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2. class with sea spiders, sucking porboscis, reduced episthosoma, internal organs within legs
7. subphylum with 2 pair of antennae, biramous appendages, tagmata includes cephalothorax and abdomen,marine,freshwater,terrestrial
8. incomplete and gradual metamorphosis, egg-naiad-adult or imago, dragon flies, mayfly, stonefly
13. incomplete metamorphosis, egg-nymph-adult, bugs, roaches, grasshoppers
15. sea lilies, sea feather, pinnules, some sessile, stalked, mobile
16. sea stars, 5 arms, regeneration, many prey on bivalves
17. subphylum with function independently, tagmata, 8 legs and no antennae
18. latrodectes mactans,dangerous species
20. rolly pollies
21. phylum with endoskeleton; water vascular system; pedicellarieae; pentamerous radial symmetry; autonomy and regeneration; mouth from 2nd opening
25. spike like tail
26. 8 legs, no antennae, some venomous

1. serpent stars, brittle stars, basket stars, slender arms, central disc, closed ambulacral groove, predatory and suspension feeders
3. millipedes, detritivores, 2 pairs legs per diplosegment, repugnatorial glands
4. sea daisies; simple structure;disc peripheral tube feet
5. no metamorphosis, eggs are immature, no wings, springtails, silverfish
6. centipedes, tagmata includes head and trunk
9. urchins sand dollars; fused dermal ossicles; no arms; ambulacral grooce; aristotle's lantern
10. glands release things that smell bad
11. order that sting on metasoma
12. complete metamorphosis, egg-larva-pupa-adult,moth beetles, flies, fleas, butterflies
14. subphylum with unbranched appendages and mouth parts are mandibles
19. fangs,venomous
22. sea cucumber, sea apples, reduced dermal ossicles, tentacles, sessile, sedentary, or errant
23. horse shoe crabs, carapace, telson, simple and compound eyes, book gills
24. subphylum all extinct, biramous appendages, mandibles and antennae, 3 lobed abdomen