期刊
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
卷 45, 期 -, 页码 1-5出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsames.2013.01.004
关键词
Late Pleistocene; South America; Procyonidae; Procyon cancrivorus; Brazil; Tocantins
资金
- CNPq [401812/2010-3]
- CNPq (Edital MCT/CNPq) [32/2010]
- ANPCyT [PICT 0804, 1744]
- CONICET [PIP 0436, 0270]
- UNLP [PI 11/N645, 11/N568]
Although five genera of procyonids are currently present in South America, only two of the extant genera, Procyon and Nasua are represented in the South American fossil record. A recent discovery of a procyonid lower second molar in Late Pleistocene deposits of Aurora do Tocantins, northern Brazil, offers potential to further our understanding of the stratigraphic and temporal range of South American fossil procyonids. We use geometric morphometric analysis of two-dimensional landmarks and semiland-marks to explore morphological variation in the lower second molars of extant Procyon lotor and Procyon cancrivorus and multivariate methods to support the identification of the Pleistocene specimen as P. cancrivorus. This material represents the second fossil record of P. cancrivorus in South America Procyonids entered South America in two phases: the first comprising by Cyonasua and Chapadmalania during the Late Miocene, and the other recent genera, beginning in the Late Pleistocene. These Late Miocene procyonids were more carnivorous than Late Pleistocene-Recent omnivorous taxa and possible went extinct due to competition with other placental camivorans that entered South America and diversified during the latest Pliocene-Early Pleistocene. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据