Download PHYLUMS OF INVERTEBRATE ANIMALS

PHYLUMS OF INVERTEBRATE
ANIMALS
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Key for chart
•  Reproduction
– S = Sexual
AS = Asexual
•  Symmetry
– B = Bilateral
R = Radial
•  First Opening
– D = Deuterostome
P = Protosome
•  Coelom
•  C= Coelom: P=Pseudocoelm; None
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1-Phylum Porifera
•  Members: Sponges
•  Can reproduce sexually or asexually
(budding)
•  no symmetry, no tissues or organs.
Other information:
•  unable to move (sessile) from where they
are attached
•  Mostly live in salt water
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2-Phylum Cnidaria
•  Members: Jellyfish, hydra, coral, sea anemones
•  Reproduce sexually (medusas) or asexually (polyp)
•  Radially symmetrical; 2 layers of tissues; no coelom
Other information:
•  Have nematocysts – “stinging darts”
•  Can move
•  2 body forms-medusas (Bell shaped) and polyp
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3-Phylum Platyhelminthes
•  Members: Flatworms-Turbellarians, Flukes, and
Tapeworms
•  Reproduce sexually or asexually
•  Bilaterally symmetrical, 3 layers of tissues, no
coelom
Other information:
•  Parasites
•  Shape due to no circulatory system
•  Most are hermaphrodites with male
and female parts
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4-Phylum Nematoda
•  Members: Roundworms
•  Reproduce sexually
•  3 layers of tissue; Bilaterally symmetrical;
pseudocoelom
Other information:
•  Covered in a tough cuticle
•  Have a complete digestive system
•  Most are free-living, with few parasitic species
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5-Phylum Mollusca
!  Members: Octopus, squid, clams,
scallops, snails, slugs, oysters
!  Reproduce: Sexually or asexually
!  3 layers of tissue; bilaterly symmetrical;
coelom
Other information:
!  Most have a hard shell with a soft body
!  Have well developed organ systems
!  Have a brain
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6-Phylum Annelida
!  Members: earth worms, marine
worms, leeches
! Reproduce either sexually or asexually
(fragmentation)
! 3 layers of tissue; bilaterly
symmetrical; coelom
Other information:
! Consist of segmented bodies
! Many have setae (small hair like
bristles) to help them move through
soil
! Have a complete gut, rudimentary
brain (with nerve cord), and
circulatory system
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7-Phylum Arthropoda
!  Members: Insects, crabs, lobsters, crayfish,
arachnids, centipedes, millipedes
!  Reproduce - Sexually
!  3 layers of tissue; bilaterly symmetrical;
coelom
Other information:
•  Hardened exoskeletons -Jointed appendages
!  Respiratory Structures -Sensory Structures
!  Division of labor
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Class Arachnida
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Class Insecta
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Class Crustacea
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8-Phylum Echinodermata
!  Members: Sea urchins, star fish, sea
biscuits, sand dollar, sea lilies
!  Reproduce sexually
!  3 layers of tissue; radialy symmetrical;
coelom
Other information:
!  Well developed skeleton made of
calcium carbonate plates
!  No brain, but nervous system is present
!  Water vascular system to deliver water
to tube feet for movement
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