Insects Flashcards
Arthropoda
jointed appendages
insects came from
annelid worm ancestor
Chelicerates
Mandibles: spiders, mites, ticks
Crustaceans
crabs, lobsters, crayfish
Mandibulates
prominent chewing mandibles
Onychophora
millipedes, centipedes
Millipedes
2 pairs of legs per segment
Centipede
1 pair of legs per segment
Chilopoda
Centipedes
Diplopoda
millipedes
crustacea
lobster, crab, shrimp
cephalothorax
head and abdomen fused (crab)
-5 pairs of legs at most
Arachnida
spider
cephalothorax
Chelicerae: poison glands
insecta
head, thorax, abdomen
appendages
jointed and specialized
exoskeleton
chitin
increases mechanical advantage
Ordovicion Period
When insects evolved
First to fly
400 million years ago
Insect evolution
related to plant evolution
Neonicotinoid
nicotine-like insecticide
CCD- colony collapse disorder
-black guts
mobility
efficient muscle leverage
small body size
with physiological functions that maximize utilization of energy
Reproductive fecundity & short life cycle
permits rapid adaptive changes
complex metamorphosis under hormonal
control permits two distinct life styles
-no competition among ages
Protective coloration mimicry and defensive chemicals
increase survival rates
cryptic coloration
hard to see; camo