entomology 462 insect morphology david j. shetlar, ph.d. the “bugdoc” the ohio state university,...

Entomology 462Insect 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)

Head Thorax Abdomen

Antenna Compound eye Wing

Lubber Grasshopper

Lubber Grasshopper

antenna

compound eye

frons

clypeus

ocelli

labrum

mandible

maxilla

labium

Lubber Grasshopper Head

pronotum

coxa

trochanter

femur

tibia

tarsus

spiraclemesopleuron

metapleuron

Lubber Grasshopper Thorax

abdominal tergites

abdominal sternites

cercus

spiracles

Lubber Grasshopper Abdomen

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.

Insect Respiratory System

Insect Nervous System

Insect Nervous System

Insect Muscular System

Insect Exoskeleton

Insect Reproductive System