Animal Kingdom Classification

Kingdom: Animalia (muliticellular, motile, heterotrophs)

(Branch A, Mesozoa) - cellular level, very simple

Phylum: Mesozoa

(Branch B, Parazoa) - cellular level, almost tissues, have mesohyl layer

Phylum: Parazoa (Porifera) sponges

Class: Calcarea

Class: Hexactinellida

Class: Demospongiae

(Branch C, Eumetazoa) - true tissues

(Grade I: Radiata)

Phylum: Cnidaria (stinging cells, radial)

Class: Hydrozoa (Hydra, Obelia, Gonionemus)

Class: Schyphozoa (jellyfish)

Class: Anthozoa (sea anemones)

Class: Cubozoa (sea wasps and relatives)

Phylum: Ctenophora (comb jellies)

(Grade II: Bilateria)

(Division A: Protostomia)

Acoelomates (without a coelom)

Phylum: Platyhelminthes (flatworms)

Class: Turbellaria (free living)

Class: Trematoda (endoparasitic)

Class: Monogenea (ecoparasitic)

Class: Cestoda (tapeworms)

(Phylum: Nemertertea (ribbon worms))

(Phylum: Gnathostomulida

(Pseudocoelomates)

Phylum: Nematoda (Ascaris, pinworm, hookworms, vinegar eels, Rhabditis

Phylum: Rotifera (rotifers)

Phylum: Netmatomorpha (horsehair worm)

(Eucoelomates)

Phylum: Mollusca (soft bodied)

Class: Monoplacophora (Neopolina)

Class: Polyplacophora (Chitons)

Class: Gastropoda (snails, slugs, limpets, abalone, whelks)

Class: Bivalvia (clams, mussels, scallops, oysters)

Class: Cephalopoda (squid, octopus, cuttlefish, chambered nautilus)

Phylum: Annelida (segmented worms)

Class: Polychaeta (Nereis, (marine worms))

Class: Oligochaeta (earthworm, tubifex worms)

Class: Hirudinea (leeches)

Phylum: Arthropoda (jointed legged)

Subphylum: Chelicerata (having chelicerae)

Class: Merostomata (horseshoe crab)

Class: Arachnida (spiders, scorpions, ticks, mites)

Subphylum: Crustacea (2 pr. Antennae, biramous appendages)

Class: Branchipoda (Daphnia (water flea), fairy shrimp, tadpole shrimp)

Class: Cirrepedia (acorn barnacle, gooseneck barnacle)

Class: Malocostraca (crabs, crayfish, lobster, shrimp)

Subphylum: Uniramia (appendages not branched)

Class: Diplopoda (millipedes)

Class: Chilopoda (centipedes)

Class: Insecta (grasshopper, cockroaches, butterfly, beetles, flies)

Phylum: Onychophora (Peripatus)

Phylum: Echinodermata (spiny skinned)

Class: Echinoidea (sea urchin)

Class: Holothuroidea (sea cucumber)

Class: Asteroidea (sea star, bat star)

Class: Opithuroidea (brittle star, serpent star)

Class: Crinoidea (feather star)

Phylum: Chordata

Group: Protochordata (no cranium, no vertebral column)

Subphylum: Urochordata (Tunicates or sea squirts)

Subphylum: Cephalochordata (Branchiostoma (Amphioxux) or lancelet)

Group: Craniata (cranium and vertebral column)

Subphylum: Vertebrata (backboned)

Superclass: Agnatha (no jaws, notochord persistent)

Class: Cephalaspidomorphi (lampreys)

Class: Myxini (hagfishes)

Superclass: Gnathostomata (jaws present, notochord replaced by vertebral column)

Class: Chondrichtheyes (sharks, rays, skates, chimaeras)

Class: Actinopterygii (ray-finned fishes)

Class: Sarcopterygii (lobe-finned fishes)

Class: Amphibia (frogs, salamanders, newts, cecilians)

Class: Reptilia (snakes, lizards, crocodilians, turtles, and others)

Class: Aves (birds)

Class: Mammalia (mammals)