A survey of the phyla of invertebrate animals. Discussions include their physiology, development, morphology, behavior, ecology and adaptations. Corequisite: 81.308 ...

But then in the blink of an eye on a geological timescale, the first major animal phyla appeared, including arthropods, mollusks, echinoderms, and early vertebrates. This was a period of intense ...

Our collections cover all of the living invertebrate phyla, including Onychophora (velvet worms), Chaetognatha ... (horseshoe worms), Priapulida (penis worms), Rotifera (wheel animals) and Tardigrada ...