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Entomology 462 Insect Morphology. David J. Shetlar, Ph.D. The “BugDoc”. The Ohio State University, OARDC & OSU Extension Columbus, OH. © October, 2004, D.J. Shetlar, all rights reserved. External Morphology (grasshopper). Antenna. Compound eye. Wing. Abdomen. Head. Thorax.

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Entomology 462

Insect Morphology

David J. Shetlar, Ph.D.

The “BugDoc”

The Ohio State University,

OARDC & OSU Extension

Columbus, OH

© October, 2004, D.J. Shetlar, all rights reserved


External Morphology (grasshopper)

Antenna

Compound eye

Wing

Abdomen

Head

Thorax




Lubber Grasshopper Head

antenna

compound eye

ocelli

frons

mandible

clypeus

maxilla

labium

labrum


Lubber Grasshopper Thorax

pronotum

mesopleuron

spiracle

metapleuron

coxa

femur

tibia

trochanter

tarsus


Lubber Grasshopper Abdomen

abdominal tergites

cercus

spiracles

abdominal sternites


Insect Digestive System

Generalized Diagram (typical of grasshopper)


Insect Digestive System

Caterpillar Digestive System

Milkweed Bug Digestive System


Insect Excretory System:

Malpighian Tubules


Insect Respiratory System

Spiracles, Tracheae, Tracheal Trunks & Air Sacs, Tracheoles


Insect Respiratory System

Cana lily skipper (a butterfly) larvae have an almost completely transparent exoskeleton, thereby allowing a good view of the tracheal system.








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