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
metamorphosis of coleoptera
complete
mouthparts of coleoptera
chewing
meaning of coleoptera
sheath wing
number of coleoptera species
400,000
examples of coleoptera pests
boll weevil, japanese beetle, potato beetle, flour beetle, granary weevil, etc.
grasshoppers and cockroaches
orthoptera
metamorphosis of orthoptera
incomplete
mouthparts of orthoptera
chewing
meaning of orthoptera
skin wing
metamorphosis of hemiptera
incomplete
mouthparts of hemiptera
piercing/sucking
meaning of hemiptera
partial wing
social insects: bees, wasps, ants
hymenoptera
metamorphosis of hymenoptera
complete
mouthparts of hymenoptera
chewing
meaning of hymenoptera
membrane wing
number of hymenoptera species
130,000
How are hymenoptera economically important?
as parasites and pollinators
butterflies and moths
lepidoptera
metamorphosis of lepidoptera
complete
meaning of lepidoptera
scale wing
mouthparts of lepidoptera
piercing/sucking (adults),
chewing (larvae)
number of lepidoptera species
170,000
(T/F) Lepidoptera are minor economic pests.
false (major)
examples of lepidoptera pests
cotton bollworm, corn earworm, tomato fruitworm, bagworm, etc.
true flies
diptera
metamorphosis of diptera
complete
mouthparts of diptera
piercing/sucking
meaning of diptera
two wing
number of described diptera species
about 240,000
(T/F) Diptera are important disease vectors.
true
examples of diptera vectors
mosquitos, tsetse fly
example of a disease from diptera, maggots in live flesh
myiasis
a plant or animal detrimental to humans or human concern
pest
type of insect pest control:
modify the environment of some life-stage
cultural
example of cultural pest control
drain the swamp
type of insect pest control:
introduce a predator or pathogen
biological
example of biological pest control
introduce parasitic wasps
type of insect pest control:
introduce a toxin
chemical
example of chemical pest control
spray the crops
How do you control a vector-borne disease?
break the disease cycle
How do you break a vector-borne disease cycle?
kill/eliminate vector,
chemoprophylaxis (drugs to prevent disease)