ZOOL 110 Lab 11 Quiz

Subphyla of Arthropoda

Trilobita, Chelicerata, Crustacea, Myriapoda, Hexapoda

Subphylum Trilobita

extinct, marine, segmentation, biramous appendages, compound eyes

Chelicerata

horseshoe crab, scorpions, spiders, ticks, mites; two body regions, chelicerae, pedipalps, walking legs, NO mandibles

Crustacea

crabs, lobsters, barnacles, etc. cephalothorax/abdomen, biramous appendages, antennae, gills

Crustacean appendages

illustrate serial homology; all crustaceans have the same appendage "plan", expodite, endopodite, protopodite

Myriapoda

centipedes and millipedes

Class Chilopoda

centipedes; uniformly segmented w/ 1 pair of legs per, poison claws, carnivorous

Class Diplopoda

Millipedes; uniformly segmented w/ 2 pairs of legs per, herbivorous, cylindrical

Hexapoda

six unbranched (uniramous) appendages; terrestrial; jaws

Classes of Myriapoda

Chilopoda and Diplopoda

Class Insecta

over 1M species, terrestrial invertebrates, some fly - only inverts to do this! 3 body regions; 3 pairs walking legs; wings; compound eyes; tracheae; antennae

Uropod

Crayfish appendage for swimming backwards

swimmerets

abdominal appendages for swimming

walking legs

cephalothorax appendages for walking

Cheliped

crayfish claw appendage

maxilliped

sensory/food handling appendage

Crayfish

Phylum Arthropoda Subphylum Crustacea

Horseshoe Crab

Phylum Arthropoda Subphylum Chelicerata

Horseshoe crab feeding appendages

chelicerae

Garden spider

Phylum Arthropoda

Subphylum Chelicerata

Spider chelicerae

fangs to hold food

Spider pedipalps

sensory appendages for handling food

scorpion

Phylum Arthropoda Subphylum Chelicerata

scorpion chelicerae

fangs to hold food

scorpion pedipalps

claws/pincers

centipede

Phylum Arthropoda

Subphylum Myriapoda

Class Chilopoda

tagmata of Chilopoda

2 - head/trunk

poison fang chilopoda

maxilliped appendage

millipede

Phylum Arthropoda

Subphylum Myriapoda

Class Diplopoda

tagmata of diplopoda

2 - head/trunk

Grasshopper

Phylum Arthropoda Subphylum Hexapoda Class Insecta