The first record of Late Ordovician ostracods from Iran comes from the lowermost part of the Shirgesht Formation east of Anarak, central Iran. The fauna comprises more than 40 species of beyrichiocopes and podocopes with a total of 17 new species and one new subspecies. Among the beyrichiocopes the Binodicopa are represented with 10 species, the Palaeocopa occur with eight species. The Anarak fauna shows relations to both allochthonous and autochthonous sediments from Thuringia as well as to Baltica with the relations being closest to the fauna of certain calcareous clasts of the glaciomarine Lederschiefer of Thuringia. The clasts have been considered as pebbles or boulders from debris flows (Schallreuter & Hinz-Schallreuter 1998), but their origin remained unclear until now. Investigation of the Anarak ostracods proved to be most significant in terms of clarifying this question. The close relations between both faunas suggest that the Thuringian clasts came from the vicinity of Gondwanian Iran.

Late Ordovician Ostracoda from Iran and their significance for palaeogeographical reconstructions / Schallreuter, R.; HINZ SCHALLREUTER, I.; Balini, M.; Ferretti, Annalisa. - In: ZEITSCHRIFT FUER GEOLOGISCHE WISSENSCHAFTEN. - ISSN 0303-4534. - STAMPA. - 34(5):(2006), pp. 293-345.

Late Ordovician Ostracoda from Iran and their significance for palaeogeographical reconstructions

FERRETTI, Annalisa
2006

Abstract

The first record of Late Ordovician ostracods from Iran comes from the lowermost part of the Shirgesht Formation east of Anarak, central Iran. The fauna comprises more than 40 species of beyrichiocopes and podocopes with a total of 17 new species and one new subspecies. Among the beyrichiocopes the Binodicopa are represented with 10 species, the Palaeocopa occur with eight species. The Anarak fauna shows relations to both allochthonous and autochthonous sediments from Thuringia as well as to Baltica with the relations being closest to the fauna of certain calcareous clasts of the glaciomarine Lederschiefer of Thuringia. The clasts have been considered as pebbles or boulders from debris flows (Schallreuter & Hinz-Schallreuter 1998), but their origin remained unclear until now. Investigation of the Anarak ostracods proved to be most significant in terms of clarifying this question. The close relations between both faunas suggest that the Thuringian clasts came from the vicinity of Gondwanian Iran.
34(5)
293
345
Late Ordovician Ostracoda from Iran and their significance for palaeogeographical reconstructions / Schallreuter, R.; HINZ SCHALLREUTER, I.; Balini, M.; Ferretti, Annalisa. - In: ZEITSCHRIFT FUER GEOLOGISCHE WISSENSCHAFTEN. - ISSN 0303-4534. - STAMPA. - 34(5):(2006), pp. 293-345.
Schallreuter, R.; HINZ SCHALLREUTER, I.; Balini, M.; Ferretti, Annalisa
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/584381
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