Arthropods - T3 S1.5 Flashcards
Arthropods are primarily ___.
insects
animals with jointed legs and an exoskeleton
arthropods
4 main sub-phyla of arthropods
crustaceans,
myripoda,
arachnids,
insects
examples of crustaceans
lobsters, shrimp, crabs
examples of myripoda
centipedes, millipedes
examples of arachnids
scorpions, spiders, ticks
patriarch of the arthropods, a living fossil; obscurely segmented, 1 pair of legs each segment, antennae
onychophora
generally classified on basis of metamorphosis and mouthpart morphology
insect
egg, nymph, adult;
considered less advanced;
immatures and adults generally in same habitat
incomplete metamorphosis
examples of insects with incomplete metamorphosis
mayflies, dragonflies, grasshoppers/crickets, lice, roaches, aphids/cicadas, true bugs, etc.
egg, larva, pupa, adult;
considered more advanced;
immatures and adults often in different habitats
complete metamorphosis
examples of insects with complete metamorphosis
beetles, true flies, butterflies, fleas, bees/wasps, etc.
examples of mouthpart morphology
chewing vs. piercing/sucking
2 men who discovered arthropods as disease vectors
Theobald Smith,
F.L. Kilbourne (protozoan)
2 types of vectors
mechanical vector,
biological vector
vector type:
vector carries the pathogen (usually) externally
mechanical vector
vector type:
many different critters can transmit the same pathogen
mechanical vector
example of a mechanical vector
cholera (flies, cockroaches, etc.)
example of a biological vector
plague (oriental rat flea),
malaria (mosquitoes)
vector type:
vector carries the pathogen internally
biological vector
vector type:
pathogen is only carried by one or a few species of critter
biological vector
number of orthoptera species
26,000
(T/F) Orthoptera are economic pests and mechanical vectors.
true
true bugs
hemiptera
number of hemiptera species
50,000
(T/F) Hemiptera are economically important vectors and animal pests.
false (plant pests)
beetles (many pests)
coleoptera