Title
The head of the finch: the anatomy of the feeding system in two species of finches (**Geospiza fortis** and **Padda oryzivora**) The head of the finch: the anatomy of the feeding system in two species of finches (**Geospiza fortis** and **Padda oryzivora**)
Author
Faculty/Department
Faculty of Sciences. Biology
Faculty of Sciences. Physics
Publication type
article
Publication
London ,
Subject
Biology
Human medicine
Source (journal)
Journal of anatomy. - London
Volume/pages
219(2011) :6 , p. 676-695
ISSN
0021-8782
ISI
000297412200003
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Despite the large number of studies devoted to the evolution of beak shape in Darwins finches, surprisingly little is known about the morphology of the skull and jaw musculature in these birds. Moreover, it remains currently unclear whether Darwins finches are unusual in their cranial morphology compared with other seed-cracking birds. Here, we provide a detailed description of the morphology of the cranial system in the medium ground finch (Geospiza fortis) and compare it with that of another seed-cracking bird of similar overall size and appearance, the Java finch (Padda oryzivora). Our data show an overall similarity in beak size and cranial morphology. Yet, differences in the jaw adductor size and corresponding attachments to the cranium and mandible are prominent, with the medium ground finch having much more robust jaw-closing muscles. This is reflected in differences in bite forces, with the medium ground finch biting much harder than the Java finch. These data suggest similarities in the evolution of the feeding system in birds specializing in the cracking of hard seeds, but also show the uniqueness of the cranial morphology and bite force of the medium ground finch compared with other seed-cracking birds.
E-info
https://repository.uantwerpen.be/docman/iruaauth/883ca5/fa324e1157f.pdf
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