Narváez Iván, Brochu Christopher A, Escaso Fernando, Pérez-García Adán, Ortega Francisco
Grupo de Biología Evolutiva, Universidad Nacional de Educación a Distancia, Madrid, Madrid, Spain.
Department of Earth and Environmental Sciences, University of Iowa, Iowa City, Iowa, United States of America.
PLoS One. 2015 Nov 4;10(11):e0140679. doi: 10.1371/journal.pone.0140679. eCollection 2015.
The late Campanian-early Maastrichtian site of Lo Hueco (Cuenca, Spain) has provided a set of well-preserved crocodyliform skull and lower jaw remains, which are described here and assigned to a new basal eusuchian taxon, Lohuecosuchus megadontos gen. et sp. nov. The reevaluation of a complete skull from the synchronous site of Fox-Amphoux (Department of Var, France) allows us to define a second species of this new genus. Phylogenetic analysis places Lohuecosuchus in a clade exclusively composed by European Late Cretaceous taxa. This new clade, defined here as Allodaposuchidae, is recognized as the sister group of Hylaeochampsidae, also comprised of European Cretaceous forms. Allodaposuchidae and Hylaeochampsidae are grouped in a clade identified as the sister group of Crocodylia, the only crocodyliform lineage that reaches our days. Allodaposuchidae shows a vicariant distribution pattern in the European Late Cretaceous archipelago, with several Ibero-Armorican forms more closely related to each other than with to Romanian Allodaposuchus precedens.
西班牙昆卡省洛韦科的晚坎帕尼亚期—早马斯特里赫特期遗址出土了一组保存完好的鳄形类头骨和下颌遗骸，本文对此进行了描述，并将其归入一个新的基干真鳄类分类单元，巨齿洛韦科鳄（Lohuecosuchus megadontos），属名及种名均为新拟。对来自法国瓦尔省福克斯—安富的同期遗址的一具完整头骨进行重新评估后，我们得以确定这个新属的第二个物种。系统发育分析将洛韦科鳄置于一个仅由欧洲晚白垩世分类单元组成的分支中。这个在此定义为异鳄科（Allodaposuchidae）的新分支，被认为是同样由欧洲白垩纪类群组成的海鳄科（Hylaeochampsidae）的姐妹群。异鳄科和海鳄科被归入一个分支，该分支被确定为现存唯一的鳄形类谱系——鳄目（Crocodylia）的姐妹群。异鳄科在欧洲晚白垩世群岛呈现出替代分布模式，伊比利亚—阿莫里卡地区的几个类群彼此之间的亲缘关系比它们与罗马尼亚的先异鳄（Allodaposuchus precedens）更为密切。
