ON REMAINS OF EXTINCT PROBOSCIDEA IN THE MUSEUMS OF GEOLOGY AND ZOOLOGY IN THE UNIVERSITY OF CAMBRIDGE PART I.ELEPHAS ANTIQUUS.
作者:
C. FORSTER COOPER,
期刊:
Biological Reviews
(WILEY Available online 1924)
卷期:
Volume 1,
issue 2
页码: 108-120
ISSN:1464-7931
年代: 1924
DOI:10.1111/j.1469-185X.1924.tb00540.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Summary.It appears that the Barrington and HaverhillElephasis somewhat distinct from other forms ofantiquusby its higher laminar frequence. As far as is known it was a form with small molar teeth. The fact that there is no great variation in size may be due to the small number of specimens measured but is none the less interesting. The light they throw on the geological level of the beds in which they occur is obscure, but on the whole the period seems to be early rather than late and may be placed provisionally near the top of the Pliocene.The Whittlesea forms appear to be equivalent in their general stage of evolution to those from Clacton, etc. Even in the few specimens discovered there is a wide range of variation in size which would includeausoniusat one end and approach the largest and latest forms ofantiquusat the other. Certain of them however are not unlikeausoniusso that the value of this form as a time mutation appears to be somewhat impaired.
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