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