Subphyla Crustacea &
Uniramia
1. Subphylum Crustacea
• only group of arthropods that is primarily aquatic
• examples: crayfish,lobster,shrimp, barnacles,
isopods (pill bugs), crabs (not horseshoe)
Balanus Barnacles
Crayfish
Body Structure:
•2 pairs of antennae
•carapace: Cuticle of head
extends posteriorly and
around sides
(Cephalothorax)
(exoskeleton = CaCO3
calcium carbonate)
Mantis Shrimp
•Appendages:
1.Swimmerets: small abdominal legs
2.Cheliped: 1st pair of walking legs;
Deep Water Shrimp
has pinching claw
3.Uropod: last pair; acts as rudder, jet backwards
very fast!
• Respiration: Gills
• Excretion: Green glands
Yellow Crab
2. Subphylum Uniramia
Class: Chilopoda
Centipedes-
Scolopendra Centipede
• Long body with many segments (flattened)
• First segment has claws
• Claws inject poison into prey (predators!)
• *One pair of legs per segment!
• Carnivorous
Class Diplopoda
Millipedes• * Exude noxious chemicals
(defense)
• Long body with many segments
(cylindrical)
Yellow spotted Millipede
• No poison claws: Herbivoresl/ detrivores
• TWO pairs of legs per segment
•Herbivores, detrivores
• * Eat dead plant material
Bibliography
1.
Crayfish image- http://www.seahorseworld.co.nz/layout/crayfish.php
Date visited- November 19,2007
2.
Balanus Barnacles- http://www.biosbcc.net/ocean/flhi.htm Date
visited- November 19,2007
3.
Mantis Shrimp- http://www.galaxy15.com/mantis-shrimp.html Date
visited- Novemeber 19, 2007
4.
Yellow Crab & Deep Water Shrimphttp://www.curator.org/LegacyVMNH/WebOfLife/Kingdom/P_Arthro
poda/ClassCrustaceans/crustaceans.htm Date visited- November 20,
2007
5.
Centipede- http://www.britannica.com/eb/art-4741/Centipede Date
visited- November 20, 2007
6.
Millipede- http://greennature.com/gallery/pictures-ofinsects/yellow_spotted_millipede.html Date visited- November 20, 2007