BIOE 122 Ivertebrates Cnidaria Terms

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jgascaco
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207165
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BIOE 122 Ivertebrates Cnidaria Terms
Updated:
2013-03-19 15:15:33
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Bioe 122 Invertebrates Cnidaria Terms zoology morphology function
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Invertabrate zoology terms for Porifera and Cnidaria phyllum
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  1. Cnideria
    • Cnida = "nettle"
    • have cnidocytes with nematocysts
    • jellies, anemones, hydros, corrals
    • diploblastic
    • radial symmetry
    • two-way gut
    • two basic body plans : polyp and medusa
  2. Cnideria classes
    • Hydrozoa
    • Scyphozoa
    • Anthozoa
  3. Hydrozoa
    • "hydra animal"
    • has polyp and medusa form
    • mostly marine, few freshwater
    • acellular mesoglea
    • gastrodermis endoderm that lacks nematocysts
    • eggs/sperm eject via ectoderm
  4. Medusozoa
    • Cnidaria Subphylum
    • "medusa animal"
    • has medusa bp
    • includes scyphozoa and hydrozoa
  5. oral vs aboral
    • oral - orientation/area where mouth is located
    • aboral - region opposite side of the mouth
  6. gastrovascular cavity
    • all internal space of an organism
    • modified to have specialized regions
  7. nematocyst
    • "thread capsule"
    • stinging tool
  8. exumbrella
    aboral side of medusa
  9. ring canal
    area between the tentacular and the radial canal
  10. hydranth
    end of hydroid with tentacles
  11. manubrium
    • aka hypostome
    • an evasion at the oral side of the medusa that contains the mouth
  12. gastrozooids
    feeding polyp for hydroids
  13. polymorphism
    various forms of the same species due to specialization
  14. strobilation
    • schyphozoans
    • scyphistomae asexually produce young medusae
  15. complete septum
    septa that span the coeleteron and join the pharynx
  16. oral disc
    wide area on top of the column containing the mouth
  17. Scyphozoa
    • "cup animal"
    • meduas and jellies
    • medusa stage dominate
    • gastric fillaments
    • nematocysts
    • thick mesoglea
    • no nerve rings but with nerve net
    • simple and separate polyps
  18. polyp
    • cnidarian bd
    • trunk
    • tentacles
    • oral end at tentacles
    • can be anchoring
  19. mesoglea
    • "middle jelly"
    • mostly water and protein to keep structure
    • forms hydrostatic skeleton
  20. cnidoctyte
    • cnidarians
    • sensory effector cell
    • for prey capture, defence and prey immobiliation
  21. sub-umbrella
    oral surface of a medusa
  22. thecate
    perisarc only goes around stalk
  23. hydrocaulus
    • Hydrozoa
    • hollow cavity in the middle of a polyp
    • directly connects individuals of a colony
  24. gonozooids
    • hydrozoa
    • reproductive zooid
  25. incomplete septum
    septa only partially attached to the pharynx
  26. column
    stalk of the polyp
  27. periderm
    chitonous exoskeleton excreted by pedal disc and column of polyp
  28. aquiferous system
    internal water network
  29. Anthozoa
    • "plant animal"
    • corals and anemones
    • lack a medusa stage (polyps only)
    • large distinct complex polyps
    • have pharynx
    • subdivided gvc
  30. medusa
    • jelly form
    • big bulb
    • lots of tentacles
    • oral end near tentacles
  31. radial symmetry
    circular symmetry
  32. gastric cavity
    large sac that aids in digestion and nutrient distribution
  33. statocycst/statolith
    gravity sensor for cniderians
  34. perisarc
    • "around coat"
    • goes around stolon and stalks
  35. athecate
    when perisarc only covers stalk
  36. hydrotheca
    area where perisarc covers tentacles
  37. dactylozooids
    • defence zooids in hydroids
    • have nematocysts
  38. rhopalium
    • scyphozoa
    • bundles of sensory and nervous tissues on top of medusa bell
  39. gastric filaments
    • Scyphozoa
    • endoderm that bears nematoysts
  40. basal disk
    area where anthozoa attaches to a substrate
  41. acontial filaments
    • Anthozoa
    • filaments that hang free in gastrovascular cavity
  42. Hydrozoa larva
    planula
  43. Scyphozoa larva cycle
    • Planula
    • budding scyphistoma
    • polyp
    • ephyra
    • medusa
  44. Anthazoa larva
    planula

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