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Titolo:
Redescription, palaeobiogeography and palaeoecology of Coniasaurus crassidens Owen, 1850 (Squamata) from the Lower Chalk (Cretaceous; Cenomanian) of SE England
Autore:
Caldwell, MW; Cooper, JA;
Indirizzi:
Field Museum Nat Hist, Dept Geol, Chicago, IL 60605 USA Field Museum Nat Hist Chicago IL USA 60605 pt Geol, Chicago, IL 60605 USA Univ Alberta, Ctr Biol Sci, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada Univ Alberta Edmonton AB Canada T6G 2E9 Sci, Edmonton, AB T6G 2E9, Canada Booth Museum Nat Hist, Brighton BN1 5AA, E Sussex, England Booth Museum Nat Hist Brighton E Sussex England BN1 5AA E Sussex, England
Titolo Testata:
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
fascicolo: 4, volume: 127, anno: 1999,
pagine: 423 - 452
SICI:
0024-4082(199912)127:4<423:RPAPOC>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
MODEL;
Keywords:
squamates; dolichosaurs; mosasaurs; palaeoecology; palaeobiogeography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
62
Recensione:
Indirizzi per estratti:
Indirizzo: Caldwell, MW Canadian Museum Nat, Div Res, POB 3443 Stn D, Ottawa, ON K1P 6P4, Canada Canadian Museum Nat POB 3443 Stn D Ottawa ON Canada K1P 6P4 a
Citazione:
M.W. Caldwell e J.A. Cooper, "Redescription, palaeobiogeography and palaeoecology of Coniasaurus crassidens Owen, 1850 (Squamata) from the Lower Chalk (Cretaceous; Cenomanian) of SE England", ZOOL J LINN, 127(4), 1999, pp. 423-452

Abstract

Type and referred specimens of Coniasaurus crassidens from the Lower Chalk(Upper Cretaceous; Cenomanian) of southeast: England, are re-described. The type is a left maxilla associated with 14 dorsal vertebrae. The maxilla is elongate, bears a low ascending process, and has a long and posteriorly positioned external narial margin. The first maxillary tooth is pointed and bears a groove on the labial face; more posterior maxillary teeth are increasingly rounded and bulbous, and have a single groove on the labial face. Mandibles assigned to Coniasaurus cf. C. crassidens possess teeth of similarform; mandibular bones include the dentary, splenial, angular, coronoid, prearticular, and surangular. A number of features show important similarities to later mosasaurs and contemporaneous groups such as dolichosaurs. These new data provide a very different picture of coniasaurs and their mode oflife in the early Upper Cretaceous. The functional morphology of coniasaurteeth is unique and shows occlusion between the lingual platforms of the upper teeth with the crowns of the lower teeth. Coniasaurs can be consideredas analgous to small sauropterygians in terms of general morphology, habitats, and trophic structure. Coniasaur distributions in the Cenomanian and Turonian of Europe and North America are similar to the palaeobiogeographic patterns of other organisms living in the Tethys and SuperTethys Seaway. (C) 1999 The Linnean Society of London.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 08:36:56