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Number and arrangement of extraocular muscles in primitive gnathostomes: evidence from extinct placoderm fishes

Young, Gavin


Exceptional braincase preservation in some Devonian placoderm fishes permits interpretation of muscles and cranial nerves controlling eye movement. Placoderms are the only jawed vertebrates with anterior/posterior obliques as in the jawless lamprey, but with the same function as the superior/inferior obliques of other gnathostomes. Evidence of up to seven extraocular muscles suggests that this may be the primitive number for jawed vertebrates. Two muscles innervated by cranial nerve 6 suggest...[Show more]

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
Source: Biology Letters
DOI: 10.1098/rsbl.2007.0545


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