Ch 33 - Invertebrates (PART 2 of 2)(1 slide per page)-1

Class crinoidea sea liles feather stars arms many w

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Unformatted text preview: reporite on bottom side near mouth/anus • Suspension feeders, predators, & scavengers 136 2. Class Ophiuroidea: brittle stars • Organs NOT in arms 137 3. Class Crinoidea: sea liles & feather stars • Feather-like arms • Complete digestive system w/ upward-facing mouth and anus All are suspension feeders (eat plankton) “lily-like” 138 3. Class Crinoidea: sea liles & feather stars •Arms (many) •w/ tube feet, feeding groove & cilia •Calyx •organs, mouth, anus •Stalk • sometimes muscular http://animaldiversity.ummz.umich.edu/site/resources/biodidac/crin001.gif/medium.jpg 139 3. Class Crinoidea Endoskeleton Ossicles in all parts Arms: joined by muscles Calyx: fused Stem: joined by ligaments or muscles 140 3. Class Crinoidea Feeding •Arms w/ tube feet •Mucous secretion •Move food to feeding grooves •Cilia pass to mouth 141 4. Class Echinoidea: sea urchins & sand dollars “spine-like” • No arms • Complete digestive system w/ downward-facing mouth and upward-facing anus • Ossicles fused into a “test” Herbivore Substrate feeder 142 4. Class Echinoidea: sea urchins & sand dollars • In urchins tube feet stick out between spines “spine-like” 143 4. Class Echinoidea: sea urchins & sand dollars • Mouth surrounded by specialized feeding apparatus known as “Aristotle’s lantern” • Has 5 teeth (replaced regularly) http://virtual.yosemite.cc.ca.us/randerson/Marine%20Invertebrates/Ari...
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This note was uploaded on 02/12/2014 for the course BIOLOGY 2011 taught by Professor Woo during the Fall '10 term at University of Central Florida.

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