A new giant basal titanosaur sauropod in the Upper Cretaceous (Coniacian) of the Neuquen Basin, Argentina

被引：15
|
作者：
Filippi, Leonardo S. [1 ]
Salgado, Leonardo [2 ,3 ]
Garrido, Alberto C. [4 ,5 ]
机构：
[1] Museo Municipal Argentino Urquiza, Jujuy & Chaco S-N, RA-8319 Rincon De Los Sauces, Neuquen, Argentina
[2] Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina
[3] Univ Nacl Rio Negro, Inst Invest Paleobiol & Geol, Conicet, Av Gral JA Roca 1242, RA-8332 Gen Roca, Rio Negro, Argentina
[4] Direcc Prov Mineria Etcheluz & Ejercito Argentino, Museo Prov Ciencias Nat Prof Dr Juan A Olsacher, RA-8340 Zapala, Neuquen, Argentina
[5] Univ Nacl Comahue, Fac Ingn, Dept Geol & Petr, RA-1400 Buenos Aires, DF, Argentina
来源：
CRETACEOUS RESEARCH | 2019年 / 100卷
关键词：
Sauropoda; Titanosauria; Upper Cretaceous; Neuquen Group; Sierra Barrosa Formation; Patagonia; RAPETOSAURUS-KRAUSEI SAUROPODA; JURASSIC MORRISON FORMATION; SP-NOV; DINOSAURIA SAUROPODA; ALAMOSAURUS-SANJUANENSIS; EVOLUTIONARY HISTORY; PLOTTIER FORMATION; CRANIAL ANATOMY; BAURU GROUP; PATAGONIA;
D O I：
10.1016/j.cretres.2019.03.008
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
A new basal sauropod titanosaur, Kaijutitan maui gen. et sp. nov., is described. The holotype of this species, which comes from the Sierra Barrosa Formation (upper Coniacian, Upper Cretaceous), consists of cranial, axial, and appendicular elements presenting an unique combination of plesiomorphic and apomorphic characters. The most notable characteristic observed in Kaijutitan is the presence of anterior cervical vertebrae with bifid neural spines, a condition that would have evolved several times among sauropods. The phylogenetic analysis places Kaijutitan as a basal titanosaur, the sister taxon of Epachthosaurus + Eutitanosauria. The new species supports the coexistence, in the Late Cretaceous (Turonian-Santonian), of basal titanosaurs and eutitanosaurian sauropods, at least in Patagonia. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：61 / 81
页数：21
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