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Phylum Porifera (sponges)

Phylum Porifera (sponges)

No symmetry, no cephalization, gut type, body cavity, segmentation, cellular level tissues, minimal development, choanocytes (move water through body wall and cilia filter food as well), regeneration, flagellated larvae (sexual), asexual fragmentation, hermaphroditic

Phylum Cnidaria (anemone, jellyfish, hydra, coral)

2 body forms (polyp and medusa), 2 tissues (epidermis, mesoglea, endogastrodermis), radial symmetry, tentacled, mostly marine, carnivores, nematocytes (in tentacles), specialised cells (nerve contractile, sensory no cephalization), hydrostatic skeleton (some), sexual/asexual, gut sac, acoelomate

Phylum Platyhelminthes (marine flat worms)

simplest animal with organs/organ systems, cephalization, bilateral, acoelomate, true muscle tissues (triploblastic), protosome, hermaphroditic/ asexual, flame cells (rudimentary kidneys) excrete mucus use cilia to move through it

Parasites, with hooks/ tough epidermis, some have no digestive system (sac like gut), primary and intermediate hosts

Phylum rotifera (plankton)

bilateral, cephalization, complete gut tubular, pseudocoelomate, cilia for propulsion, sexual/ some parthogenetic females, triploblastic, protosome, corona (ciliated structure)

Phylum Annelida (little rings) (segmented worm/earthworms/ leach)

bilateral, cephalization *brain/ nerve cords, tubular (specialized region of digestive system, closed circulatory system, segmented, hermaphroditic, aquatic/terrestrial, setae( little bristles), parapodia (extension of body segment), coelomate (classes polychaeta, oligochaete, Hirudinea)

Phylum Mollusca (soft) snail, clam

head, foot visceral mass (coelomate), tubular, protostome, bilateral, cephalization, open circulatory system, ciliated larvae- trochophore, fastest, smartest, aquatic/terrestrial, herbivorous and predatory, mantle (layer in the shell), radula ( the scraping tongue

Class gastropods (snail, slug)

bilateral, cephalization (head with eyes at end of tentacles), tubular, coelomate, segmentation, triploblastic, protosome, sexual, torsion (twisted mantle), most with shell, largest class, most grazers, some predatory

Class bivalvia (mussels, scallop, oyster)

bilateral, reduced cephalization, tubular, coelomate, protosome, sexual, filter feeders, flattened shell with two halves (valve), marine and freshwater

Class Cephalopoda

bilateral, cephalization (nervous system), tubular, coelomate, carnivore, fast (siphon), jaws (beak)= poison, reduced shell, sexual, not segmented exoskeleton

Phylum Nematoda (roundworm)

unsegmented, bilateral, cephalization, pseudocoelomate, sexual repro with internal fertilization, simplest complete digestive system (tubular), parasitic/ pathogenic

Phylum Anthropoda (insects, crustaceans, spiders)

bilateral, cephalization (well developed sense organs), tubular, open circulatory and efficient respiration, molting (ecdysis), exoskeleton (protection and prevent dehydration), jointed appendage, numerous and diverse metamorphisis

Class Polyplacophora (chitons, snail)

bilateral, reduced cephalization, tubular, coelomate, grazers, marine, protosome, sexual, eight plated shell