Arthropods 
Non-Insects

Characteristics

Movement & Growth


Butterfly Molting Pupal Case

Evolution & Taxonomy

Subphylum Trilobita
Characteristics


TRILOBITE

Subphylum Chelicerata
Characteristics


HORSESHOE CRAB


GARDEN SPIDER


MITE


TICK


SCORPION

Subphylum Crustacea
Characteristics

CRAB SHRIMP


PILLBUG


DAPHNIA


BARNACLE


CRAYFISH

               * Compound eyes on stalks
              
* Chitinous teeth in stomach grind food
              
* Wastes leave through anus
              
*  Green glands filter wastes from blood & help with salt balance
               * 
Open circulatory system with heart to pump blood to gills & body cells
               *
Ostia - one way valves allowing blood from dorsal sinus to reenter heart
               *
Gills attached to walking legs
               *
Separate sexes that mate in fall & sperm stored in seminal receptacle
               * 
Eggs attach to swimmerets of female & hatch in several weeks


COPEPOD

Subphylum Uniramia
Characteristics

Class Chilopoda


CENTIPEDE

Class Diplopoda


MILLIPEDE

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