盘可能会证实十足动物存在于所研究的组合中，并且可以被认为是识别其他稀有淡水蟹化石的额外工具。