PHYLUM CHARACTERISTICS AND EXAMPLES

PORIFERA

• No mouths
• Tiny pores in outer wall
• Totipotent
• No basement membrane

EXAMPLES

• Hexactinellida
• Demospongia
• Calcanea

CNIDARIA

• Three layers
• Outer epidermis
• Middle- mesoglea
• Inner- gastrodermis

EXAMPLES

• Sea anemone
• Corals
• Hydras
• Sea jellies
• Sea pansies

PLATYHELMINTHES

• Free living parasitic on- segmented
• Complex reproductive system
• Protone phridia as excretory and osmoregulatory

EXAMPLES

• Bladder worm
• Tape worm

NEMATODA

• Bilateral symmetrical
• No circulatory and respiratory system

EXAMPLES

• Round worm
• Tube worm
• Parasitic worms

MOLLUSCA

• Complex nervous system
• Bilateral symmetry
• Beneficial for food

EXAMPLES

• Clam
• Land snails
• Garden slug

ANNELIDA

• Segmentation
• Bilateral symmertry
• Circulatory system

EXAMPLES

• Sandworms
• Leech
• Amphritrite

ARTHROPODA

• Jointed legs
• Exoskeleton made of chitin
• Open circulatory system

EXAMPLES

• Southern millipede
• Horseshoe crab
• Crayfish
• Scorpian
• Spider

ECHINODERMATA

• Spiny skin
• System regeneration
• Radical symmetry

EXAMPLES

• Sand dollar
• Starfish

CHORDOTA

• Single nerve cord
• Notochord- flexible rod on dorrel side of gut

EXAMPLES

• Perch
• Sea vase turicate
• Frog