1. Subphyla Crustacea & Uniramia

2. only group of arthropods that is primarily aquatic
Subphylum Crustacea
only group of arthropods that is primarily aquatic
examples: crayfish,lobster,shrimp, barnacles, isopods (pill bugs), crabs (not horseshoe)
Balanus Barnacles
Crayfish

3. Body Structure: 2 pairs of antennae
carapace: Cuticle of head extends posteriorly and around sides (Cephalothorax) (exoskeleton = CaCO3 calcium carbonate)
Mantis Shrimp

4. Swimmerets: small abdominal legs Cheliped: 1st pair of walking legs;
Appendages:
Swimmerets: small abdominal legs
Cheliped: 1st pair of walking legs;
has pinching claw
3.Uropod: last pair; acts as rudder, jet backwards very fast!
Respiration: Gills
Excretion: Green glands
Deep Water Shrimp
Yellow Crab

5. Long body with many segments (flattened) First segment has claws
2. Subphylum Uniramia
Class: Chilopoda
Centipedes-
Long body with many segments (flattened)
First segment has claws
Claws inject poison into prey (predators!)
*One pair of legs per segment!
Carnivorous
Scolopendra Centipede

6. * Exude noxious chemicals (defense)
Class Diplopoda
Millipedes-
* Exude noxious chemicals
(defense)
Long body with many segments (cylindrical)
No poison claws: Herbivoresl/ detrivores
TWO pairs of legs per segment
Herbivores, detrivores
* Eat dead plant material
Yellow spotted Millipede

7. Bibliography
Crayfish image- Date visited- November 19,2007
Balanus Barnacles- Date visited- November 19,2007
Mantis Shrimp- Date visited- Novemeber 19, 2007
Yellow Crab & Deep Water Shrimp- Date visited- November 20, 2007
Centipede- Date visited- November 20, 2007
Millipede- Date visited- November 20, 2007