Term
Class Scyphozoa
Lifestyle? |
|
Definition
| All marine. Gonochoristic (dioecious: sexes are separate). fertilized egg -develop> planula larva -settlement> scyphistoma (polyp form, benthic) -time> strobilation -> ephyrae (swimming form) -time> adult scyphozoan (medusa form) -gametes> start over. |
|
|
Term
|
Definition
| Swim using mesoglea. Jet propulsion. |
|
|
Term
Class Scyphozoa
Nutrition? |
|
Definition
| Mouth at end of manubrium. Food -> mouth -> stomach -> 4 gastric pouches -> gastrovascular canals. |
|
|
Term
Class Scyphozoa
Digestion? |
|
Definition
| Extracellular Phagocytosis: gastric pouches. Intracellular digestion. |
|
|
Term
Class Scyphozoa
Sensory Receptors? |
|
Definition
| In rhopalia along wedge of bell. Chemoreceptors. Statocysts with calcareous statolith for balance. Ocelli: simple light receptors; "shadow response." Sensory lappets in some species: mechano (touch) and chemo-reception. |
|
|
