Phylum? Class?

Common Name?

Echinodermata Asteroidea

Sea Star

Phylum? Identify Structures Echinodermata Tube Feet

This is a diagram of the? Water Vascular System

Phylum? Echinodermata

Pedicellariae

Identify Structures

Phylum? Class?

Common Name?

Echinodermata Ophiuroidea

Brittle Star

Phylum? Class

Common Name?

Echinodermata Echinoidea

Sand Dollars

Phylum? Class?

What is my feeding apparatus called?

Echinodermata Echinoidea

Aristotle’s Lantern

Phylum? Common Name? Echinodermata Sea Cucumber

Class? Holothuroidea

Phylum? Common Name?

Living fossil Short stalk

Echinodermata Feather Star

Class Ateroidea - The Sea Star

Knobby Sea Star Pisaster giganteus Note blue around spines

Ochre Sea Star Pisaster ochraceus

Class Ophiuroidea - Banded Brittle Star

• Common under rocks in the middle intertidal • Feed on detritus on bottom

Class Echinoidea Sea Urchins

Sea urchins graze on kelp using an apparatus called “Aristotle’s Lantern”. It is equipped with intricate and efficient jaws.

Aristotle’s Lantern of a Sea Urchin

Class Echinoidea

Sand Dollar Skeleton

Class Holothuroidea Sea Cucumber

Class Crinoidea Feather Stars

Living fossil Short stalk

Sea Star: External Anatomy

1

1. Central disc

2

2. Madreporite or seive plate

3

3. Arm

4

4. Mouth 5. Ambulacral gooves 6. Tube feet

7. Sensory tentacles

5 6

7

Pedicellaria and Tube Feet

Phylum Echinodermata Class Asteroidea Cross Section of Sea Star Arm

Pyloric Caeca

Coelomic Cavity

Dermal Ossicle

Tube Foot

Sea Star Pedicellariae

1. Madreporite 2. Pyloric stomach

3. Cardiac stomach 4. Pyloric ceca 5. Gonad

1

2 3

4

5

Sea Star Arm Cross Section

Coelomic Cavity

1. Pyloric ceca 2. Ampullae 3. Radial canal 4. Lateral canal

5. Tube foot 6. Gonad

1

2

3 4

5

6

Pyloric ceca Dermal ossicle

Water Vascular System of Echinoderms

1. Stone canal

2. Ring canal 3. Lateral canal 4. Radial canal 5. Ampulla 6. Tube foot

1 2

3

4 5 6

_________ Larva Bipinnaria

Phylum Echinodermata Bipinnaria Larva