BIOL 3454 1nd Edition Lecture 11I. Class Scyphozoaa. Most of the jellyfish b. No velum, margin of mbrella scalloped with lappets (notches Rhopalia (sensory centers) between the lappetsc. Posses a nerve net d. Lots of nematocysts for prey capturee. 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 II. Aurelia anatomya.III. Aurelia life cycle a. Sexes separate, fertilization internal ingastric pouch of femaleb. Zygotes develop in seawaterc. Larvae becomes a scyhistoma, a hydralike form that bud to produce clonesd. Strobilation – the process by which Aurelia makes saucerlike buds called ephyrae and becomes a strobilai. Ephyrae get loose and become mature jellyfishii.IV. Cassiopeia – upside down jellyfisha. 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.c. Characteristic oral arm structure d. Frilly oral arms filter feede. Also contain energy producing symbiotic algae (zooxanthellae)V. Class Staurozoa a. No medusa phaseb. Polyp body is stalked c. 8 arms d. Nonswimming planula develops directly into a polypVI. Class Cubozoa a. Medusa predominant b. Polyp inconspicuous or unknown c. Base of each tentacle flattened called a pedaliumd. Rhopalia present, each with 6 eyes e. Subumbrella edge turns inward to forma velariumf. Strong swimmers and voracious predators i. Some dangerous to humans ii. Sea wasp in
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