{"refrec":{"BRefID":234072,"RR":"<b>Nolf, D.; Brzobohaty, R.</b> (1994). Fish otoliths from the Late Oligocene (Eger and Kiscell Formations) in the Eger area (northeastern Hungary). <i>Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 64</i>: 225-252","BEntID":225756,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":null,"RefStringPartII":". <i>Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 64</i>: 225-252","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Nolf, D.; Brzobohaty, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Nolf, D.; Brzobohaty, R.","Englishabstract":"Otoliths collected from the Late Oligocene of the Eger area revealed the presence of 52 teleost taxa from subtropical to warm temperate waters. Two successive faunas, which have only three species in common, are identified: the Kiscell Clay fauna, comprising 30 taxa, and the Eger Formation fauna, comprising 25 taxa. Although both belong to distinct stratigraphic horizons, the differences are entirely due to ecological factors. The Kiscell Clay provided an association of deepwater fishes, quantitatively very rich in otoliths of mesopelagic fishes, while the Eger association reflects a continental shelf fauna, in which three distinct assemblages corresponding to the progressive shallowing of the environment can be distinguished. The Late Oligocene teleost fauna from the Eger area shows a striking resemblance with the one from the Late Oligocene (Zone NP25) Saint-Etienne d'Orthe Clay in the Aquitaine Basin, SW France. Notwithstanding the geographic distance separating both areas, 12 of the 20 nominal species (60%) recorded from the Eger area are also known from Saint-Etienne d'Orthe. Species from both the Eger and the Kiscell Formations are found together in the Saint-Etienne-d'Orthe association. This can be explained by the depositional environment of the Saint-Etienne-d'Orthe Clay (deep neritic to uppermost slope), the depth of which was intermediate between that of the two Hungarian Formations. It confirms that the marked difference between the Kiscell and Eger otolith associations is ecologically conditioned. Another very important conclusion is that the Late Oligocene (nannoplankton Zones NP 24 and 25) ichthyofauna must have been quite homogeneous from the Paratethys to the Eastern Atlantic. In the neritic component of the fauna studied, the ambassids, sillaginids and leiognatids have an exclusively Indo-West-Pacific Recent distribution (except for some recent Mediterranean intruders through the Suez Canal). Among the deeper dwelling neritic taxa and oceanic fishes, 10 genera or families are not represented in the Recent Mediterranean fauna. This proves that in the Late Oligocene, even marginal deep dependences of this basin were inhabited by more typical oceanic faunas than today. All these data fit very well with the paleogeographic reconstruction of the Late Oligocene Mediterranean realm by RÖGL & STEININGER, which postulates a Paratethys without direct link with the North Sea Basin, but with an open connection with an Indo-Pacific-Atlantic seaway across the Mediterranean and a pronounced circum-equatorial current system. Six new species are introduced: <i>Rhechias nagymarosyi</i>, <i>Opisthoproctus stellaris</i>, <i>Xenodermichthys senesi</i>, \"genus Gonostomatoideorum\" <i>aenigmaticus</i>, <i>Diaphus pristismetallis</i>, \"genus aff. <i>Raniceps\" coelorinchoides</i>.","AbstractOtherLang":"L'étude des otolithes provenant de l'Oligocène Supérieur de la région d'Eger a permis d'identifier 52 taxa de téléostéens typiques des eaux subtropicales à tempérées chaudes. Deux faunes successives, n'ayant que trois espèces en commun ont été identifiées: la faune de l'Argile de Kiscell, comptant 30 taxa, et la faune de la Formation d'Eger, comptant 25 taxa. Quoique ces deux faunes appartiennent à des horizons stratigraphiques distincts, les différences sont exclusivement dues à des facteurs écologiques. L'Argile de Kiscell a fourni une association de poissons d'eau profonde à nombreuses otolithes de poissons mésopélagiques, tandis que l'association de la Formation d'Eger reflète une faune de bordure continentale, réunissant trois assemblages qui correspondent au comblement progressif de l'aire de sédimentation. La faune téléostéenne de l'Oligocène Supérieur de la région d'Eger montre une ressemblance surprenante avec celle de l'Argile de Saint-Etienne-d'Orthe, Oligocène Supérieur (Zone NP25), dans le Bassin d'Aquitaine, Sud-Ouest de la France. Malgré la distance géographique séparant les deux régions, 12 des 20 espèces nominales (60%) de la région d'Eger sont également connues à Saint-Etienne-d'Orthe; plusieurs espèces qui en Hongrie ne sont connues que dans de la Formation de Kiscell, ou dans celle d'Eger, sont associées à Saint-Etienned'Orthe. Ceci peut être expliqué par le milieu de sédimentation de l'Argile de Saint-Etienne-d'Orthe (néritique profond ou partie supérieure de la pente continentale) qui se situait à une profondeur intermédiaire entre celles estimées pour les deux dépôts hongrois. Ceci confirme que les différences prononcées entre les associations d'otolithes des Formations de Kiscell et d'Eger sont essentiellement dues à des facteurs écologiques. Une autre conclusion importante est que l'ichthyofaune de l'Oligocène Supérieur (Zones à nannoplancton calcaire NP 24 et 25), a dû être très homogène de la Paratéthys à l'Atlantique est. Parmi les éléments néritiques de la faune étudiée, les ambassidés, sillaginidés et leiognathidés ont une répartition actuelle exclusivement indo-ouest-pacifique (sauf pour ce qui concerne quelques intrusions récentes en Méditerranée par le Canal de Suez). Parmi les taxa du domaine néritique profond et les poissons océaniques, 10 genres ou familles ne sont pas représentés dans la faune méditerranéenne actuelle. Ceci prouve qu'à l'Oligocène Supérieur, même des dépendances marginales du Bassin Méditerranéen furent habitées par une faune plus océanique qu'actuellement. Ces données s'accordent très bien avec la reconstruction paléogéographique de RÖGL & STEININGER, qui postulent a l'Oligocène Supérieur, une Paratethys sans connection avec le Bassin de la Mer du Nord, mais avec des connections vers l'Atlantique et l'Océan Indien, à travers la Méditerranée, où existait un système de courants circum-équatoriaux. Six espèces nouvelles sont décrites: <i>Rhechias nagymarosyi</i>, <i>Opisthoproctus stellaris</i>, <i>Xenodermichthys senesi</i>, \"genus Gonostomatoideorum\" <i>aenigmaticus</i>, <i>Diaphus pristismetallis</i>, \"genus aff. <i>Raniceps\" coelorinchoides</i>.","BibLvlCode":"AS","StandardTitle":"Fish otoliths from the Late Oligocene (Eger and Kiscell Formations) in the Eger area (northeastern Hungary)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"teleostean, fishes, otoliths, Late Oligocene, Hungary","OtherDescriptors":null,"Notes":null,"AnaPub":1994,"MonPub":null,"DateUpdate":"2014-08-20","DateCreate":"2014-03-11","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":234072,"PubliDate":1994,"Pagination":"225-252","XtraPublOfAnaID":null,"ISBN":null,"Volume":"64","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":64308,"SerRR":"Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. 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