DENTITION AND SYSTEMATIC RELATIONSHIPS OF ALTANIUS-ORLOVI (MAMMALIA, PRIMATES) FROM THE EARLY EOCENE OF MONGOLIA

被引：30
作者：
GINGERICH, PD
DASHZEVEG, D
RUSSELL, DE
机构：
[1] Museum of Paleontology, The University of Michigan, Ann Arbor
[2] Department of Paleontology and Stratigraphy, Geological Institute, Mongolian Academy of Science, Ulan Bator
[3] Institut de Paléontologie, Muséum National d'Histoire Naturelle, Paris, 75005
来源：
GEOBIOS | 1991年 / 24卷 / 05期
关键词：
PRIMATES; TARSIOIDEA; OMOMYIDAE; ALTANIUS; EOCENE; MONGOLIA;
D O I：
10.1016/0016-6995(91)80029-Y
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
New specimens of Altanius orlovi are described from the type area, Tsagan-Khushu, in Mongolia. These include the first dentary preserving alveoli for anterior teeth, which show the lower dental formula of Altanius to have been 2.1.4.3. Lower incisors were small, equal in size, and nearly vertical in emplacement. The lower canine alveolus is larger than alveoli for the incisors and larger than that for P1. Alveoli show P1 to have been single-rooted and P2 double-rooted. Upper premolars lack a paraconule. and M1-2 have a short Nannopithex-fold rather than a full postprotocingulum joining the posterior cingulum. Altanius is one of the smallest primates known. Morphological comparisons with Teilhardina and Cantius indicate that Altanius is more generalized and primitive than other Omomyidae or Adapidae. Altanius is clearly one of the most primitive primates known to date.
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页码：637 / 646
页数：10
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