Abstract The new Pleurodira turtle Itapecuruemys amazonensis gen. et sp. nov. from the Itapecuru Formation (Parnaiba Basin, Brazil) is described. The new species is represented only by its holotype, which consists of an almost complete carapace and plastron, with an oval-shaped outline. The most peculiar characters of Itapecuruemys amazonensis are: neural plates six and seven are separated by costal six, and the seventh neural plate contacts the sixth, seventh and eighth costal plates and a suprapygal. The phylogenetic hypothesis proposed in this paper suggests that Itapecuruemys amazonensis, together with Cearachelys and Galianemys spp., form a monophyletic assemblage and also widen the paleoherpetological diversity of the Itapecuru Formation in the Parnaiba Basin (Brazil).

中文翻译：

---

巴西 Parnaíba 盆地下白垩统的一个新白垩纪 (Pleurodira:Pelomedusoides)

摘要 新的侧耳龟 Itapecuruemys amazonensis gen。等 sp. 十一月 来自 Itapecuru 组（巴西帕奈巴盆地）的描述。新物种仅以其正模标本为代表，它由几乎完整的甲壳和腹甲组成，具有椭圆形轮廓。Itapecuruemys amazonensis最奇特的特征是：六、七神经板被六肋隔开，第七神经板与六、七、八肋板及一上肋板接触。本文提出的系统发育假说表明，Itapecuruemys amazonensis 与 Cearachelys 和 Galianemys spp. 一起形成单系组合，也拓宽了 Parnaiba 盆地（巴西）Itapecuru 组的古爬行动物多样性。