Phyla and Classes
Sponges
Phylum Porifera
Comb Jelly
Phylum Ctenophora
Class: Hydrozoa, Scyphozoa, Cubozoa, Anthozoa
Phylum Cnidaria (4 classes)
Hydras and Portuguese man-of-war
Class: Hydrazoa (Phylum Cnidaria)
Jellyfish and Sea Nettles
Class: Scyphozoa (Phylum Cnidaria)
Box Jellies and Sea Wasps
Class: Cubozoa (Cnidaria)
Sea Anemone, most Corals, Sea Fans
Class: Anthozoa (Cnidaria)
Class: Turbellaria, Monogenaea, Trematoda, Cestoda
Phylum: Platyhelminthes [Flatworms (4 classes)]
Free-Living Flatworms, eg Planaria
Class: Turbellaria (Phylum Platyhelminthes)
primarily ectoparasites of fish
Class: Monogenaea (Phylum Platyhelminthes)
Trematodes or Flukes
Class: Trematoda (Endoparasites) (Phylum Platyhelminthes)
Tapeworms
Class: Cestoda (Phylum Platyhelminthes)
Bryozoans or Moss Animals
Phylum Ectoprocta
Lamp Shells
Phylum Brachiopoda
Ribbon or Proboscis Worms
Phylum Nemertea
Class: Oligochaeta, Polychaeta, Hirudinea
Phylum Annelida [Segmented Worms (3 classes)]
Earthworms
Class: Oligochaeta (Phylum Annelida)
Polychaeta
Class: Polychaeta (Phylum Annelida)
Leeches
Class: Hirudinea (Phylum Annelida)
Class: Polyplacophora, Bivalvia, Gastropoda, Cephalopoda
Phylum Mollusca (4 classes)
Chitons
Class: Polyplacophora (Phylum Mollusca)
Clams, Oysters, Scallops, and Mussels
Class: Bivalvia (Phylum Mollusca)
Abalone, Limpet, Conch, Mudibranchs, Snails, Slugs, etc.
Class: Gastropoda (Phylum Mollusca)
Squid, Octopus, Nautilus, Cuttlefish
Class: Cephalopoda (Phylum Mollusca)
Roundworms
Phylum Nematoda
Subphylum: Trilobita, Cheliceriformes, Myriapoda, Crustacea, Hexapoda
Phylum Arthropoda (5 subphylum)
Trilobites
Subphylum: Trilobita (Phylum Arthropoda)
Spiders, Mites, Scorpions, Horseshoe Crabs
Subphylum: Cheliceriformes (Phylum Arthropoda)
Centipedes and Millipedes
Subphylum: Myriapoda (Phylum Arthropoda)
Lobsters, Crabs, Barnacles, Amphipods, Isopods, etc.
Subphylum: Crustacea (Phylum Arthropoda)
Insects and Relatives
Subphylum: Hexapoda (Phylum Arthropoda)
Acorn Worms
Phylum Hemichordata
Class: Asteroidea, Ophiuroidea, Echinoidea, Crinoidea, Holothuroidea
Phylum Echinoderma (5 classes)
Sea Stars
Class: Asteroidea (Phylum: Echinoderma)
Brittle Stars
Class: Ophiuroidea (Phylum: Echinoderma)
Sea Urchins, Sand Dollars
Class: Echinoidea (Phylum: Echinoderma)
Sea Lilies and Feather Stars
Class: Crinoidea (Phylum: Echinoderma)
Sea Cucumbers
Class: Holothuroidea (Phylum: Echinoderma)
Subphylum: Urochordata, Cephalachordata, Craniates, Gnathostomes, Osteichthyes, Tetrapods, Amniotes
Phylum Chordata (7 subphylum)
Tunicates or Sea Squirts
Subphylum: Urochordata (Phylum Chordata)
Lancelets
Subphylum: Cephalachordata (Phylum Chordata)
Class: Myxini, Cephalaspidomorphi
Subphylum: Craniates (its classes) (Phylum Chordata)
Hagfish
Class: Myxini [Subphylum Craniates (Phylum Chordata)]
Lamprey
Class: Cephalasidomorphi [Subphylum Craniates (Phylum Chordata)]
Class: Chondrichthyes
Subphylum: Gnathostomes [Jawed Vertebrates (its class)] (Phylum Chordata)
Sharks, Rays, and Chimaeras
Class: Chondrichthyes; Subphylum: Gnathostomes [Jawed Vertebrates] (Phylum Chordata)
Class: Actinopterygii, Actinistia, Dipnoi
Subphylum: Osteichthyes [Boney Fishes (its classes)] (Phylum Chordata)
Ray-Finned Fishes
Class: Actinopterygii Subphylum: Osteichthyes [Boney Fishes (its classes)] (Phylum Chordata)
Coelacanths
Class: Actinistia; Subphylum: Osteichthyes [Boney Fishes (its classes)] (Phylum Chordata)
Lungfish
Class: Dipnoi; Subphylum: Osteichthyes [Boney Fishes (its classes)] (Phylum Chordata)
Class: Amphibia
Subphylum: Tetrapods [Four-limbed Vertebrates (its class)] (Phylum Chordata)
Salamanders, Frogs, Caecilians
Class: Amphibia; Subphylum: Tetrapods [Four-limbed Vertebrates (its class)] (Phylum Chordata)
Class: Reptilia, Mammalia
Subphylum: Amniotes [Vertebrates with Amniotic Eggs (its classes)] (Phylum Chordata)
Turtles, Crocs, Dinosaurs, Birds, Tuatara, Squamates
Class: Reptilia; Subphylum: Amniotes [Vertebrates with Amniotic Eggs (its classes)] (Phylum Chordata)
Monotremes (platypus), Marsupials(possums, kangaroo), Eutherians (primates, rodents)
Class: Mammalia; Subphylum: Amniotes [Vertebrates with Amniotic Eggs (its classes)] (Phylum Chordata)