Abstract Araripesuchus (Uruguaysuchidae) is a Gondwanan mesoeucrocodylian genus that includes several species, distributed in the Cretaceous of Niger (A. wegeneri and A. rattoides), Madagascar (A. tsangatsangana), Brazil (A. gomesii), and Argentina (A. patagonicus and A. buitreraensis). The two Argentinean species came from different localities of the lower Cenomanian of Patagonia. Here, we present a complete cranial description of A. buitreraensis and explore its phylogenetic relationships, based on new as well as previously reported specimens. We studied the skulls of eight specimens of A. buitreraensis, almost all represented by partial cranium and mandible, adding new autapomorphies to the original diagnosis of this taxon. A comparison between the new specimens also reveals some discrepant features, which are interpreted as ontogeny or as intraspecific variation. We present revised scorings of several uruguaysuchid species (A. buitreraensis, A. gomesii, and Uruguaysuchus aznarezi) from a published morphological dataset and conduct a phylogenetic analysis to test the phylogenetic position of A. buitreraensis. As in resent phylogenetic proposals, this taxon was recovered as the basalmost member of a clade, which clusters all uruguaysuchids from South America. A revision of the diagnosis and a new phylogenetic definition of Uruguaysuchidae is also presented.

中文翻译：

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Araripesuchus buitreraensis 的新解剖学信息对乌拉圭鳄科（Crocodyliforms，Notosuchia）的系统学有影响

摘要 Araripesuchus (Uruguaysuchidae) 是一种冈瓦纳中鳄鱼属，包括多个物种，分布于尼日尔白垩纪 (A. wegeneri and A. rattoides)、马达加斯加 (A. tsangatsangana)、巴西 (A. gomesii) 和阿根廷 (A. patagonicus 和 A. buitreraensis）。这两个阿根廷物种来自巴塔哥尼亚下塞诺曼尼亚的不同地区。在这里，我们基于新的以及以前报道的标本，对 A. buitreraensis 进行了完整的颅骨描述，并探索了其系统发育关系。我们研究了 8 个 A. buitreraensis 标本的头骨，几乎都以部分颅骨和下颌骨为代表，为该分类群的原始诊断增加了新的自体形态。新标本之间的比较也揭示了一些差异特征，这被解释为个体发育或种内变异。我们从已发布的形态学数据集中展示了几种 uruguaysuchid 物种（A. buitreraensis、A. gomesii 和 Uruguaysuchus aznarezi）的修订评分，并进行了系统发育分析以测试 A. buitreraensis 的系统发育位置。正如在最近的系统发育提议中一样，这个分类群被恢复为一个进化枝的最基础成员，该进化枝聚集了来自南美洲的所有乌拉圭鳄科。还介绍了 Uruguaysuchidae 诊断的修订和新的系统发育定义。正如在最近的系统发育提议中一样，这个分类群被恢复为一个进化枝的最基础成员，该进化枝聚集了来自南美洲的所有乌拉圭鳄科。还介绍了 Uruguaysuchidae 诊断的修订和新的系统发育定义。正如在最近的系统发育提议中一样，这个分类群被恢复为一个进化枝的最基础成员，该进化枝聚集了来自南美洲的所有乌拉圭鳄科。还介绍了 Uruguaysuchidae 诊断的修订和新的系统发育定义。