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Skeletal Elements Within Teleost Eyes and a Discussion of Their Homology by Tamara A. Franz-Odendaal; Brian K. Hall is a Environmental Science article available to read on EtoBox.

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## Abstract Scleral ossicles and scleral cartilages form part of the craniofacial skeleton of many vertebrates. Some vertebrates, including all birds and most reptiles, but excluding most mammals, have scleral cartilages as well as scleral ossicles supporting their eyes. The teleost equivalent of these elements has received little attention in the literature. From radiographic and whole‐mount analyses of over 400 individuals from 376 teleost species, we conclude that the teleost scleral skeletal elements (ossicles and cartilage) differ significantly from those of reptiles (including birds). Scleral ossicles in teleosts have different developmental origins, different positions within the eyeball, and different relationships with the scleral cartilaginous element than those in reptiles. From whole‐mount staining of a growth series of four species of teleost (__Danio rerio, Salmo salar, Esox lucius,__ and __Alosa pseudoharengus__), we interpret the development of these elements and show that they arise from within an Alcian blue‐staining cartilaginous ring that develops around the eye earlier in development. We present possible scenarios on the evolution of these scleral skeletal elem

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Author

Tamara A. Franz-Odendaal; Brian K. Hall

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0362-2525)

Published

2006

Language

EN

Field

Environmental Science (Physical Sciences)