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ALLOZYMES AND mtDNA REVEAL TWO DIVERGENT LINEAGES IN ORCHESTIA CAVIMANA (AMPHIPODA: TALITRIDAE)

Valerio Ketmaier and Elvira De Matthaeis
Journal of Crustacean Biology
Vol. 30, No. 2 (May 2010), pp. 307-311
Published by: Brill on behalf of The Crustacean Society
Stable URL: http://www.jstor.org/stable/40665221
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
ALLOZYMES AND mtDNA REVEAL TWO DIVERGENT LINEAGES IN
              ORCHESTIA CAVIMANA
              (AMPHIPODA: TALITRIDAE)
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Abstract

We report on allozyme and mitochondrial DNA variation in 13 populations of the supralittoral amphipod Orchestia cavimana. The species colonizes fresh and brackish shores of Northern Africa, Near East and throughout Europe. Populations were sampled across a large part of the species range (Cyprus, Turkey, northern and southern Italy, United Kingdom and Germany), including the type locality (Cyprus). Both sets of molecular markers agree in identifying two divergent lineages. A first lineage includes populations from Cyprus and Turkey. A second genetically homogeneous lineage groups Italian, English and German populations. Genetic divergence between the two lineages is high (D Nei = 0.720 ± 0.06 for allozymes and K2P = 0.191 ± 0.001 for mitochondrial DNA) and comparable to that among morphologically distinct congeneric species reported for the same set of molecular markers.

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