Topic 3: Basic Insect Identification

Question 1

INSECT CHARACTERISTICS

Answer 1

1. body divided into 3 regions (head, thorax, abdomen)
2. 3 pairs of legs

Question 2

ARTHROPODS CHARACTERISTICS

Answer 2

1. body divided into 2 (cephalothorax, abdomen) or more than 3 divisions
2. 4 pairs of legs or more

Question 3

ENTOMOLOGY

Answer 3

1. study of insects

Question 4

INSECT TAXONOMY

Answer 4

1. identification of insects to designed taxa

Question 5

IMPORTANCE OF BASIC IDENTIFICATION PROCESS

Answer 5

1. habit (behavior)
2. habitat (dwelling areas)
3. control measures (prevention)

Question 6

INSECT CLASSIFICATION BASED ON METAMORPHOSIS AND DEVELOPMENT

Answer 6

1. ametabolous (no metamorphosis)
2. paurometabolous (gradual)
3. hemimetabolous (incomplete)
4. holometabolous (complete)

Question 7

AMETABOLOUS

Answer 7

1. primitively wingless insects (silverfish, springtails)
2. immature form resembles adults

Question 8

PAUROMETABOLOUS

Answer 8

1. 3 major stages (egg, nymph, adult)
2. immature form resembles adults
3. difference to adults (underdeveloped genetalia, wing pads)
4. hemiptera, orthoptera, phtiraptera

Question 9

HEMIMETABOLOUS

Answer 9

1. 3 major stages (egg, naiad, adult)
2. immature form does not resemble adults
3. immature and adult has different habitat
4. external wing pads, tracheal gills

Question 10

HOLOMETABOLOUS

Answer 10

1. 4 major stages (egg, larva, pupa, adult)
2. larvae may live in same habitat and consume same food as adult

Question 11

HYPERMETAMORPHOSIS

Answer 11

1. change in body form, feeding behavior, habitat for larva
2. parasitic hymenoptera, blister beetles

Question 12

INSECT CLASSIFICATION BASED ON MOUTHPARTS

Answer 12

1. chewing
2. piercing-sucking
3. cutting-sponging
4. sponging
5. rasping-sucking
6. siphoning
7. chewing-lapping

Question 13

MOUTHPART: CHEWING

Answer 13

1. orthoptera
2. coleoptera
3. blattodea

Question 14

MOUTHPART:: CUTTING-SPONGING

Answer 14

1. horsefly (tabanidae)

Question 15

MOUTHPART: SPONGING

Answer 15

1. housefly

Question 16

MOUTHPART: RASPING-SUCKING

Answer 16

1. thysanoptera

Question 17

MOUTHPART: SIPHONING

Answer 17

1. lepidoptera

Question 18

MOUTHPART: CHEWING-LAPPING

Answer 18

1. honeybee (apidae)

Question 19

INSECT CLASSIFICATION BASED ON WINGED FORMS

Answer 19

1. membranous
2. hemelytron
3. fringed wings
4. tegmen
5. elytron

Question 20

WINGED FORM: MEMBRANOUS

Answer 20

1. light membrane covering

Question 21

WINGED FORM: HEMELYTRON

Answer 21

1. half membranous and half leathery

Question 22

WINGED FORM: FRINGED WINGS

Answer 22

1. composed of hairy fringes

Question 23

WINGED FORM: TEGMEN

Answer 23

1. leathery wings
2. thicker than membranous wings

Question 24

WINGED FORM: ELYTRON

Answer 24

1. hard covering

Question 25

OTHER TYPES OF WING MODIFICATION

Answer 25

1. haltere
2. hamuli

Question 26

WING MODIFICATION: HALTERE

Answer 26

1. hindwing reduces to knob-like structure
2. used for flight balance

Question 27

WING MODIFICATION: HAMULI

Answer 27

1. hook-like structure found on margins of hindwing costa
2. used in locking forewing during flight