10 Insect Mouth Parts

Dr. PARVISH PANDYA’s presentation

“Mouth-parts ofInsects”

A presentation compiled from various sources by

Dr. PARVISH PANDYA,Zoology Dept. Bhavan’s College, Andheri.

Sites from which presentations have been downloaded and later editted. I am indeed thankful to them for their kindness and support :http://esg-www.mit.edu:8001/esgbio/cb/org/organelles.htmlhttp://faculty.pnc.edu/jcamp/parasit/parasit.htmlhttp://www.amnh.org/rose/hope/creatinghope/http://www.biology.eku.edu/SCHUSTER/bio%20141/POWERPOINT%20NOTES/Intro%20to%20Protozoa_files/fullscreen.htmhttp://www.biosci.ohio-state.edu/~zoology/eeob405/http://www.tulane.edu/~wiser/protozoology/pwpt/http://www.iep.water.ca.gov/suisun/photos/wildlife.htmlhttp://www.uta.edu/biology/marshall/2343/http://www.uta.edu/biology/faculty/faculty.htmlhttp://www.okc.cc.ok.us/biologylabs/Documents/Zoology/PowerPoint.htmhttp://bio.fsu.edu/http://www.aw-bc.com/http://www.nhm.org/http://www.geo.cornell.edu/eas/education/course/descr/EAS302/presentations/

It is very easy to find mistakes in these presentations…..I request you to kindly rectify them and supply me the modifications needed at parvishpandya@yahoo.comThanks a lot and have fun in teaching & learning Zoology….

Insect Mouthparts

animal

Insects utilize nearly every organic substance

solid liquid

Important external features:1) Antennae -- contain chemical, olfactory, tactile, and auditory receptors. Can also sense vibrations.2) Compound eyes (vision/movement/color) and dorsal ocelli (light detection). Many insects perceive ultraviolet, blue-green and red wavelengths.3) Specialized mouth parts – food gathering, defense.

Basic Structures of Insect Mouthparts

• One labrum – upper lip

• Two mandibles - jaws

• Two maxillae – saw-like

• One labium – lower lip

1. Chewing Mouthparts

• The “classic” design• Cockroaches, grasshoppers, beetles, etc.• Chewing lice, order Mallophaga• Many immatures, including nymphs and

larvae

BEETLES

2 general types:1) mandibulate: specialized for biting off and chewing food

(most nymphs)2) haustellate: specially adapted for piercing and sucking

(e.g. mosquitoes and dipterans).

Food sa

2. Rasping - sucking

• Thrips

• Left mandible, • two maxillary stylets

Gladiolus thrips

Lily bulb thrips

Banded thrips

Heterothrips salicis

Large-legged thrips

Greenhouse thrips

Pear thrips

3. Piercing-Sucking Mouthparts

• Hemiptera and Homoptera (true bugs)

• Sheath-like labium, four piercing stylets (2 mandibles, 2 maxillae)

• piercing-sucking mouthparts• extraoral digestion• salivary glands• plant necrosis, animal stunning and poisoning• stylets – piercing and grooved

BUG BEAKS

Both Hemipteransfeed on blood

Triatomine bug,Rhodnius

Bedbug, Cimex

4. Diptera: Mosquito subtype• Six stylets enter host

skin (two mandibles, two maxillae, labrum, and hypopharynx

• Labium acts as protective sheath and folds back as styletsenter skin

4.Diptera: Sponging muscoid fly subtype

• House fly, face fly

• Labellum with labrum-epipharynxand hypopharynxform food canal

Order Diptera

doohickies

(that's a scientific word meaning "I can't rememberwhat they are called")

orAn unnamed gadget

• Haustellumpenetrates skin; labrum and hypopharynx form food and salivary canals

• Louse flies (Diptera)

• Hippoboscidae -includes sheep ked

4. Diptera: Louse fly subtype

• Ventral stylet(perhaps labium) is principal piercing organ. Intermediatestylet (perhaps hypopharynx) and dorsal stylet (perhaps fused maxillae) penetrate skin

• Sucking lice

5. Lice: piercing-sucking

Dr. PARVISH PANDYA’s presentationProboscis (galae of maxillae) forms food canal

6. Siphoning: Lepidoptera

Lepidoptera

7. Chewing-siphoning: Hymenoptera

Mandibles for chewing and labial glossa for siphoning. Example: honey bee

Hymenoptera

Non-insect : Ticks and mites

• Chelicerae cut skin

Tick head

Blood Pool

chelicera

10 Insect Mouth Parts

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