The origin of snakes (Serpentes) as seen through eye anatomy

57Citations
Citations of this article
366Readers
Mendeley users who have this article in their library.
Get full text

Abstract

Snakes evolved from lizards but have dramatically different eyes. These differences are cited widely as compelling evidence that snakes had fossorial and nocturnal ancestors. Their eyes, however, also exhibit similarities to those of aquatic vertebrates. We used a comparative analysis of ophthalmic data among vertebrate taxa to evaluate alternative hypotheses concerning the ecological origin of the distinctive features of the eyes of snakes. In parsimony and phenetic analyses, eye and orbital characters retrieved groupings more consistent with ecological adaptation rather than accepted phylogenetic relationships. Fossorial lizards and mammals cluster together, whereas snakes are widely separated from these taxa and instead cluster with primitively aquatic vertebrates. This indicates that the eyes of snakes most closely resemble those of aquatic vertebrates, and suggests that the early evolution of snakes occurred in aquatic environments. © 2004 The Linnean Society of London.

Cite

CITATION STYLE

APA

Caprette, C. L., Lee, M. S. Y., Shine, R., Mokany, A., & Downhower, J. F. (2004). The origin of snakes (Serpentes) as seen through eye anatomy. Biological Journal of the Linnean Society, 81(4), 469–482. https://doi.org/10.1111/j.1095-8312.2003.00305.x

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free