1. Arthropods

2. What is Entomology? The study of insects (and their near relatives). What are insects (and near relatives)? Insects and their relatives are ARTHROPODS.

3. Review of Zoological Nomenclature (classifying & naming) Taxonomic Categories Phylum Class Order Family Genus Genus & species

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

5. Characteristics of the Phylum Arthropoda The segmented bodies are arranged into regions, called tagmata (e.g., head, thorax, abdomen). The paired appendages (e.g., legs, antennae) are jointed. They posses a chitinous exoskeletion that must be shed during growth. They have bilateral symmetry. The nervous system is dorsal (belly) and the circulatory system is open and ventral (back).

6. What are some other Animal Phyla? Porifera & Cnidaria – sponges & corals. Platyhelminthes - flatworms, tapeworms Nematoda - roundworms Mollusca - clams, snails & slugs, squids Echinodermata - starfish, sea urchins Annelida - segmented worms (earthworms) Chordata - fish, amphibians, reptiles, birds, mammals

7. Arthropod Groups (taxa) The arthropods are divided into two large groups that exist today: Chelicerates and Mandibulates

8. Chelicerate Arthropod Characters: Pincher-like mouthparts - chelicerae - and pedipalps NO antennae Two body regions, usually - cephalothorax & abdomen Four pairs of legs Horseshoe crabs and arachnids are only living groups

9. Mandibulate Arthropod Characters: Mouthparts are mandibles - normally chewing sideways One or two pairs of antennae Various body region arrangements - cephalothorax & abdomen / head & trunk / head, thorax & abdomen Variable leg numbers Insects, crustaceans & myriapods

10. Orders of Arachnids Scorpions Pseudoscorpions Daddy Long-Legs Mites & Ticks Spiders

11. Scorpion Tick (a mite) Pseudoscorpion Daddy-long-legs Wolf Spider

12. Scorpion Anatomy

14. chelicerae eyespedipalp

15. Pseudoscorpion

16. pedipalps & chelicerae cephalothorax abdomen Mite and Tick Body Regions

17. American dog tick male Blacklegged (deer) tick female

18. American dog tick female laying egg mass (1000-2000 eggs!).

19. Clover mites Twospotted spider mites Predatory mite

20. daddy long-legs cephalothoraxabdomen

21. pedipalp chelicera (fang) cephalothorax abdomen narrow waist Spider Anatomy

22. Abdomen Pedipalp Chelicera (fang) Cephalothorax Jumping Spider

23. Wolf spider with egg caseSpitting spider Tarantula Orb-weaving spider

24. Black widow with egg case Brown recluse

25. Classes of Myriapods (many legged arthropods) (all have one pair of antennae, a head region, and trunk with many pairs of legs, use trachea) Diplopoda - millipedes Chilopoda - centipedes

26. Myriapods Millipede (Diplopoda) Two pair of legs per visible segment, attached under body. Centipede (Chilopoda) Pair of fangs under head, one pair legs per visible segment - attached to side of body. No fangs, no eyes, legs attached to side of body. [one pair of antennae, head & trunk regions, trunk with many pairs of legs]

27. Millipede (Diplopoda) Centipede (Chilopoda) Garden centipede

28. Classes of Crustacea mostly marine, fresh water, a few terrestrial all have two pair of antennae five or more pairs of legs segmented abdominal appendages head & trunk or cephalothorax & abdomen body arrangement have gills Sowbugs or pillbugs Sand fleas Barnacles Crabs, lobster, shrimp

29. Crayfish cephalothorax (Decapoda) Sowbug (Isopoda), a terrestrial crustacean