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Mollusca

A preliminary correlation between the plio-pleistocene malacofaunas of the Jordan Valley (Israel) and the Orontes Valley (Syria)

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Pages 69-112 | Published online: 28 Feb 2013
 

Abstract

Extensive collections of freshwater-molluscs were made from the type-localities of plio-pleistocene sediments in the Jordan Valley by the Hebrew University of Jerusalem. We were able to compare them with fossils of the known and almost synchronous mollusc-bearing sediments of the Orontes Rift Valley in Syria. Significant differences were found between these faunas. 8 new species, 4 new subspecies and most of the previously described Prosobranch-species are known only from the Jordan sediments. Both faunas diverged at the latest after the Basalt upwelling in the upper Pliocene, or even earlier.

Kurzfassung

Umfangreiche, durch die Hebrew University of Jerusalem stratigraphisch entnommene Fossilproben aus den Typlokalitäten plio- pleistozäner Sedimente im Jordantal wurden auf ihren Mollusken-Inhalt untersucht. Sie ermöglichen einen Vergleich mit den bekannten, annähernd gleichaltrigen Molluskenfaunen des Orontes-Grabens in Syrien. Als Resultat ergaben sich erhebliche Unterschiede zwischen beiden Faunengebieten. 8 neue Arten, 4 neue Unterarten sowie der Großteil aller bereits früher benannten Prosobranchier-Arten sind nur aus dem Jordangraben bekannt. Spätestens seit dem Basalterguß im oberen Pliozän, wahrscheinlich bereits früher, divergierten beide Faunen.

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