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ARTHRPPODS

ARTHRPPODS. Chapter 24. What is Entomology?. The study of insects (and their near relatives). Review of Zoological Nomenclature. Taxonomic Categories. Kingdom - Animalae Phylum - Arthropoda Class - Insecta Order - Coleoptera Family - Scarabaeidae Genus - Popillia Genus & species

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ARTHRPPODS

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  1. ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).

  2. Review of Zoological Nomenclature Taxonomic Categories Kingdom -Animalae Phylum - Arthropoda Class -Insecta Order -Coleoptera Family -Scarabaeidae Genus -Popillia Genus & species Popillia japonica Newman

  3. Characteristics of the Phylum Arthropoda 24.1 • Segmented bodies (e.g., head, thorax, abdomen). • Paired appendages (e.g., legs, antennae) are jointed. • Chitinousexoskeletion that must be shed. • Bilateral symmetry. • The nervous system is dorsal (belly) and the circulatory system is open and ventral (back).

  4. Arthropod Exoskeletons • Joints are made of stiff and flexible cuticle to allow movement. • The exoskeleton is made of many layers of chitin. • hard material that protects the body • must be shed in order to grow

  5. Crustaceans—live in oceans, freshwater streams, and on land Arthropod Classification • Chelicerates—specialized dagger-like mouthparts • Insects—most live on land, have six legs • Myriapods—long bodies and many pairs of legs

  6. Crustaceans(Marine Arthropods) 24.2 • two distinct body sections, cephalothorax and abdomen • one pair of appendages per segment • two pairs of antennae • exoskeleton • carapace

  7. Crustacean Appendages • Crustacean appendages are used for a variety of functions. • collecting and manipulating food • attracting females • Protection • claws, antennae, walking legs, swimmerets, and mandibles.

  8. Types of Crustaceans. • Decapods such as lobsters and crabs have ten legs. • Isopods such as pill bugs • have flattened bodies • and seven pairs of legs. • Barnacles are sessile filter • feeders wrapped in a hard shell.

  9. fangs poison gland spinnerets Chelicerate Arthropod Characters: • Pincher-like mouthparts - chelicerae • NO antennae • Two body regions, usually - cephalothorax & abdomen • Four pairs of legs • Horseshoe crabs and arachnids are only living groups 24.3

  10. Arachnids are the largest group of chelicerates. • There are three major groups of chelicerates. • horseshoe crabs • sea spiders • arachnids

  11. Arachnids -- Spiders • All spiders make silk and produce venom.

  12. Metamorphosis CHANGE IN FORM FROM EGG TO ADULT

  13. Incomplete INCOMPLETEMETAMORPHOUS Insects change shape gradually!

  14. CompleteMetamorphosis Four stages that all look different

  15. Insects with Complete Metamorphosis • beetles • bees, ants, wasps • Flies • butterflies EGG  LARVA  PUPA  ADULT

  16. Insects with Incomplete Metamorphosis EGG  NYMPH  ADULT • fleas • grasshoppers & crickets Wings NOT fully developed

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