Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Arthropods Subphylum Mandibulata •Class Myriapoda •= chilopoda and diplopoda Chilopods ~ 3,000 centipedes Single pair of antennae Pair of mandibles Eyes simple when present Diplopoda ~ 10,000 millipedes Mostly deposit feeders in soil some carnivores 2 pair legs per segment Hexapoda = six-footed •Class Insecta •Well-studied •Impacts on ag, pollination, disease vectors, commercial products •~1,000,000 species described •4X more to be described Insect taxonomy Silverfish = Order Zygentoma Subclass Pterygota = winged insects Winged insects Order Ephemeroptera: mayflies wings cannot be folded adults live hours to few days larvae are aquatic Winged insects Order Odonata = damselflies and dragonflies wings cannot be folded aquatic larvae predators Winged insects Order Orthoptera = crickets, grasshoppers produce noise by rubbing wings Winged insects • Order Plecoptera = stoneflies – Adults live only long enough to mate – Aquatic larvae, drumming behavior Winged insects Order Hemiptera = true bugs piercing mouthparts Winged insects Order Coleoptera = beetles front pair of wings form protective cover Winged insects • Order Diptera = true flies – Posterior wings are reduced = halteres – Aquatic larvae in some Winged insects Order Trichoptera = caddisflies like small moths, feed on liquids aquatic larvae = case-builders Winged insects • Order Lepidoptera = moths and butterflies – Larvae = caterpillars Insect body Head, thorax, abdomen Insect head •4 paired appendages: •One pair antennae •Mandibles, maxillae, labium = lower lip Insect thorax •Two pairs of wings •Reduced 2nd pair in diptera = halteres Insect senses •Tympanal organs = hearing •Compound eyes and ocelli Gas exchange Water balance Insects produce uric acid from protein metabolites Malpighian tubules Insect development - instars Metamorphosis hemimetabolous = gradual holometabolous = larva – pupa -adult