World of Insects - Westerville City School District

World of Insects - Westerville City School District

World of Insects Characteristics, Orders, and Collecting What You Should Know About Insects Taxonomy Kingdom Animalia Phylum Arthropoda Class - Insecta

Insects Are Arthropods Insects are the largest group of Arthropods Jointed appendages (bendable) Segmented bodies Exoskeleton of Chitin that must be molted to grow Related to spiders, ticks,

scorpions, millipedes, MAIN CHARACTERISTICS Three body regions head, thorax, and abdomen One pair antenna (head) Six legs or 3 pairs (thorax) One-two pairs of wings (thorax)

Count the Legs! There are ALWAYS SIX legs, and they are attached to the THORAX Antenna One Pair on head Jointed Sensory (smell) Called feelers Filiform most

common shape (segments = size) May be modified FILIFORM

Antenna Modifications Wings or No Wings Most adults have 2 pairs Called forewings and hindwings Some insects are wingless

(silverfish, fleas, some termites and ants) More on Wings A network of Veins strengthens wings MEMBRANEOUS (clear) WINGS

Some Wings Are Covered With Powdery Scales BUTTERFLIES & MOTHS Wings May Be Modified Order Diptera (flies) 2nd pair of wings modified into

HALTERES Used for balance Makes flies hard to catch! Beetle Wings Hard Forewing ELYTR

A called Elytra Meet in straight line down the abdomen Membranous hindwings folded underneath (flight) CIRCLE THE INSECTS

INSECT ORDERS INSECTS WITH WINGS Why Cant I Call All of Them Bugs? EVERY BUG is an insect, but NOT ALL INSECTS are bugs! True BUGS are in the

Order HEMIPTERA Posterior thorax is triangular; called SCUTELLUM Last 3rd of wing CLEAR Which of these are BUGS? ALL

More Hemipterans Assassin Bug Water Boatman Giant Water Bug Leaf Hopper

Coleoptera Called beetles Tough exoskeleton Forewings called Elytra Fly with membranous hindwings

Larva called grubs Cucumber beetle Ladybird beetle Rhinoceros beetle

Ephemeroptera Called Mayflies Juveniles are aquatic; called naiads Adults found near water & dont feed Adults reproduce & die in 24 hours Soft bodies with 2

long Ceri (tail ADULT NAIAD Diptera Contains mosquitoes & flies One pair

Green Bottle functional fly wings Club-shaped halteres for balance Bodies oftenFruit Fly hairy Hover Fly

Aedes Mosquito Dermaptera Called earwigs Long, flat bodies Forceps (pincers) on end of abdomen Short, hard forewings (membranous

wings folded underneath Large jaws (mandibles) on PINCERS EARWIG EATING CATERPILLAR Orthoptera

Grasshoppers, locusts, crickets, katydids Very long bodies Rear legs modified for jumping Females with egg laying tube (ovipositor on end of abdomen) Often communicate

with chirping Lepidoptera Moths, butterflies, & skippers Siphoning mouthparts coiled under head Powdery scales on wings Butterflies fold wings

flat above body at rest Moths are night active Neuroptera Lacewings Net veined wings Small, delicate insects

Long antenna Predators on other insects May feed on nectar Thysanoptera Thrips Two pairs of fringed wings Feed on plant sap

Isoptera Termites Live in colonies Feed on wood Soft bodies & short antenna Castes workers, soldiers, kings, and queen

Mecoptera Scorpion flies Last abdominal segments curved like scorpion Two pairs of narrow wings Head elongated into a beak (rostrum)

Long antenna Homoptera Cicadas, leaf hoppers, wingless aphids If wings present, held roof like over body &

membranous Piercingsucking Aphid s Cicad a Leafhopp er

Odonata Dragonflies & damselflies Dragonflies hold clear wings spread perpendicular to body at rest Damselflies hold clear wings

together over abdomen Plecoptera Stoneflies Aquatic nymphs Aerial adults are short lived Make drumming

sound to find mates Hymenoptera Bees, ants, wasps Narrow waist connects thorax & abdomen Abdomen

curved downward May have Carpenter bee Red ant Yellow

jacket INSECT ORDERS WINGLESS INSECTS Thysanura Called Silverfish Found around houses or outside under stones or wood

Fast runners Damage books Secretive and active at night. Flat, long bodies Long antennae Three, long, tail like appendages Siphonaptera Fleas

Ectoparasites Bodies laterally compressed Enlarged hind jumping legs Very short antenna Collembola Called

springtails Small & soft bodied Furcula (jumping mechanism) on abdomen Furcula folds under the body at rest Found in

Anoplura Sucking lice Parasites of mammals Very small Head and body lice are examples Attracted to childrens fine hair

Carry disease Mallophaga Biting lice External parasites on birds & mammals Broad head & flattened body Feed on dead

skin, feathers, and fur Metamorphosis CHANGE IN FORM FROM EGG TO ADULT INCOMPLETE METAMORPHOU S

Incomplete Insects change shape gradually! Complete Metamorphosis Four stages that all look

Amorphic Insects Silverfish Springtails Insects with Complete Metamorphosis EGG LARVA PUPA ADULT Coleoptera (beetles)

Hymenoptera (bees, ants, wasps) Diptera (flies) Lepidoptera (butterflies) Insects with Incomplete Metamorphosis EGG NYMPH ADULT Siphonaptera (fleas) Isoptera (termites)

Orthoptera (grasshoppers & crickets) Hemiptera (true bugs) Homoptera (cicadas & hoppers) Wings NOT fully developed

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