An anihoid snake from the Upper Cretaceous of northern Patagonia

被引：24
作者：
Gomez, Raul O. [1 ]
Baez, Ana M. [1 ]
Rougier, Guillermo W. [2 ]
机构：
[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Geol, Buenos Aires, DF, Argentina
[2] Univ Louisville, Dept Anat Sci & Neurobiol, Louisville, KY 40292 USA
来源：
CRETACEOUS RESEARCH | 2008年 / 29卷 / 03期
关键词：
serpentes; Anilioidea; Australophis; Cretaceous; Patagonia;
D O I：
10.1016/j.cretres.2008.01.002
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
We report the first record of anilioids from southern South America, a region where they do not live today. The fossils come from the Allen Formation (Late Campanian-Early Maastrichtian) at Bajo Trapalco and Bajo de Santa Rosa localities, Rio Negro province, Argentina. The remains consist of several vertebrae, most of which belong to the mid-posterior precloacal region of the column. Comparisons to other extant and extinct anilioid taxa indicate that these remains represent a new taxon, Australophis anilioides gen. et sp. nov. Australophis is morphologically closer to Palaeocene Hoffstetterella from Brazil and extant South American Anilius than to any other snake. These taxa might be closely related, in which case they would represent a lineage distinct from that including Cylindrophis and uropeltids. The two lineages must have diverged by the Late Cretaceous. (C) 2008 Elsevier Ltd. All rights reserved.
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页码：481 / 488
页数：8
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