A new species of pelomedusoid turtle: Elkanemys pritchardi gen. et sp. nov. from Upper Cretaceous (Cenomanian) is described. The specimen MMCH-PV 73 outcrops at Lago Ezequiel Ramos Mexia, near El Chocón town, Río Negro Province, Argentina. The holotype is only represented by a partial carapace and plastron, which has been included in a cladistic analysis, resulting Elkanemys pritchardi as a member of Cearachelyini tribe of the clade Bothremydidae. This new taxon corresponds to the first record of a Bothremydidae in a Cretaceous horizon of Neuquén Basin. The results here presented highlight the diversity of Pelomedusoides in the Cretaceous of Patagonia allowing the inclusion of this area in further paleobiogeographic history of Bothremydidae clade.

一种新的类比龟：Elkanemys pritchardi gen。等 十一月 描述了来自上白垩统（Cenomanian）的文献。样品MMCH-PV 73在阿根廷里约内格罗省ElChocón镇附近的Lago Ezequiel Ramos Mexia露头。整体型仅由部分甲壳和腹甲代表，该类甲壳和腹甲已被包括在进化分析中，从而使Elkanemys pritchardi成为进化论双孢蛾科的Cearachelyini部落的成员。这个新的分类单元对应于内乌肯盆地白垩纪的双生科的第一个记录。此处给出的结果突出了巴塔哥尼亚白垩纪的Pelomedusoides的多样性，使该区域被包括在Bothremydidae进化枝的进一步的古生物地理史中。