Ch 16 Ambulacraria

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Across
  1. 4. pincerlike structures associated with echinoderm spines
  2. 7. worm-like basal deuterostome phyla
  3. 8. crown-stalk joiner of crinoids
  4. 9. type of feet seen in most echinoderms
  5. 11. feeding part of a crinoid; consists of arms with pinnules
  6. 14. echinoderm class of brittle and basket stars
  7. 15. phylum of sea stars, urchins, and crinoids
  8. 17. what an enteropneust hemichordate eats with
  9. 18. echinoderm class of sea stars and sea dasies
  10. 20. sea star stomach at oral end
  11. 21. symmetry type of adult sea stars
  12. 22. type of vascular system seen only in echinodermata
  13. 23. hemichordate body part with pharyngeal slits
  14. 24. dermal ______ help with sea star exchange
Down
  1. 1. sea star stomach at aboral end
  2. 2. pharyngeal _____; homologous chordata ambulacraria trait
  3. 3. phylum of acorn worms
  4. 5. hemichordate class with arms on collar, suspension feeders
  5. 6. feeding structures of pterobranch hemichordates
  6. 10. most basal echinoderm class; crown and stalk
  7. 12. echinoderm class of sea urchins, gonads aboral
  8. 13. echinoderm class of sea cucumbers, single gonad
  9. 16. _____ groove; series of ossicles supporting echinoderm arms
  10. 18. greek philosopher; also name of urchin mouthparts, in part
  11. 19. hemichordate class with no arms on collar
  12. 20. hemichordate body region with mouth