Erpetoichthys calabaricus has unusual cranio-vertebral anatomy, with an occipital centrum forming a component part of the compound basiexoccipital bone, and a 'free-floating' occipital neural arch that differs from accessory arches found in some teleosts. The occipital neural arch bears autapomorphic lateral projections that articulate with small rod-like bones resembling the spatial relationship of parapophyses and ribs, a feature normally restricted to vertebral centra. Based on analyses of cleared and stained specimens, computed tomography and histology, it is hypothesized that the lateral projections and associated rod-shaped bones are structures that share developmental homologies to the unique 'dorsal ribs' of Polypteridae. © 2008 The Authors.
Available at: http://works.bepress.com/kerin_claeson/6/
This article was published in Journal of fish biology, Volume 73, Issue 4, Pages 1075-1082.
The published version is available at 10.1111/j.1095-8649.2008.02007.x.Copyright © 2008 Scopus.