How could you tell a spider apart from a How could you tell a spider apart from a crayfish?crayfish?

What is the difference between these What is the difference between these mouthparts: mouthparts:

chelicerae, pedipalps, mandibles?chelicerae, pedipalps, mandibles?

Can you name these Famous Uniramians?

Would you like to taste these Would you like to taste these Uniramians???Uniramians???

Subphylum UniramiaSubphylum Uniramia

Centipedes

Millipedes

Insects

..over 900 000 types

Centipedes & Millipedes:Centipedes & Millipedes:long, worm like, many segments with legslong, worm like, many segments with legs

CENTIPEDESCENTIPEDES- carnivores- carnivores

-use poisonous claws-use poisonous claws

MILLIPEDESMILLIPEDES- detritus feeders- detritus feeders

- curl up in ball to hide- curl up in ball to hide

Characteristics of INSECTSCharacteristics of INSECTS

3-part body3-part body 3 pairs of legs 3 pairs of legs (attached to thorax)(attached to thorax)Also, usually:Also, usually: One pair antennaeOne pair antennae Compound eyesCompound eyes Wings (2 pairs)Wings (2 pairs) Tracheal tubesTracheal tubes

FeedingFeeding

3 pairs of appendages used as mouth 3 pairs of appendages used as mouth parts (rip & tear)parts (rip & tear)

SalivaSaliva Leg hairs Leg hairs

MovementMovement

3 pairs walking legs- spines, hooks3 pairs walking legs- spines, hooks LG muscles operate wings LG muscles operate wings Requires lots of energy (LG mitochondria)Requires lots of energy (LG mitochondria)

Insect Societies

Insect SocietiesInsect Societies

Different “castes” or types of individuals to Different “castes” or types of individuals to different jobsdifferent jobs

Reproductive femalesReproductive females “Queens” “Queens” Reproductive males Reproductive males fertilize Queen’s fertilize Queen’s

eggseggs WorkersWorkers Do all jobs EXCEPT reproductionDo all jobs EXCEPT reproduction

(watch young, get food, build (watch young, get food, build home etc)home etc)

Bees, ants and wasps- females are workersBees, ants and wasps- females are workers

Termites- male & female workersTermites- male & female workers

Insect CommunicationInsect Communication-sound /visual / chemical signals-sound /visual / chemical signals

Ex) Male crickets rub forewings together and chirp to find mates

Insect CommunicationInsect Communication

Ex) Male fireflies “FLASH” using light making organ on abdomen

Insect CommunicationInsect Communication

Pheremones:Pheremones: chemical signals that affect behaviour &/or chemical signals that affect behaviour &/or

developmentdevelopment

Can signal death / finding food Can signal death / finding food

Can control colonyCan control colony• Eg) Queen bee prevents development of rival QueenEg) Queen bee prevents development of rival Queen

Makes workers unable to lay eggsMakes workers unable to lay eggs

Honeybee CommunicationHoneybee Communication Use sound,movements & Use sound,movements &

pheremonespheremones Round dance:Round dance:

Signals food is less than Signals food is less than 50m away50m away

Waggle dance:Waggle dance:SignalSignals food is over 50m awayfood is over 50m away

Waggle dance