PORIFERANS

CNIDARIANS

Class HIDROZOA

Class SCIPHOZOA

Class ANTHOZOA

PLATHYHELMINTHES

NEMATODES

ANNELIDS

Class POLYCHAETES

Class OLIGOCHAETES

Class HIRUDINEA

MOLLUSCS

Class GASTROPODS

Class BIVALVS

Class CEPHALOPODS

Class POLYPLACOPHORS

Class SCAPHOPODS

ARTHROPODS

MYRIAPODS

CRUSTACEANS

CHELICERADS

INSECTS

ECHINODERMS

Class ECHINOIDEA

Class ASTEROIDEA

Class HOLOTHUROIDEA

Class OPHIUROIDEA

Class CRINOIDEA

CHORDATES

UROCHORDATA

CEPHALOCHORDATA

VERTEBRATA