week 7 - insect mouthparts

Question 1

mouth parts
labrum

Answer 1

top lip

articulates with the lower margin of the insect’s “face” (the
clypeus), concealing some or most of the mandibles.

Question 2

mouth parts
mandibles

Answer 2

chewing mouth parts
robust structures (sides)

positioned between the labrum and maxillae. Largest mouthparts of chewing insects - used to masticate (cut, tear, crush, chew) food.

Question 3

mouth parts
maxilla

Answer 3

manipulating the food while its being consumed
(has other features attatched)

(paired) situated beneath the mandibles, manipulate food during mastication, have hairs and “teeth” along their inner margins.

Question 4

mouth parts
labium

Answer 4

bottom lip
also helps with manipulating the food

single structure, although formed from two fused secondary maxillae. Described as ‘floor’ of the mouth.

Question 5

mouth parts
two broad categories

Answer 5

mandibulate (chewing)

haustellate (piercing-sucking, sponging, and siphoning)

Question 6

cockroach mouthparts

Answer 6

biting and chewing
labrun
mandible
maxilla
labium

Question 7

mosquito mouthparts

Answer 7

piercing and sucking
labium (seath that encloses all other features - moves out of way,, bends back))
mandible
maxilla
labrum (curved tube)

also has a salivary duct in hyprpharynx

Question 8

aphid mouthparts

Answer 8

sucking
labium/rostrum (seath that encloses all other features - moves out of way,, bends back))
mandible
maxilla
labrum (curved tube)

Question 9

housefly mouthparts

Answer 9

spit and sponge (spit out enzymes to dissolve food then sponge it up)
antenna (with lateral bristle)
labium
maxillary palps
labellum
psuedotracheae (do the sponging)

Question 10

butterfly mouthparts

Answer 10

suctorial mouthparts
labrum
labial palp
maxillary palp
coiled proboscis

Question 11

insect mouthparts
variation within orders?

Answer 11

yes

e.g. hymenoptera
biting - sawfly
biting and licking - wasp
licking and sucking - bea

Question 12

insect mouthparts
variation within a life-cycle?

Answer 12

yes
e.g. leidoptera

caterpillars - mandibulate (chewing)

go through metamorphasis

adult butterfly/moth - haustellate (siphoning)

Question 13

insect mouthparts
proboscis

Answer 13

siphoning mouthpart, e.g. in Lepidoptera.

Question 14

insect mouthparts
stylet

Answer 14

elongated piercing mouthpart, e.g. in Aphids.

Question 15

insect mouthparts
labellum

Answer 15

sponge-like feeding organ with pseudotrachae, e.g. house fly.