1. Phylum Arthropoda

2. Arthropoda Name means “Joint” “foot” segmented coelomates with jointed appendages Exoskeletons of chitin Ecdysis (Molting) There are more known species of arthropods than all other phyla combined. Hemocoel (coelom only in embryo, then reduced in growth) Some fossils on land date back to before plants!!

4. Groups (4 Separate Phyla ??): Trilobite (extinct) Uniramia –Centipedes –Millipedes –insects Chelicerata –Spiders –Horseshoe crabs –Scorpions Crustaceans

5. Chelicerata –Spiders –Horseshoe crabs –Scorpioins

6. Arachnids: spiders, scorpions, ticks, mites, etc Body in just two sections –Combined cepahalothorax and abdomen 8 legs ( 4 segments to thorax) No antennae 1 pair of chlicera

7. Horseshoe Crabs Marine Chelicerate

9. Mandibulata –Uniramia : Centipedes. Millipedes, Insects –Crustaceans

10. Fig. 21.34

11. Basic Body plan Head Thorax Abdomen

12. Crustacea Crabs, Lobsters, Shrimp, Barnacles, Crayfish Rollie-Pollie “pill bugs”

15. Crayfish anatomy

18. Male Female

19. HEART Stomach Manidibular muscles Gills

23. Stomach Gastric Mill (teeth)

24. Green Glands

25. ( Aorta) Dorsal Hemolymph Vessel - red Intestine (“vein” in restraunts) dark

27. Insecta Basic Arthropod features Malpighian tubules Trachea, spiracles Ovipositors

32. Fig. 21.27

34. Pronotum

35. crop gizzard Gastric ceca

36. Nervous System Ganglia # 46

37. Fig. 21.35 Pierce- SuckSiphoning Sponging

39. Trachea # 40

40. Tracheal system attached to muscle

44. Mouth parts # 41

45. Ovipositor

46. Spiracles

47. Tympanum

48. Entomophagy (Yumm!!) Good source of protein Can be dried and powdered stores well

49. Orthoptera Grasshoppers, crickets 2 pair of wings 2 jumping legs Extended pronotum covering dorsal thorax

51. Lepitdoptera Moths, Butterflies 2 pairs of membranous wings, –covered in powdery scales

52. Parts of the wing (do not need to know)

53. Coleoptera 2 pair of wings 1 pair of wings leathery - Elytra –Meet in a line down back Lady Beetle

55. beetles

56. Diptera One pair of membranous wings Halters –balance –direction

60. Hymenoptera Bees, wasps, ants 2 pair of membranous wings Constricted abdomen Asexual reproduction is common- (parthenogenesis) –Fertilized eggs (2n) become queens –Unfertilized eggs (n) are drones. – In some species reportedly have no males at all !! Reproduce by 2n eggs.

61. Fig. CO 21

62. Fig. 21.28

67. Lepidoptera 4 wings Powdery scales Butterflies, moths