THE ORIENTATION OF DIGITAL CLAWS IN BIRDS

Authors
Citation
B. Stephan, THE ORIENTATION OF DIGITAL CLAWS IN BIRDS, Journal fur Ornithologie, 135(1), 1994, pp. 1-16
Citations number
14
Language
TEDESCO
art.tipo
Article
Categorie Soggetti
Ornithology
Journal title
ISSN journal
0021-8375
Volume
135
Issue
1
Year of publication
1994
Pages
1 - 16
Database
ISI
SICI code
0021-8375(1994)135:1<1:TOODCI>2.0.ZU;2-R
Abstract
As a result of pronation of the forelimb in the spread wing the peaks of the digital claws am orientated backwards. The 6th (Solnhofen) spec imen of Archaeopteryx demonstrates that its digital claws were orienta ted in the same way. Given is an interpretation of the position of the claws of Berlin and Eichstatt specimen. Shown are the consequences fo r theories of origin of birds' flight, functions of the digital claws and other problems.