Lecture 2Outline of previous lectureI. ClassificationII. CharacteristicsOutline of current lectureI. ClassificationII. Classes of arthropodsIII. Class: crustaceaIV. Class: DiplopodaV. Class: ChilopodaVI. Class: InsectaCurrent lectureClassificationKingdom-AnamaliaPhylum-ArthropodaBilateral symmetrySegmented appendagesExoskeleton with chitinExternally segmented odiesAppendages modified for feedingExcretionCirculatory systemRespirationVentral nerve cord and dorsal brainReproductionClasses of ArthropodsCrustaceanschilopodsArachnidsInsectsDiplopodsClass: CrustaceaCrustaceansCrabs, lobsters, pillbugs, shrimp, daphnia (water flees), copepods2 body regionsCephalothorax (head and thorax region)Legs, mouth partFull of calciumAbdomenReproductive organsSofter2 pairs of antennae5 or more pairs of legsimportancemostly aquaticfoodintermediate host for many parasitesGuinea worm disease-freshwater(Dracunculus medinensis)Humans, pets, livestock in Africa and AsiaMesopredators in North AmericaGoes in water flees and infests waterGoes to the stomach then to feet, arms, legs, chest of victimsBoilsBurning sensationsWorms come out of bodyAlmost eradicated because its so grossClass: DiplopodaMillipedesfeed on plantsvery long body2 pairs of legs per segment2 body regionsheadbody1 pair antennaemany legs2 pair per body regionimportanceno sting or bitepoisonous secretion not dangerousplant pestintermediate host for parasitesvery round bodyClass: ChilopodaCentipedes2 body regionsheadbody1 pair antennaemany legs1 pair per body regionImportanceModified first pair of lets“fangs” with venom glandsGeneralist predatorsCan be dangerous to animals and humansHouse centipede harmless to peoplePoisonous vs. venomousPoison-any substance that can cause physiological disruptionAt high enough dosageVenom-group of poisons produced in glands ( stinger, pincher etc.) system to get venom into prey-injectedVenom acts on nervous systemBreathing and respiration shuts downClass: ArachnidaSpiders, mites, ticks, scorpionsCharacteristicsChelicera and pedipalpiNo antennae4 pairs of legs (8 legs total)cephalothorax and abdomenOrder: scorpionidaVenom gland at tip of abdomen (for protection)PedipalpiCuticle fluoresces under UV light18 species in TexasMost common-Centruoides vittatusStriped bark scorpionIndoors/climb-infest atticsSmall dogs at riskOrder Aranae (spider)All spiders are venomousTarantulas (west texas)Dislarge hairs under skin-cause irritationMales mass migrateLatrodectus mactansBlack widow-pain/cramps/nausea/killAnti-venom availableMesh web-low to groundLoxosclese reclusaBrown reclusViolent markingHunt at nightClass: InsectaInsectsCharacteristicsThree body regions (as adults)HeadThoraxAbdomenthree pairs of thoracle legspair of antennaegreatest number of species that are parasites of man/animalsENTO 208 1st EditionLecture 2  Outline of previous lecture I. Classification II. Characteristics  Outline of current lectureI. Classification II. Classes of arthropods III. Class: crustacea IV. Class: DiplopodaV. Class: Chilopoda VI. Class: Insecta  Current lecture  Classification - Kingdom-Anamalia o Phylum-Arthropoda- Bilateral symmetry - Segmented appendages - Exoskeleton with chitin - Externally segmented odies - Appendages modified for feeding - Excretion - Circulatory system - Respiration 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.- Ventral nerve cord and dorsal brain - Reproduction  Classes of Arthropods - Crustaceans- chilopods- Arachnids- Insects- Diplopods  Class: Crustacea - Crustaceans - Crabs, lobsters, pillbugs, shrimp, daphnia (water flees), copepods- 2 body regions o Cephalothorax (head and thorax region) Legs, mouth part  Full of calciumo Abdomen  Reproductive organs  Softer - 2 pairs of antennae - 5 or more pairs of legs - importance o mostly aquatic o foodo intermediate host for many parasites  Guinea worm disease-freshwater  (Dracunculus medinensis) Humans, pets, livestock in Africa and Asia  Mesopredators in North America - Goes in water flees and infests water - Goes to the stomach then to feet, arms, legs, chest of victims - Boils - Burning sensations - Worms come out of body o Almost eradicated because its so gross  Class: Diplopoda- Millipedes o feed on plantso very long body o 2 pairs of legs per segment - 2 body regionso head o body - 1 pair antennae - many legs o 2 pair per body region - importance o no sting or biteo poisonous secretion not dangerous o plant pest o intermediate host for parasiteso very round body  Class: Chilopoda- Centipedes - 2 body regions o head o body - 1 pair antennae - many legs o 1 pair per body region - Importance o Modified first pair of lets  “fangs” with venom glands o Generalist predators  Can be dangerous to animals and humans o House centipede harmless to people  Poisonous vs. venomous- Poison-any substance that can cause physiological disruptiono At high enough dosage - Venom-group of poisons produced in glands ( stinger, pincher etc.) system to get venom into prey-injected o Venom acts on nervous system Breathing and respiration shuts down  Class: Arachnida- Spiders, mites, ticks, scorpions- Characteristics o Chelicera and pedipalpi o No antennae o 4 pairs of legs (8 legs total) o cephalothorax and abdomen- Order: scorpionidao Venom gland at tip of abdomen (for protection) o Pedipalpi o Cuticle fluoresces under UV light o 18 species in Texas  Most common-Centruoides vittatus  Striped bark scorpion Indoors/climb-infest attics  Small dogs at risk - Order Aranae (spider) o All spiders are venomous Tarantulas (west texas)  Dislarge hairs under skin-cause irritation  Males mass migrate o Latrodectus mactans  Black widow-pain/cramps/nausea/kill Anti-venom available Mesh web-low to ground o Loxosclese reclusa Brown reclus  Violent marking  Hunt at night  Class: Insecta - Insects - Characteristics o Three body regions (as adults) Head Thorax Abdomen o three pairs of thoracle legs o pair of antennae - greatest number of species that are parasites of