The document provides an overview of Phylum Arthropoda, which includes insects, arachnids, crustaceans, millipedes, centipedes, and others. It describes key characteristics like segmented bodies, jointed appendages, and a chitinous exoskeleton. Examples are given for each class, describing features like number of body sections, legs, respiration methods, and habitats. Life cycles and images of common orders and species are also included to illustrate the diversity within the phylum.

1. Introduction to Phylum Arthropoda Dr. Vera Krischik, Department of Entomology, University of Minnesota

5. Class Crustacea: Crabs, lobsters, sowbugs Pillbugs

7. Class Chilopoda: Centipedes Georgia Forestry Commission Archives Georgia Forestry Commission www.forestryimages.org Fangs of Scolopendrid Centipede (above) House Centipede, Scutigera coleoptrata (right) Department of Entomology, University of Nebraska-Lincoln

9. Class Diplopoda: Millipedes Photos by William Leonard, Tree of Life Web Project, http://tolweb.org/tree/phylogeny.html

10. Class Arachnida: Spiders, ticks, mites, harvestman, scorpions, etc. Yellow Garden Spider Tick Mite

13. Class Arachnida: Order Araneae: Spiders David Keith, Department of Entomology University of Nebraska-Lincoln Crab Spider, Misumenoides formosipes Wolf Spider, Lycosa carolinensis James O. Howell, The University of Georgia, www.forestryimages.org

16. Class Arachnida: Order Scorpiones: Scorpions Northern Desert Hairy Scorpion, Hadrurus spadix , native to US E. Tenczar Emperor Scorpion, Pandinus imperator , female eating cockroach, native to West Africa E. Tenczar

17. Class Arachnida: Order Scorpiones: Scorpions Arizona Bark Scorpion, Centruroides exilicauda , mating E. Tenczar

18. Class Arachnida: Order Scorpiones: Scorpions Lined Devil Scorpion, Vaejovis spinigerus , female from Arizona with young Flat Rock Scorpion, Hadogenes troglodytes , female, native to South Africa E. Tenczar E. Tenczar

19. Class Arachnida: Order Scorpiones: Scorpions Slenderbrown Bark Scorpion, Centruroides gracilis , male from Central America Pandinus imperator ; scorpions glow under UV/ black light E. Tenczar E. Tenczar

20. Class Arachnida: Order Scorpiones: Scorpions E. Tenczar E. Tenczar Black Thick-Tailed Scorpion, Parabuthus transvaalicus , a highly venomous species native to South Africa

26. Mite Life Cycles

30. Family Phytoseiidae: Predatory mites Predatory mites: Phytoseiulus persimilis

53. Order Hemiptera: Suborder Sternorrhyncha Soft Scale (formerly in Order Homoptera) Tuliptree Scale, Toumeyella liriodendri : Linden, walnut Summer Male Summer Female and Crawlers Gerald J. Lenhard, www.insectimages.org

54. Order Hemiptera: Suborder Sternorrhyncha Armored Scale (formerly in Order Homoptera) Euonymus Scale, Unaspis euonymi Clemson University - USDA Cooperative Extension Slide Series, www.insectimages.org

55. Order Hemiptera: Suborder Auchenorhyncha Cicadas, hoppers (formerly Order Homoptera) Spittlebug Leafhopper

58. Class Insecta: Order Neuroptera: Lacewings, antlions, owlflies Green Lacewing, Chrysoperla sp., Adult (left) and Larva (right) Bradley Higbee, Paramount Farming, www.insectimages.org

60. Class Insecta: Order Coleoptera: Beetles Japanese Beetle, Popillia japonica , Adult (left) and Scarab Larva (below)

64. Class Insecta: Order Diptera: Flies Tachinid Fly Adult Michigan State University http://www.msue.msu.edu/vanburen/fappmag.htm Fly Larva (maggot)

67. Class Insecta: Order Lepidoptera: Moths and butterflies Cankerworm Larvae (right) and Adult (below) CUES http://www.entomology.umn.edu/cues/dx/vk/canker.htm

69. Class Insecta: Order Hymenoptera: Sawflies, wasps, bees, ants Introduced Pine Sawfly, Diprion similis , Adults (left) and Larva (right) John H. Ghent USDA Forest Service www.forestryimages.org CUES, http://www.entomology.umn.edu/cues/dx/sk/pine11.htm