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Revista chilena de historia natural

Print version ISSN 0716-078X


CASTILLA, JUAN C  and  GUINEZ, RICARDO. Disjoint geographical distribution of intertidal and nearshore benthic invertebrates in the Southern Hemisphere. Rev. chil. hist. nat. [online]. 2000, vol.73, n.4, pp.585-603. ISSN 0716-078X.

Biogeographical explanations for the extant and paleo disjoint geographical distribution in the southern hemisphere of five species of nearshore marine benthic invertebrates: Gaimardia trapesina, Ostrea chilensis, Pyura stolonifera taxonomic complex, Aulacomya ater and Concholepas concholepas, showing distinctive reproductive strategies and early life history characteristics are reviewed and analyzed. Through the use of published and new information we contrasted the following hypotheses: a) vicariance-historical process, b) epiplanktonic larval dispersal, c) juvenile/adult dispersal through rafting and d) planned or accidental anthropogenic dispersal mechanisms. The juvenile/adult transoceanic dispersal hypothesis by rafting was the only one impossible to be rejected for the species analyzed. The implication and future direction for research in this area are discussed

Keywords : paleobiogeography; vicariance; larval dispersal; rafting; anthropogenic dispersal; bivalves; gastropods; tunicates; invertebrates; nearshore; southern hemisphere.

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