Document Detail


First record of live birth in Cretaceous ichthyosaurs: closing an 80 million year gap.
MedLine Citation:
PMID:  12952650     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
New fossils of embryonic ichthyosaurs are both the geologically youngest and the physically smallest known ichthyosaur embryos. The embryos are articulated, though only partially preserved, and are located within the body cavity of an adult, presumably the mother. The embryos and adult were found in association with several other individuals of differing size classes, all of which appear to be a new taxon of Cretaceous ichthyosaur. The material was collected from units of the Loon River Formation, Hay River, Northwest Territories, Canada. The implications of this new material to ichthyosaurian reproductive biology are discussed.
Authors:
Erin E Maxwell; Michael W Caldwell
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  270 Suppl 1     ISSN:  0962-8452     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-09-03     Completed Date:  2003-11-04     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  S104-7     Citation Subset:  IM    
Affiliation:
Departments of Earth and Atmospheric Sciences, and Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada.
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MeSH Terms
Descriptor/Qualifier:
Animals
Embryo, Nonmammalian / physiology
Female
Fishes / embryology,  physiology*
Fossils
Northwest Territories
Paleontology / methods*
Reproduction
Comments/Corrections

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