Deep homologies in the pharyngeal arches

PvM has already written a bit about this issue in the article "Human Gland Probably Evolved From Gills", but I'm not going to let the fact that I'm late to the party stop me from having fun with it. This is just such a darned pretty story that reveals how deeply vertebrate similarities run, using multiple lines of evidence.

Continue reading "Deep homologies in the pharyngeal arches" (on Pharyngula)