Ornithischian remains from the Chorrillo Formation (Upper Cretaceous), southern Patagonia, Argentina, and their implications on ornithischian paleobiogeography in the Southern Hemisphere

被引：30
|
作者：
Rozadilla, Sebastian [1 ]
Agnolin, Federico [1 ,2 ]
Manabe, Makoto [3 ]
Tsuihiji, Takanobu [3 ,4 ]
Novas, Fernando E. [1 ]
机构：
[1] Museo Argentino Ciencias Nat Bernardino Rivadavia, CONICET, Lab Anat Comparada & Evoluc Vertebrados, Ave Angel Gallardo 470, Buenos Aires, DF, Argentina
[2] Univ Maimonides, Fdn Hist Nat Felix Azara, Dept Ciencias Nat & Antropol, CEBBAD, Hidalgo 775,Piso 7, Buenos Aires, DF, Argentina
[3] Univ Tokyo, Dept Earth & Planetary Sci, Bunkyo Ku, Hongo 1130033, Japan
[4] Natl Museum Nat & Sci, Dept Geol & Paleontol, Tsukuba, Ibaraki, Japan
来源：
CRETACEOUS RESEARCH | 2021年 / 125卷
关键词：
Ankylosauria; Hadrosauridae; Gasparinisaura; Chorillo Formation; Late Cretaceous Biotic Interchange; ORNITHOPOD DINOSAUR; ANKYLOSAUR DINOSAURIA; HUNGAROSAURUS-TORMAI; CHUBUT PROVINCE; FOSSIL EVIDENCE; NEUQUEN BASIN; 1ST RECORD; PHYLOGENY; REAPPRAISAL; STEGOSAURIA;
D O I：
10.1016/j.cretres.2021.104881
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
The fossil record of ornithischians in South America is sparse, and they are clearly underrepresented when compared with sauropod dinosaurs. However, recent discoveries indicate that ornithischians were more diversified than thought. The aim of the present contribution is to describe isolated remains belonging to ankylosaurs and ornithopods, including basal euiguanodontians and hadrosaurs coming from the Chorrillo Formation (upper Campanian-lower Maastrichtian), Santa Cruz province, southern Argentina. The fossil remains of ankylosaurs reported here are the southernmost recorded for the continent. They show a unique combination of plesiomorphic features, indicating that they may belong to a basal ankylosaur. Ankylosaurs and hadrosaurids are thought to have arrived in South America during the latest Cretaceous through Central America. However, a detailed overview of the fossil record of Gondwana indicates that both clades were present and probably diversified across southern continents. This indicates that their presence in South America may be alternatively interpreted as the result of migration from other landmasses, including Africa and Europe, or may even be the result of Jurassic-Early Cretaceous vicariance from their northern counterparts. (c) 2021 Elsevier Ltd. All rights reserved.
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页数：18
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