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
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1987
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University of Hawaii Press
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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
of Panama, one would expect that these two species of Euraphia 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.
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Laguna JE. 1987. 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. Pac Sci 41: 132-140.
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