Lecture 3Outline of previous lectureI. ClassificationII. Classes of arthropodsIII. Class: CrustaceaIV. Class: DiplopodaV. Class: ChilopodaVI. Class: InsectaOutline of current lectureI. Body planII. HeadIII. Eyesa. Simpleb. CompoundIV. Grasshopper mouthpartsV. Insect antennaeVI. ThoraxVII. LegsVIII. WingsCurrent lectureBasic Body planThree body regions (as adults)Head, thorax, abdomenThree pairs of thoracic legsPair of antennaeHeadSegmentsRigidSclartinProtection of brain and sensory organsSensoryEyesAntenna(e)1 pair-smell things with antennaeIngestion of foodEyesCompound Eye OmmatidiumPhotoperiodism-determine length of dayLarger=more resolutionAllow for pixels in lensGood for predators (grasshoppers) b/c fly around quicklySimple eye0,1,2, or 3differentiate between light and darkInsect mouthpartsMandibulateChewing (primitive)HaustellatePiercing/suckingProbing/sippingSponging/lappingGrasshopper MouthpartsClypeusLabrumMandibleTearing and cuttingGrindingFeeding and defenseMaxillaSlicing lobesMaxillary palps-allow for tasting of foodProtection from poisonsLabial and maxillary palpsHypopharynxBelow throat (tongue)Insect antennaeSetaceous-bristle-like (dragonflies)Filiform-thread-like (ground beetles and cockroaches)Moniliform-bead-like (termite)Serrate-sawtoothed (click beetles)Clavate-gradually clubbed (carrion beetles)Capitate-abruptly clubbed (butterflies)Lamellate-nested plates (scarab beetles)Pectinate-comb-like (fire-colored beetles and male glow-worms)Plumose-brush-like (mosquitos)Geniculate-elbowed (Weevils and ants)Aristate-pouch-like with lateral bristles (house flies)ThoraxCenter of locomotionRigid-lots of sclaritinMade of 3 body segmentsProthorax-firstMesothorax-middleMetathorax-backDorsal tergum (notum)Ventral sternumLateral pleuraGeneral terminology1-pronotum2-mesonotum3-metanotum4-propleuron5-mesopleuron6-metapleuron7-prosternum8-mesosternum9-metasternumall adult insects possess legs on metapleuron and/or metasternumLegsone pair per thoracic segment5 segmentsInsect wingsPrimarily found on mature insectsSome insects secondarily lost wingsVeins used for strength and identificationInsect abdomen9-11 segments but hard to ID last segmentstergum-dorsalsternum-ventralENTO 208 1st EditionLecture 3  Outline of previous lecture I. Classification II. Classes of arthropods III. Class: Crustacea IV. Class: DiplopodaV. Class: Chilopoda VI. Class: Insecta  Outline of current lecture I. Body plan II. Head III. Eyes a. Simple b. Compound IV. Grasshopper mouthparts V. Insect antennae VI. Thorax VII. Legs VIII. Wings  Current lecture  Basic Body plan - Three body regions (as adults)o Head, thorax, abdomen These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Three pairs of thoracic legs - Pair of antennae  Head - Segments - Rigid o Sclartin Protection of brain and sensory organs - Sensory o Eyes o Antenna(e) 1 pair-smell things with antennae - Ingestion of food  Eyes - Compound Eye Ommatidium o Photoperiodism-determine length of dayo Larger=more resolution  Allow for pixels in lens Good for predators (grasshoppers) b/c fly around quickly- Simple eyeo 0,1,2, or 3o differentiate between light and dark  Insect mouthparts - Mandibulateo Chewing (primitive)- Haustellate o Piercing/suckingo Probing/sipping o Sponging/lapping  Grasshopper Mouthparts - Clypeus - Labrum - Mandible o Tearing and cutting o Grinding o Feeding and defense - Maxillao Slicing lobes o Maxillary palps-allow for tasting of food  Protection from poisons- Labial and maxillary palps - Hypopharynxo Below throat (tongue)  Insect antennae - Setaceous-bristle-like (dragonflies)- Filiform-thread-like (ground beetles and cockroaches)- Moniliform-bead-like (termite) - Serrate-sawtoothed (click beetles)- Clavate-gradually clubbed (carrion beetles)- Capitate-abruptly clubbed (butterflies)- Lamellate-nested plates (scarab beetles)- Pectinate-comb-like (fire-colored beetles and male glow-worms) - Plumose-brush-like (mosquitos)- Geniculate-elbowed (Weevils and ants)- Aristate-pouch-like with lateral bristles (house flies)  Thorax- Center of locomotiono Rigid-lots of sclaritin - Made of 3 body segments o Prothorax-first o Mesothorax-middle o Metathorax-back - Dorsal tergum (notum) - Ventral sternum - Lateral pleura - General terminology o 1-pronotum o 2-mesonotum o 3-metanotum o 4-propleuron o 5-mesopleuron o 6-metapleurono 7-prosternumo 8-mesosternumo 9-metasternum  all adult insects possess legs on metapleuron and/or metasternum Legs - one pair per thoracic segment - 5 segments  Insect wings - Primarily found on mature insects - Some insects secondarily lost wingso Veins used for strength and identification  Insect abdomen - 9-11 segments but hard to ID last segments o tergum-dorsalo