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Reconstruction of Oligocene and Neogene freshwater fish faunas - an actualistic study on cypriniform otoliths

100%

Schulz-Mirbach T., Reichenbacher B.

Acta Palaeontologica Polonica

2006

tom 51

nr 2

Fossil utricular otoliths (= lapilli) from cypriniform fishes have long been recorded from European Oligocene and Neogene freshwater and oligohaline sediments. Until now, their determination was limited to the family level owing to the lack of morphological investigations on lapilli of Recent cypriniforms. The present study introduces a terminology for the lapillus morphology that is based on the lapilli of 134 specimens of 20 cyprinid and one balitorid species. It is demonstrated that the lapillus has valuable characters for taxonomic classification. As a result, fossil lapilli from Oligocene and Miocene continental deposits from the western Mediterranean, the Swiss and the South German Molasse Basin, the Mainz Basin, and additionally from Anatolia could be determined. Nine species were identified: aff. Abramis sp. vel aff. Alburnus sp., aff. Alburnoides sp., aff. Barbus sp., cf. Leuciscussp., Palaeoleuciscus sp., Palaeotinca moeddeni sp. nov., Palaeotinca sp. 1, aff. Phoxinus sp., and aff. Rutilus sp. vel aff. Scardinius sp. Our study includes the oldest record of a Phoxinus−related and a Palaeotinca species from Europe. Additionally, aff. Abramis sp. vel aff. Alburnus sp. and aff. Alburnoides have been identified as fossils for the first time. The determination of the fossil lapilli has been supported by means of pharyngeal teeth, with the exception of aff. Abramis sp. vel aff. Alburnus sp., whose lapilli were found together with pharyngeal teeth of Palaeocarassius sp. It is suggested that these so−called Palaeocarassius pharyngeal teeth do not belong to an ancestor of the Carassiuslineage, but to a forerunner of the Abramis or Alburnuslineage. Our results support the previously described turnover in the Paratethys freshwater fish fauna about 17–18 Ma ago, when Palaeotinca spp. became extinct and the first appearance of Palaeoleuciscussp. and Palaeocarassiussp. (= aff. Abramissp. vel aff. Alburnus sp.) occurred. The Oligocene and Miocene cypriniform fishes did not evolve any provincialism from southern France throughout the Molasse Basin to the Mainz Basin.

A new species of silverside from the Late Miocene of NW Iran

71%

Carnevale G., Haghfarshi E., Abbasi S., Alimohammadian H., Reichenbacher B.

Acta Palaeontologica Polonica

2011

tom 56

nr 4

The genus Atherina (Atheriniformes, Teleostei) includes five extant brackish and marine species that inhabit the eastern Atlantic, Mediterranean Sea, Black Sea, and Caspian Sea. Several fossil species are known from the Mediterranean and Paratethyan basins. Here we describe a new fossil species, Atherina atropatiensis sp. nov., from Upper Miocene deposits of the intramontane Tabriz Basin in NW Iran, based on well−preserved, articulated skeletons from the Lignite Beds at Baghmisheh−Marzdaran, near Tabriz. The new fossil species closely resembles the Recent A. boyeri, the only extant species of Atherina in the Caspian Sea, from which it can be distinguished by the different relative development of the ascending and alveolar processes of the premaxilla, and the mutual relationship between pleural ribs and dorsolateral process of the basipterygium. The systematic and zoogeographic affinities of A. atropatiensis indicate that the Lignite Beds of the Tabriz Basin were deposited in a euryhaline environment and that a connection between the intramontane Tabriz Basin and the Eastern Paratethys (Southern Caspian Sea) once existed.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

2 Reichenbacher B.

1 Abbasi S.

1 Alimohammadian H.

1 Carnevale G.

1 Haghfarshi E.

1 Schulz-Mirbach T.

1 2011

1 2006

Wyniki wyszukiwania

Reconstruction of Oligocene and Neogene freshwater fish faunas - an actualistic study on cypriniform otoliths

A new species of silverside from the Late Miocene of NW Iran