BIO 3102 Study Guide - Eutheria, Stra, Arthropod

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11 Jul 2014
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About 30 genera are known and include: medusoids (jellyfish), e. g. medusina mawsoni and medusinites; pennatulaceans (soft corals), e. g. (jellyfish), e. g. medusina mawsoni and medusinites; pennatulaceans (soft corals), e. g. charniodiscus; annelid worms, e. g. (jellyfish), e. g. medusina mawsoni and medusinites; pennatulaceans (soft corals), e. g. charniodiscus; annelid worms, e. g. spriggina; and dickinsonia, up to 1 m long, which may have resembled an anthozoan polyp, but has been variously assigned to the annelids, medusoids, and to a phylum of its own. Medusa: the freely-swimming, umbrella- or disk-shaped gelatinous form of. Trochophore: the planktonic larva of certain invertebrates, including some molluscs and polychaete worms, having a roughly spherical body, a band of cilia, and a spinning motion. Hermaphrodite: a person or animal having both male and female sex organs or other sexual characteristics, either abnormally or (in the case of some organisms) as the natural condition. Heterokaryotic: refers to cells where two or more genetically different nuclei share one common cytoplasm.

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