1. Radiate Phyla II
Chapter 7

2. Class Cubozoa: Sea wasps and box jellyfish About 3 dozen species almost all are tropical.
medusa & polyp body forms
thick mesoglea

4. Unfrilled bell margin drawn inward to form a velum-like structure.

5. Cubozoan Sensory Structures
Sensory structures called rhopalia.

6. Cubozoan Sensory Structures
cubozoans have eyes.
The larger regions actually contain lenses, corneas, and retinas.

7. Nematocysts are concentrated in rings on the tentacles of cubozoans.

11. Predominantly two species responsible
The Box Jelly Chironex fleckeri
Irukandji Carukia barnesi

12. The Box Jelly Chironex fleckeri

13. The Box Jelly Chironex fleckeri

14. Box Jelly Chironex fleckeri
Box jellies or sea wasps are thought to be responsible for about deaths over the past 50 years in Australia.
The tentacles can be up to 10 feet long.
In Australia twice as many people die annually from box jellies as from sharks.
The toxin of most cubomedusan jellies is more potent than cobra venom.

15. Irukandji Carukia barnesi
Stings have been recorded from Australia, and a similar syndrome has been described elsewhere in the Pacific.
Every summer, more than sixty people are hospitalized with this potentially fatal syndrome.

16. Cubozoan Life Cycle
Similar to jellyfish.

17. Class Anthozoa
polyp body form ONLY
all marine

18. Class Anthozoa some are colonial
 colonies are formed of individual zooids
some are solitary

19. Class Anthozoa- life cycle
Sexual reproduction
sperm
egg
larva

20. Class Anthozoa- life cycle
asexual reproduction
fission
pedal laceration
fission

21. Class Anthozoa
Sea anemones

25. Class Anthozoa
Soft Corals
                                                 
Sea pen
Sea pansy

27. Class Anthozoa
Stony Corals
                            
                                                 

28. The Corals Make up the largest group of Anthozoa Colonial
Secrete skeleton of calcium carbonate
Cup shaped
Polyp is fixed to this

29. Theca
Sclerosepta

32. Ctenophores comb jellies
Solitary
All marine
Sexual reproduction

33. Ctenes of comb row

34. Feeding Feed with specialized cells called colloblasts or lasso cells.
A few species have cnidocytes.

35. Colloblasts on ctenophore tentacles

36. colloblasts

37. Kleptocnidae

38. Ph. Ctenophora Cl. Nuda Cl. Tentaculata ctene row Deiopea kaloktenota
Pleurobrachia sp.
Coeloplana sp.
Cestus sp.

39. Bioluminescence Produce light using photocytes
Located in the walls of the digestive system
Appears that light is coming from comb rows
NOT all produce luminescence

40. Big Picture The radiate phyla are the first (i.e. basal) Metazoans
Most have a dimorphic life cycle
Specialized structures the Cnidocytes
Some such as corals secrete a calcium carbonate base
Ctenophores produce bioluminescence