A juvenile plesiosaur (Plesiosauria: Reptilia) from the Lower Lias (Hettangian: Lower Jurassic) of Lyme Regis, England: a pliosauroid‐plesiosauroid intermediate?
作者:
ARTHUR R. I. CRUICKSHANK,
期刊:
Zoological Journal of the Linnean Society
(WILEY Available online 1994)
卷期:
Volume 112,
issue 1‐2
页码: 151-178
ISSN:0024-4082
年代: 1994
DOI:10.1111/j.1096-3642.1994.tb00316.x
出版商: Blackwell Publishing Ltd
关键词: Eurycleidus;Hettangian;phylogeny;functional anatomy
数据来源: WILEY
摘要:
A partial skull and skeleton of a small, juvenile plesiosaur, part of the historically important Philpot Collection from Lyme Regis, England, is described. It is assigned tentatively toEwycMdus arcuatus(Owen, 1840) and has a mosaic of features which make it difficult to place in a superfamily. The characters of the posterior elements of the skull and post‐dentary bones are close to those expected in a plesiosauroid, whereas the anterior dentition and symphysis of the lower jaw are more typical of a pliosauroid. The specimen is placed in the Pliosauroidea pending a phylogenetic revision of the Lower Jurassic Plesiosauria. From a reconstruction of the dentition and jaw‐closing muscles, it is thought to have been a predator on soft‐bodied or lighdy armoured prey, such as belemnoids, ammonites or small
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