The vertebrate body plan emerged in concert with extensive changes to anterior chordate morphology, including assembly of a craniofacial skeleton, expansion of the anterior neuroepithelium into a ...

The interrelationships between major living vertebrate, and even chordate, groups are now reasonably well resolved thanks to a large amount of generally congruent data derived from molecular sequences ...

Those of you who took high school biology may remember the lancelet, also known as the amphioxus. Its simplified body plan is notable for containing a number of features that it shares in common with ...

v. 1. Propaedeutics to comparative neurology.--v. 2. Invertebrates and origin of vertebrates.--v. 3, pt. 1. Structural elements: biology of nervous tissue.--v. 3, pt ...