What makes an insect, an insect? - Ohio State University...Insect Development Insects transform from...

Whatmakesaninsect,aninsect?

Head(sensory)

Thorax(locomo3on)

Abdomen(Rs/Dg/El/Rp)

LegParts

CompoundEye

AntennaCoxa(hip)

Femur

TibiaTarsus

Claw

FrontWing HindWing

HindWingRemoved

Exoskeleton–anexternalskeletonthatbothprotectsandsupportstheinsect’sbody.

InsectEyes

DragonFly

LonghornedBeetle

SwallowtailCaterpillar

Spider

PrayingManAs

InsectMouthPartsTwoGeneralTypes:

ChewingSucking

GrasshopperChewing

HoneybeeLapping

PiercingSucking

PiercingSucking

Mosquito

Flea

Cicada

Housefly-SpongingBuQerflySiphoning

ThripsRasping/Sucking

InsectMouthParts

Chewing

Sucking

Sponging

PiercingSucking

Siphoning

ChewingEvidence

JapaneseBeetle

EvidenceofPiercingSucking

InsectAntennae

Moth

GroundBeetle

InsectWings

FrontandHindWings

Whatelsehaswings?

Birds

Bats

MulAColoredAsianLadyBeetle

ExcepAons

BoxelderBugNymphs

InsectDevelopment

InsectstransformfromeggtoadultintwodisAnctwaysIncompleteMetamorphosis–insectsprogressthroughachangeinsizebutnotinform.CompleteMetamorphosis–InsectsprogressthroughadramaAcchangeinform.

Examples:Grasshoppers,PrayingmanAds,Termites,Aphids,TrueBugs,Earwigs,etc.

IncompleteMetamorphosis

Theexoskeletonmustbemoltedbetweenthedifferentsizes(instars).

Nymph

Eggs

Adults

Adult

ChinchBug

Examples:Ants,Bees,Wasps,BuTerflies,Fleas,Flies,Beetles,Moths

CompleteMetamorphosis

Growthbetweenthedifferentlarvalinstarsmustbeaccompaniedbymol3ng.

MothraEgg

MothraLarva

MothraAdultwithGodzilla

Secondinstar

CecropiaMoth

ThirdInstar

FourthInstar

FiVhInstar

BegintoSpin

Cocoon

FullyDevelopedFiVhInstar

PupaRevealed

Cocoonase

JuvenileHormone

JuvenileHormoneEffectsonPyrrhocorisapterus(Firebug)

5thInstarNymph

Adult“6thInstarNymph”

“7thInstarNymph”

normal

+ JH

+ JH

InsectOrders

PictorialOverviewandNotaLaAnLesson.

Kingdom:Animalia

Class:HexapodaorInsecta(Insects)Phylum:Arthropoda(“JointedFoot”animals)

Order:Diptera,Coleoptera,etc.

StressSpeciesDiversity

Insectscanbefriendly

Insectscanbecool

Order:Diptera•  Flies,Mosquitoes•  Onlyhaveasinglepairofwings&andapairofhalteresinplaceofhindwings

CraneFly

Halteres

Order:Diptera

•  OnlyfemalestakeabloodmealforeggproducAon•  ManyfuncAonasdecomposers•  Completemetamorphosis•  Spongingandpiercing/suckingmouthparts•  18.2K,120K

SpeciesinNorthAmerica

SpeciesWorldwide

•  Flies,Mosquitoes•  Onlyhaveasinglepairofwings&andapairofhalteresinplaceofhindwings

AdultHorseFly

AdultHouseFly

singlyorraV-like

fourlarvalstagesin~week

wigglers

tumblers

~threedays

AdultfemalemosquitoesarereadyforabloodmealonetotwodaysaVeremergence