The Invertebrates

Allows users to rapidly and accurately identify or describe particular species. Presents full descriptions of the major anatomical features of different invertebrate groups as well as definitions of the terms used to describe significant variations of these features. It covers 77 living invertebrate taxa, most on a phylum or class level.

SYSTEMATIC SECTION. Placozoa. Mesozoa. Porifera. Cnidaria. Ctenophora. Platyhelminthes. Gnathostomulida. Nemertini. Entoprocta (Kamptozoa). Gastrotricha. Nematoda. Nematomorpha. Kinorhyncha. Loricifera. Priapulida. Rotatoria (Rotifera). Acanthocephala. Echiurida. Sipunculida. Mollusca. Annelida. Onychophora. Tardigrada. Arthropoda. Pentastomida. Lophophorata (Tentaculata). Chaetognatha. Echinodermata. Pterobranchia. Enteropneusta. Pogonophora. Tunicata (Urochordata). Acrania (Cephalochordata). ADJECTIVE SECTION. Index.