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 japonicaNewman

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

12. Scorpion Anatomy

14. chelicerae eyes pedipalp

15. Pseudoscorpion

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

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 cephalothorax abdomen

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

22. Abdomen Cephalothorax Chelicera (fang) Pedipalp Jumping Spider

23. Wolf spider with egg case Spitting spider Orb-weaving spider Tarantula

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 [one pair of antennae, head & trunk regions, trunk with many pairs of legs] 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.

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