| Contents Notes |
Free-living protozoans, phylum protozoa -- Sponges, phylum porifera -- Coelenterates, phylum coelenterata -- Rotifers, phylum rotatoria -- Gastrotrichs, phylum gastrotricha -- Roundworms, phylum nematoda -- Horsehair worms, phylum nematomorpha -- Flatworms, phylum platyhelminthes -- Free-living flatworms, class turbellaria -- Water bears, phylum tardigrada -- Bryozoans, phylum bryozoa -- Segmented worms, phylum annelida -- Freshwater oligochaetes, class oligochaeta -- Earthworms, class oligochaeta -- Leeches, class hirudinea -- Molluscs, phylum molusca -- Freshwater clams, class pelecypoda -- Snails, class gastropoda -- Arthropods, phylum arthropoda -- Crustaceans, class crustacea -- Ostracods, subclass ostracoda -- Cladocerans, order cladocera -- Copepods, subclass copepoda -- Malacostracans, subclass malacostraca -- Aquatic insects, class insecta -- Arachnids, class arachnida -- Pseudoscorpions, order pseudoscorpionida -- Spiders, order araneae -- Harvestmen, order phalangida -- Ticks and mites, order acari -- Millipedes, class diplopoda, and centipedes, class chilopoda -- Chordates, phylum chordata -- Vertebrates, subphylum vertebrata -- Lampreys, class agnatha -- Bony fishes, class osteichthyes -- Ray-finned fishes, subclass actinopterygii -- Amphibians, class amphibia -- Reptiles, class reptilia -- Mammals, class mammalia. |
