This is a simplified evolutionary tree of six representative animal phyla, illustrating differences in body form, habitat, and species numbers among them. This visual may only be used in ...
Our collections cover all of the living invertebrate phyla, including Onychophora (velvet worms), Chaetognatha (arrow worms), Gastrotricha (hairybacks), Kinorhyncha (mud dragons), Nemertea (ribbon ...