Review of Animal Phylogeny

Sponges

Anatomy of a Sponge

Polyp and Medusa Forms of Cnidarians

Jelly Medusa

A Cnidocyte of a Hydra

Cnidarians: Hydrozoans (top left), jelly (top right), sea anemone (bottom left), coral polyps (bottom right)

Purple striped jelly, Pelagia panopyra

Coral Polyps

The Life Cycle of the Hydrozoan Obelia

Ctenophore

Classes of Phylum Platyhelminthes

A Flatworm

Anatomy of a Planarian

The Life History of a Blood Fluke, Schistosoma mansoni

Anatomy of a Tapeworm

Basic Body Plan of Mollusks

Major Classes of Phylum Mollusca

Chiton

The Results of Torsion in a Gastropod

Garden Snail

Gastropods: Nudibranchs (top left and top right), terrestrial snail (bottom left), deer cowrie (bottom right)

A Bivalve: Scallop

Anatomy of a Clam

Cephalopods: Squid (top left and bottom left), nautilus (top right), octopus (bottom right)

Anatomy of an Earthworm

External Anatomy of an Earthworm Clitellum

Annelids, the segmented worms: Polychaete (left), feather-duster worm (middle), leech (right)

Christmas-Tree Worms

Nematode, C. elegans

Parasite nematode, Trichinella spiralis

External Anatomy of an Arthropod

A Trilobite Fossil

Horseshoe Crabs, Limulus polyphemus

Arachnids: Scorpion (left), honeybee air tube filled with parasitic mites (right)

Spider Anatomy

Lycosid Spider: Female With Offspring

Class Diplopoda (millipedes)

Insect flight, Dragonfly

Anatomy of a Grasshopper, an Insect

Insecta: Beetle

Metamorphosis of a Butterfly Larva Pupa Emerging Adult Adult

Crustaceans: Lobster (top left), banded coral shrimp (bottom left), barnacles

Ochre sea stars, Pisaster ochraceus

Anatomy of a Sea Star

Echinoderms: Sea star (top left), brittle star (top right), sea urchin (bottom left), sea lily (bottom right),

1)Name the four characteristics of most mollusks. 2) Name the three classes of mollusks and a representa- tive organism in each.

1)Snails and slugs need a moist skin for.. 2) How does circulation differ in the cephalopods compared to the other mollusks? 3) How can nudibranches protect themselves?

1) Which of the following is least related to the others? a.limpet b. nudibranch c. abalone d. scallop 2) Other than jewelry (oysters) and food, for what purpose can mollusks be used?

1)Name three characteristics of all arthropods. 2) Name two structures used for respiration.

What controls when an arthropod molts? In crayfish and other decapods the claws are called ________. Horseshoe crabs are not true crabs; their internal anatomy is more similar to that of..

The chiton moves using its ______. Name two gastropods. What are four common characteristics of most mollusks?