BIOL 3454 1nd Edition Lecture 11 I II III IV Class Scyphozoa a Most of the jellyfish b No velum margin of mbrella scalloped with lappets notches Rhopalia sensory centers between the lappets c Posses a nerve net d Lots of nematocysts for prey capture e Mouth on sumbrellar side f Manubrium with four frilly oral arms g 4 gastric ouches each with a hanging gastric filament h Radial canals from each pouch lead to a ring canal Aurelia anatomy a Aurelia life cycle a Sexes separate fertilization internal ingastric pouch of female b Zygotes develop in seawater c Larvae becomes a scyhistoma a hydralike form that bud to produce clones d Strobilation the process by which Aurelia makes saucerlike buds called ephyrae and becomes a strobila i Ephyrae get loose and become mature jellyfish ii Cassiopeia upside down jellyfish a No tentacles on umbrella margin b High branched mouth These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute V VI c Characteristic oral arm structure d Frilly oral arms filter feed e Also contain energy producing symbiotic algae zooxanthellae Class Staurozoa a No medusa phase b Polyp body is stalked c 8 arms d Nonswimming planula develops directly into a polyp Class Cubozoa a Medusa predominant b Polyp inconspicuous or unknown c Base of each tentacle flattened called a pedalium d Rhopalia present each with 6 eyes e Subumbrella edge turns inward to forma velarium f Strong swimmers and voracious predators i Some dangerous to humans ii Sea wasp in Australia
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