Information on Invertebrates
| Phylum | SubPhylum | Class | Common Example | True tiss | Symmetry | Germ layer |
| Porifera | N/A | Sponges | No | Rad or none | cells | |
| Cnidaria | N/A | Hydrozoa | Hydra | Yes | Radial | Diploblastic |
| Cnidaria | N/A | Scyphozoa | True Jellyfish | Yes | Tetra Rad | Diploblastic |
| Cnidaria | N/A | Anthozoa | Sea Anenome | Yes | Radial | Diploblastic |
| Ctenophora | N/A | Comb Jellies | Yes | Biradial | Diploblastic | |
| Platyhelminthes | N/A | Turbellaria | Freeliv Flatworms | Yes | Bilateral | Triploblastic |
| Platyhelminthes | N/A | Monogenea | Ectopar flatworms | Yes | Bilateral | Triploblastic |
| Platyhelminthes | N/A | Trematoda | Flukes | Yes | Bilateral | Triploblastic |
| Platyhelminthes | N/A | Cestoda | Tapeworms | Yes | Bilateral | Triploblastic |
| Rotifera | N/A | Rotifers | Yes | Bilateral | Triploblastic | |
| Nematoda | N/A | Round worms | Yes | Bilateral | Triploblastic | |
| Nemertea | N/A | Proboscis worm | Yes | Bilateral | Triploblastic | |
| Byrozoa | N/A | Colonial Lophphorates | Yes | Bilateral | Triploblastic | |
| Phoronida | N/A | Marine tube worms | Yes | Bilateral | Triploblastic | |
| Brachiopoda | N/A | Lamp shells | Yes | Bilateral | Triploblastic | |
| Molluska | N/A | Polyplacophora | Chitons | Yes | Bilateral | Triploblastic |
| Molluska | N/A | Gastropoda | Slugs & Snails | Yes | Bilateral | Triploblastic |
| Molluska | N/A | Bivalvia | Clams, oysters | Yes | Bilateral | Triploblastic |
| Molluska | N/A | Cephalopoda | Squid,Octo, Naut | Yes | Bilateral | Triploblastic |
| Annelida | N/A | Polychaeta | Polychaete worms | Yes | Bilateral | Triploblastic |
| Annelida | N/A | Oligochaeta | Earthworm-like | Yes | Bilateral | Triploblastic |
| Annelida | N/A | Hirudnea | leeches | Yes | Bilateral | Triploblastic |
| Arthropoda | Chelicerata | Arachnida | Spiders, Scorpions | Yes | Bilateral | Triploblastic |
| Arthropoda | Chelicerata | Merostomata | Horseshoe crabs | Yes | Bilateral | Triploblastic |
| Arthropoda | Chelicerata | Pycnogonida | Sea spiders | Yes | Bilateral | Triploblastic |
| Arthropoda | Crustecea | Malocostraca | Crabs, Lobster, shrimp | Yes | Bilateral | Triploblastic |
| Arthropoda | Myriopoda | Diplopoda | Millipedes | Yes | Bilateral | Triploblastic |
| Arthropoda | Myriopoda | Chilopoda | Centipedes | Yes | Bilateral | Triploblastic |
| Arthropoda | Hexapoda | Insecta | Insects | Yes | Bilateral | Triploblastic |
| Onychophora | Walking Worms | Yes | Bilateral | Triploblastic | ||
| Echinodermata | Asteroidea | Sea Stars | Yes | 2ndary radial, pent | Triploblastic | |
| Echinodermata | Ophiuroidea | Brittle stars | Yes | 2ndary radial, pent | Triploblastic | |
| Echinodermata | Echinoidea | Sea Urchin, Sand Dollar | Yes | 2ndary radial, pent | Triploblastic | |
| Echinodermata | Holothuroidea | Sea cucumbers | Yes | 2ndary radial, pent | Triploblastic | |
| Echinodermata | Crinoidea | Sea lily, feather star | Yes | 2ndary radial, pent | Triploblastic | |
| Hemichordata | Acorn worms | Yes | Bilateral | Triploblastic | ||
| Phylum | Class | Coelom | Cleavage | Cleavage II | Coleom Dev | Blastopore |
| Porifera | N/A | N/A | N/A | N/A | None, - | |
| Cnidaria | Hydrozoa | N/A | N/A | N/A | N/A | mouth/anus |
| Cnidaria | Scyphozoa | N/A | N/A | N/A | N/A | mouth/anus |
| Cnidaria | Anthozoa | N/A | N/A | N/A | N/A | mouth/anus |
| Ctenophora | N/A | N/A | N/A | N/A | mouth/anus | |
| Platyhelminthes | Turbellaria | Acoelomate | N/A | N/A | N/A | mouth/anus |
| Platyhelminthes | Monogenea | Acoelomate | N/A | N/A | N/A | mouth/anus |
| Platyhelminthes | Trematoda | Acoelomate | N/A | N/A | N/A | mouth/anus |
| Platyhelminthes | Cestoda | Acoelomate | N/A | N/A | N/A | mouth |
| Rotifera | Pseudocoelomate | N/A | N/A | N/A | mouth | |
| Nematoda | Pseudocoelomate | N/A | N/A | N/A | mouth | |
| Nemertea | Remnant Coleome | Unique | Determinate | unique | Mouth | |
| Byrozoa | Coelomate | Sprial | Determinate | Schizocoelus | Mouth | |
| Phoronida | Coelomate | Sprial | Determinate | Schizocoelus | Mouth | |
| Brachiopoda | Coelomate | Sprial | Determinate | Schizocoelus | Mouth | |
| Molluska | Polyplacophora | Coelomate | Sprial | Determinate | Schizocoelus | Mouth |
| Molluska | Gastropoda | Coelomate | Sprial | Determinate | Schizocoelus | Mouth |
| Molluska | Bivalvia | Coelomate | Sprial | Determinate | Schizocoelus | Mouth |
| Molluska | Cephalopoda | Coelomate | Sprial | Determinate | Schizocoelus | Mouth |
| Annelida | Polychaeta | Coelomate | Sprial | Determinate | Schizocoelus | Mouth |
| Annelida | Oligochaeta | Coelomate | Sprial | Determinate | Schizocoelus | Mouth |
| Annelida | Hirudnea | Coelomate | Sprial | Determinate | Schizocoelus | Mouth |
| Arthropoda | Arachnida | Reduced | Sprial | Determinate | Schizocoelus | Mouth |
| Arthropoda | Merostomata | Reduced | Sprial | Determinate | Schizocoelus | Mouth |
| Arthropoda | Pycnogonida | Reduced | Sprial | Determinate | Schizocoelus | Mouth |
| Arthropoda | Malocostraca | Reduced | Sprial | Determinate | Schizocoelus | Mouth |
| Arthropoda | Diplopoda | Reduced | Sprial | Determinate | Schizocoelus | Mouth |
| Arthropoda | Chilopoda | Reduced | Sprial | Determinate | Schizocoelus | Mouth |
| Arthropoda | Insecta | Reduced | Sprial | Determinate | Schizocoelus | Mouth |
| Onychophora | Reduced | Sprial | Determinate | Schizocoelus | Mouth | |
| Echinodermata | Asteroidea | Coelomate | Radial | Indeterminate | Enterocoelus | Anus |
| Echinodermata | Ophiuroidea | Coelomate | Radial | Indeterminate | Enterocoelus | Anus |
| Echinodermata | Echinoidea | Coelomate | Radial | Indeterminate | Enterocoelus | Anus |
| Echinodermata | Holothuroidea | Coelomate | Radial | Indeterminate | Enterocoelus | Anus |
| Echinodermata | Crinoidea | Coelomate | Radial | Indeterminate | Enterocoelus | Anus |
| HemiChordata | Coelomate | Radial | Indeterminate | Enterocoelus | Anus | |
| Phylum | Class | Skeleton | Segmentation | Dig tract | Dig type | food gather |
| Porifera | Spicules | No | none, spongocoel | endocytosis | Choanocytes | |
| Cnidaria | Hydrozoa | Hydrostatic | No | gstrovsclr cav | Endocyt, extr | tent, cnid,Nem |
| Cnidaria | Scyphozoa | Hydrostatic | No | gstrovsclr cav | Endocyt, extr | tent, cnid,Nem |
| Cnidaria | Anthozoa | Hydrostatic | No | gstrovsclr cav | Endocyt, extr | tent, cnid,Nem |
| Ctenophora | Hydrostatic | No | Phary, GC | Extracellular | tent, colloblasts | |
| Platyhelminthes | Turbellaria | Hydrostatic | No | Phary, GC | Extracellular | Pharynx, mucus |
| Platyhelminthes | Monogenea | Hydrostatic | No | Phary, GC | Extracellular | suckers |
| Platyhelminthes | Trematoda | Hydrostatic | No | Phary, GC | Extracellular | suckers, enzymes |
| Platyhelminthes | Cestoda | Hydrostatic | No | none | absorb,diffus | hooks,suckers |
| Rotifera | Hydrostatic | No | Complete | Extracellular | cilia, trophi | |
| Nematoda | Hydrostatic | No | Complete | Extracellular | pharynx | |
| Nemertea | Hydrostatic | No | Complete | Extracellular | proboscis | |
| Byrozoa | porous exo | No | Complete, U | Extracellular | Lophphore | |
| Phoronida | hyrost, chiton tube | No | Complete, U | Extracellular | Lophphore | |
| Brachiopoda | exo, shell | No | Complete, U | Extracellular | Lophphore | |
| Molluska | Polyplacophora | exo, shell | No | Complete | Extracellular | radula |
| Molluska | Gastropoda | hydro, exo shll | No | Complete | Extracellular | radula |
| Molluska | Bivalvia | exo shell | No | Complete | Extracellular | gill filter |
| Molluska | Cephalopoda | hydro,exo shell,cart | No | Complete | Extracellular | tent, beak, radula |
| Annelida | Polychaeta | Hydrostatic | Yes | Complete | Extracellular | filter or jaw |
| Annelida | Oligochaeta | Hydrostatic | Yes | Complete | Extracellular | Pharynx |
| Annelida | Hirudnea | Hydrostatic | Yes | Complete | Extracellular | teeth, enzymes |
| Arthropoda | Arachnida | Exoskeleton | Yes | Complete | Extracellular | Chelicrae, Pedipalp |
| Arthropoda | Merostomata | Exoskeleton | Yes | Complete | Extracellular | Chelicerae |
| Arthropoda | Pycnogonida | Exoskeleton | Yes | Complete | Extracellular | Chelicerae |
| Arthropoda | Malocostraca | Exoskeleton | Yes | Complete | Extracellular | mandible, appendages |
| Arthropoda | Diplopoda | Exoskeleton | Yes | Complete | Extracellular | mandible |
| Arthropoda | Chilopoda | Exoskeleton | Yes | Complete | Extracellular | fang-like |
| Arthropoda | Insecta | Exoskeleton | Yes | Complete | Extracell, external | manible |
| Onychophora | Hydrostatic | Yes | Complete | Extracellular | oral papillae,mandible | |
| Echinodermata | Asteroidea | Endoskeleton | Yes | Complete | external | tubefeet,evert stomach |
| Echinodermata | Ophiuroidea | Endoskeleton | Yes | Complete | Extracellular | tubefeet |
| Echinodermata | Echinoidea | Endoskeleton | Yes | Complete | Extracellular | pedicellaria, Aristotle |
| Echinodermata | Holothuroidea | Endoskeleton | Yes | Complete | Extracellular | tentacles |
| Echinodermata | Crinoidea | Endoskeleton | Yes | Complete | Extracellular | mucus, arms |
| Hemichordata | Endo cartilage | Yes | Complete | Extracellular | mucus strands | |
| Phylum | Class | worm-like | internal transport | Asexual Rep | Locomotion | Cephalization |
| Porifera | no | cellular diffusion | budding, regenrtion | sessile | no | |
| Cnidaria | Hydrozoa | no | GC, cell diff | budding, regenrtion | cilia | no |
| Cnidaria | Scyphozoa | no | ring canal, cell diff | budding off strobila | cilia | no |
| Cnidaria | Anthozoa | no | GC, cell diff | *budding | sessile | no |
| Ctenophora | no | GC canals, cell | N/A | Ctenes | no | |
| Platyhelminthes | Turbellaria | yes | GC, branching intestine | fission | cilia, muscle | yes |
| Platyhelminthes | Monogenea | yes | GC, cell diff | N/A | cilia | yes |
| Platyhelminthes | Trematoda | yes | GC, cell diff | fission | cilia | yes |
| Platyhelminthes | Cestoda | yes | cellular diffusion | no | passive | yes |
| Rotifera | no | pseudocoelome | parthenogenesis | cilia | yes | |
| Nematoda | yes | pseudocoelome | N/A | muscle | yes | |
| Nemertea | yes | Closed vascular | N/A | muscle | yes | |
| Byrozoa | no | coelom | N/A | sessile | lost | |
| Phoronida | no | coelom | N/A | sessile | lost | |
| Brachiopoda | no | coelom | N/A | sessile | lost | |
| Molluska | Polyplacophora | no | mntl cvty, open vessels | no | foot | yes |
| Molluska | Gastropoda | no | mntl cvty, open vessels | no | foot | yes |
| Molluska | Bivalvia | no | mntl cvty, open vessels | no | foot, jet | lost |
| Molluska | Cephalopoda | no | closed vessels | no | tentacles, jet | yes |
| Annelida | Polychaeta | yes | closed vessels | no | Muscle, parapodia | yes |
| Annelida | Oligochaeta | yes | closed vessels | fission | Muscle, setae | yes |
| Annelida | Hirudnea | yes | closed vessels | no | muscle | yes |
| Arthropoda | Arachnida | no | Hemocoel | no | jointed appendages | yes |
| Arthropoda | Merostomata | no | Hemocoel | no | jointed appendages | yes |
| Arthropoda | Pycnogonida | no | Hemocoel | no | jointed appendages | yes |
| Arthropoda | Malocostraca | no | Hemocoel | no | jointed appendages | yes |
| Arthropoda | Diplopoda | yes | Hemocoel | no | jointed appendages | yes |
| Arthropoda | Chilopoda | yes | Hemocoel | no | jointed appendages | yes |
| Arthropoda | Insecta | no | Hemocoel | no | jointed appendages | yes |
| Onychophora | yes | Hemocoel | no | musclular legs | yes | |
| Echinodermata | Asteroidea | no | clom, wtr vsclr | some regeneration | tube feet | lost |
| Echinodermata | Ophiuroidea | no | clom, wtr vsclr | no | arm motion | lost |
| Echinodermata | Echinoidea | no | clom, wtr vsclr | no | soines, tube feet | lost |
| Echinodermata | Holothuroidea | no | clom, wtr vsclr | no | tube feet | lost |
| Echinodermata | Crinoidea | no | clom, wtr vsclr | no | sessile or cirri | lost |
| Hemichordata | yes | closed vessels | no | sessile, proboscis | yes | |
| Phylum | Class | parasite | Overt Sensory Struc | Colonies | Mar, ter, fre | |
| Porifera | no | yes | Marine | |||
| Cnidaria | Hydrozoa | no | yes | Marine | ||
| Cnidaria | Scyphozoa | no | no | Marine | ||
| Cnidaria | Anthozoa | no | yes | Marine | ||
| Ctenophora | no | no | Marine | |||
| Platyhelminthes | Turbellaria | no | eye spots | no | Marine, fresh, ter | |
| Platyhelminthes | Monogenea | ecto | no | Marine, fresh | ||
| Platyhelminthes | Trematoda | endo | no | Marine, fresh, ter | ||
| Platyhelminthes | Cestoda | endo | no | Marine, fresh, ter | ||
| Rotifera | no | no | Fresh, marine | |||
| Nematoda | free & endo | no | all habitats | |||
| Nemertea | no | no | Mostly Marine | |||
| Byrozoa | no | yes | Marine | |||
| Phoronida | no | no - but look like it | Marine | |||
| Brachiopoda | no | no | Marine | |||
| Molluska | Polyplacophora | no | no | Marine | ||
| Molluska | Gastropoda | no | Antennae | no | Marine, fresh, ter | |
| Molluska | Bivalvia | no | no | Marine, fresh | ||
| Molluska | Cephalopoda | no | eye | no | Marine | |
| Annelida | Polychaeta | no | antennae | no | Mostly Marine | |
| Annelida | Oligochaeta | no | no | Fresh, terrestrial | ||
| Annelida | Hirudnea | free & ecto | no | fresh, ter, mar | ||
| Arthropoda | Arachnida | free & ecto | eye | no | terrestrial | |
| Arthropoda | Merostomata | no | eye | no | Marine | |
| Arthropoda | Pycnogonida | no | eye | no | Marine | |
| Arthropoda | Malocostraca | no | eye, 2 antennae | no | Marine, fresh | |
| Arthropoda | Diplopoda | no | eye | no | terrestrial | |
| Arthropoda | Chilopoda | no | eye, antennae | no | terrestrial | |
| Arthropoda | Insecta | free & ecto | eye, antennae | some | terrestrial, fresh | |
| Onychophora | no | preantennae, eye | no | terrestrial | ||
| Echinodermata | Asteroidea | no | no | Marine | ||
| Echinodermata | Ophiuroidea | no | no | Marine | ||
| Echinodermata | Echinoidea | no | no | Marine | ||
| Echinodermata | Holothuroidea | no | no | Marine | ||
| Echinodermata | Crinoidea | no | no | Marine | ||
| Hemichordata | no | no | Marine | |||
| Phylum | Class | Unique | Unique | |||
| Porifera | no tissue | choanocytes | amoebocytes | Spicules | 3 body plans | |
| Cnidaria | Hydrozoa | polyp dominant | 2 polyp types | colonial | ||
| Cnidaria | Scyphozoa | medusa dominant | tetramerous | ring canal | ||
| Cnidaria | Anthozoa | polyp only | indiv or colonial | |||
| Ctenophora | Ctenes | Biradial symmetry | ||||
| Platyhelminthes | Turbellaria | Free living | regenerate fission | |||
| Platyhelminthes | Monogenea | ectoparasite | ||||
| Platyhelminthes | Trematoda | endoparasite | multiple tissues | multiple hosts | ||
| Platyhelminthes | Cestoda | endoparasite | no digestive tract | multiple hosts | proglottids | scolex |
| Rotifera | Crown of cilia | parthenogenetic | ||||
| Nematoda | longitudinal muscle | free and endoparasite | ||||
| Nemertea | proboscis | secondarily acoelomate | ||||
| Byrozoa | lophophorate | colonial | ||||
| Phoronida | lophophorate | tube worm | ||||
| Brachiopoda | lophophorate | bivalve morphology | ||||
| Molluska | Polyplacophora | 8 dorsal plates | ||||
| Molluska | Gastropoda | well dev head | good foot locomotion | torsion | ||
| Molluska | Bivalvia | valves | no head | no radula | adductor muscles | |
| Molluska | Cephalopoda | tentacles | beak | siphon | defense | |
| Annelida | Polychaeta | parapodia | antennae | |||
| Annelida | Oligochaeta | no parapodia | setae | digestion | ||
| Annelida | Hirudnea | no setae, parapod | free and parsitic | |||
| Arthropoda | Arachnida | 2 tagmata | Chelicerae,pedipalps | 4pr walking leg | webs | some parasites |
| Arthropoda | Merostomata | 2 tagmata | Pedipalps | Marine | ancient group | |
| Arthropoda | Pycnogonida | 2 tagmata | Pedipalps | Marine | marine spiders | |
| Arthropoda | Malocostraca | 2 antennae | biramous appendages | |||
| Arthropoda | Diplopoda | uniramous | Diplosegemnts | |||
| Arthropoda | Chilopoda | uniramous | 1pr leg/segment | antennae | ||
| Arthropoda | Insecta | uniramous | 3 tagmata | flight | most diverse | |
| Onychophora | preantennae | enigmatic phylogeny | no exoskeleton | hemocoel | ||
| Echinodermata | Asteroidea | endoskeleton | 2ndary radial, pent | water vascular | 5 ambulacra | |
| Echinodermata | Ophiuroidea | endoskeleton | 2ndary radial, pent | water vascular | 5 arms,distinct disk | |
| Echinodermata | Echinoidea | endoskeleton | 2ndary radial, pent | water vascular | Test | |
| Echinodermata | Holothuroidea | endoskeleton | 2ndary radial, pent | water vascular | no spines | tube shape |
| Echinodermata | Crinoidea | endoskeleton | 2ndary radial, pent | water vascular | cirri | |
| Hemichordata | Proboscis | Pharyngeal gill slits | dorsal nerve cord | no notocord |
