marine invertebrates

Meet the Lower InvertebratesKingdom-Animalia

Major Invertebrate Phyla

1) Phylum Porifera

2) Phylum Ctenophora

3) Phylum Cnidaria

4) Phylum Platyhelminthes

5) Phylum Annelida

6) Phylum Mollusca

7) Phylum Echinodermata

8) Phylum Arthropoda

Symmetry

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1) Phylum Porifera

-Example: Sponges

-Named for many pores

-No symmetry (asymmetrical)

-Most primitive (simple) animals – no organs

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2) Phylum Ctenophora

-Example: Comb jellies

-Radial symmetry

-Harmless bioluminescent jellies

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=9RJaK6Q9o2SpYM&tbnid=E5rURiJuAbvlCM:&ved=0CAUQjRw&url=http%3A%2F%2Fcomenius.susqu.edu%2Fbiol%2F202%2Fanimals%2Fradiata%2Fctenophora%2Fctenophora.html&ei=q2YmUYHrEIu-0QHy5oH4DQ&bvm=bv.42661473,d.dmQ&psig=AFQjCNEw5YiUAAOPSfrPPJTqRkRAZHWC4Q&ust=1361557541639390

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3) Phylum Cnidaria-Jellyfish (AKA Sea Jellies), sea anemones, and corals

-Members of this group have stinging cells

-Radially symmetrical

-2 tissue layers

-No organs

4) Phylum Platyhelminthes-The Flatworms

-Bilateral symmetry

-Simple

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5) Phylum Annelida

-The Segmented Worms

-Examples-Polychaetes

(and Earthworms on land)

-Bilateral Symmetry

-Advanced worms

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6) Phylum Mollusca

-Examples: Clams, snails, octopus, squid

-Soft bodied animals with a large “foot”

-Bilateral symmetry

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=Oz25hmLWiONpjM&tbnid=7AkdTOWgVHtBnM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.cartage.org.lb%2Fen%2Fthemes%2Fsciences%2Fzoology%2Fanimalmorphology%2Flistanimalphyla%2Flistanimalphyla.htm&ei=h2cmUY66FuT00QGt64DgAg&bvm=bv.42661473,d.dmQ&psig=AFQjCNG3obM6qFRRA_RlHvjNRJOgpmXcsQ&ust=1361557759158034

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7) Phylum Arthropoda

-Examples: Crabs, lobsters, barnacles, insects, arachnids

-Exoskeleton

-Jointed or hinged appendages

-Bilateral symmetry


-Examples: Sea stars, sea urchins, sand dollars, sea cucumbers

-Bumpy skinned animals

-Pentamerous radial symmetry

marine invertebrates

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