New palaeothentid marsupial from the middle Miocene of Bolivia

被引:16
|
作者
Goin, FJ
Sánchez-Villagra, MR
Kay, RF
Anaya-Daza, F
Takai, M
机构
[1] Museo La Plata, Dept Vertebrate Paleontol, RA-1900 La Plata, Argentina
[2] Univ Tubingen, Inst Zool, D-72706 Tubingen, Germany
[3] Duke Univ, Med Ctr, Dept Biol Anthropol & Anat, Durham, NC 27710 USA
[4] Univ Autonoma Tomas Frias, Fac Ingn Geol, Potosi, Bolivia
[5] Kyoto Univ, Primate Res Inst, Aichi 484, Japan
关键词
Marsupialia; Palaeothentidae; Caenolestidae; Bolivia; Miocene; anatomy;
D O I
10.1111/j.0031-0239.2003.00300.x
中图分类号
Q91 [古生物学];
学科分类号
0709 ; 070903 ;
摘要
The new species Acdestis maddeni is described based on the most complete skull of a palaeothentid marsupial known so far. The skull preserves most of the upper dentition and of the ear region, the latter an anatomical region previously unknown in this extinct family. A right maxillary fragment including C-M2 also belongs to the new species. The specimens come from the middle Miocene localities of Rosario and Quebrada Honda in southernmost Bolivia. The generic allocation of the new species is somewhat problematic, given that most of the taxonomy of fossil palaeothentids is based on lower dentitions. Compared to that of caenolestids, the skull of A. maddeni is much larger, with a shorter and broader snout, a proportionally narrower interorbital constriction, and a less globular, more triangular-shaped braincase in dorsal view.
引用
收藏
页码:307 / 315
页数:9
相关论文
共 50 条