Document Detail

Nonavian feathers in a late Triassic archosaur.
MedLine Citation:
PMID:  10864867     Owner:  NLM     Status:  MEDLINE    
Longisquama insignis was an unusual archosaur from the Late Triassic of central Asia. Along its dorsal axis Longisquama bore a series of paired integumentary appendages that resembled avian feathers in many details, especially in the anatomy of the basal region. The latter is sufficiently similar to the calamus of modern feathers that each probably represents the culmination of virtually identical morphogenetic processes. The exact relationship of Longisquama to birds is uncertain. Nevertheless, we interpret Longisquama's elongate integumentary appendages as nonavian feathers and suggest that they are probably homologous with avian feathers. If so, they antedate the feathers of Archaeopteryx, the first known bird from the Late Jurassic.
T D Jones; J A Ruben; L D Martin; E N Kurochkin; A Feduccia; P F Maderson; W J Hillenius; N R Geist; V Alifanov
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  288     ISSN:  0036-8075     ISO Abbreviation:  Science     Publication Date:  2000 Jun 
Date Detail:
Created Date:  2000-07-13     Completed Date:  2000-07-13     Revised Date:  2007-03-19    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2202-5     Citation Subset:  IM    
Department of Zoology, Oregon State University, Corvallis, OR 97331, USA.
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MeSH Terms
Birds* / anatomy & histology
Feathers* / anatomy & histology
Reptiles / anatomy & histology*
Comment In:
Science. 2001 Mar 9;291(5510):1899-902   [PMID:  11245191 ]

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