Life 103 Week 10
Life 103 Week 10 LIFE 103
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This 2 page Class Notes was uploaded by Caroline Hurlbut on Friday April 1, 2016. The Class Notes belongs to LIFE 103 at Colorado State University taught by Jennifer L Neuwald; Tanya Anne Dewey in Fall 2016. Since its upload, it has received 13 views. For similar materials see Biology of Organisms-Animals and Plants in Biology at Colorado State University.
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Date Created: 04/01/16
Animal Taxa - Invertebrates • “Big 9” animal phyla Phylum Habitat Sessile vs Diet Motile Porifera mostly marine sessile ﬁlter feeding (sponges) Cnidaria mostly marine motile and predatory or (jellies, corals, sessile ﬁlter feeding anemones) Platyhelminthes moist habitats motile predatory or (ﬂatworms) parasitic Mollusca marine, motile and predatory (mollusks) freshwater, sessile ﬁlter feeding terrestrial detritivores Annelida marine motile and predatory (segmented freshwater sessile ﬁlter feeding worms) terrestrial detritivores sanguivores Nematoda nearly all motile parasitic and (roundworms) habitats free living Arthropoda marine, motile all feeding (insects, freshwater, styles crustaceans, terrestrial chelicerae) Echinodermata marine motile and predatory, (sea stars, sea sessile herbivores urchins, sea cucumber) Chordata nearly all motile and all feeding (vertebrates) habitats sessile styles • 3 major clades of bilateria —deuterostomia —lophotrochozoa —ecdysozoa • lophotrochozoa —based on molecular evidence —comes from 2 major groups A. lophovores: feeding morphology B. trochovore larvae: larval morphology • mollusks —groups A. gastropods B. bivalves C. cephalopods —body plans include visceral mass, foot, and mantle • annelids —have chaetae, bristle structures made of chitin —segmented body plans • ecdysozoa —members share ecdysis, process of molting to grow —based on molecular evidence arthropods • —largest and most diverse phylum—>nearly half of all animal species are arthropods —arthropod = “jointed foot” —segmented body plan including head, thorax, and abdomen —paired limbs on segments, chitinous exoskeleton —chelicerata: spiders, mites, scorpions A. chelicerae feeding appendages B. cephalothorax and abdomen C. 4 pairs of walking legs D. pedipalps (reproductive appendages) —crustacea: crabs, shrimp, barnacles, copepods, amphipods, etc. A. many pairs of walking legs B. antennae C. copepods may be most numerous animals on earth —insecta: insects/hexapods A. 3 pairs of walking legs B. antennae C. wings (true ﬂight) D. metamorphosis