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- W203022472 abstract "Euraphia eastropacensis sp. nov., of the tropical Eastern Pacific, is distinguished from its tropical Western Atlantic congener, E. rhizophorae, by morphological and electrophoretic evidence. Because of the apparent recent radiation of high intertidal chthamaloids and the recent closure of the Isthmus ofPanama, one would expect that these two species ofEuraphia were geminates. However, utilizing electrophoretic data, a large genetic distance value (0.95) was found, and this creates difficulties when explaining speciation between the two in terms of the molecular clock. A molecular evolutionary interpretation of the data suggests that the two species may have speciated before the closure of the Isthmus of Panama, probably as early as the Upper Miocene. THE MARINE COMMUNITIES common to the proto-Caribbean and the tropical Eastern Pacific were separated by the tectonic closure of the Isthmus of Panama 3 million years ago . Morphologically similar remnants ofthis separation were presently found on both sides of the Isthmus of Panama. Among the barna cles we have members of the genus Conopea, Megabalanus , and Euraphia (Laguna 1985). The population representing Euraphia eas tropacensis sp. nov. was first reported from the Pacific coa st of Panama by Southward and Newman (1977), who thought they both represented populations of E. rhizophorae, previously known from the tropical Western Atlantic. They noted that the morphologically similar Pacific and Caribbean populations occupy ecologically similar environments. Subsequent studies suggested that the two populations were sibling species (Newman, pers . comm . 1983; Henry, pers . comm. 1984). The purposes of this paper are to compare both populations, to describe the new tropical Eastern Pacific species, to provide electro phoretic evidence concerning their distinct-" @default.
- W203022472 created "2016-06-24" @default.
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- W203022472 date "1987-01-01" @default.
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- W203022472 title "Euraphia eastropacensis (Cirripedia, Chthamalodea), a New Species of Barnacle from the Tropical Eastern Pacific: Morphological and Electrophoretic Comparisons with Euraphia rhizophorae (deOliveira) from the Tropical Eastern Atlantic and Molecular Evolutionary Implications" @default.
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