Examinando por Autor "Scherzinger, Armin"

Mostrando 1 - 8 de 8
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    A new species of the ammonite genus Neochetoceras Spath (Oppeliidae) from the Hybonotum Zone (Lower Tithonian) of Southern Germany, with comments on the phylogeny of the genus
    (Instituto de Fisiografía y Geología. Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario, 2015-09) Scherzinger, Armin; Parent, Horacio; Schweigert, Günter
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    ÍtemAcceso Abierto
    A new species of the ammonite genus Physodoceras Hyatt (Aspidoceratidae) from the Hybonotum Zone (Lower Tithonian) of Southern Germany, with comments on the phylogeny of the genus
    (Instituto de Fisiografía y Geología. Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario, 2018-12-20) Scherzinger, Armin; Parent, Horacio; Schweigert, Günter
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    ÍtemAcceso Abierto
    Ammonites of the Middle Tithonian Internispinosum Zone from Barda Negra, southern Neuquén-Mendoza Basin, Argentina
    (Instituto de Fisiografía y Geología, 2007) Parent, Horacio; Scherzinger, Armin; Schweigert, Günter; Capello, Oscar D.
    An ammonite fauna from an isolated outcrop of the Upper Jurassic Vaca Muerta Formation is described from Barda Negra in the southern part of the Neuquén-Mendoza Basin. It comprises several macroconch specimens of the species Aspidoceras cf. euomphalum Steuer, 1897 besides macroconchs and microconchs of Windhauseniceras internispinosum (Krantz, 1926), the index species of the Andean Middle Tithonian Internispinosum Zone. Morphological and taxonomic relationships of the studied aspidoceratids with previously described species and the sexual dimorphism in W. internispinosum are discussed.
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    ÍtemAcceso Abierto
    Andean Lower Tithonian (Picunleufuense Zone) ammonites and aptychus from Estancia Maria Juana, Southern Neuquén Basin, Argentina
    (Instituto de Fisiografía y Geología. Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario, 2013-12-27) Parent, Horacio; Garrido, Alberto C.; Schweigert, Günter; Scherzinger, Armin
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    ÍtemAcceso Abierto
    Pasottia, a new genus of Tithonian oppeliid ammonites (Late Jurassic, Ammonoidea: Haploceratoidea)
    (Instituto de Fisiografía y Geología, 2008-12) Parent, Horacio; Schweigert, Günter; Scherzinger, Armin; Enay, Raymond
    Pasottia, un nuevo género de amonites tithonianos de la famlia Oppeliidae (Jurásico Tardío, Ammonoidea: Haploceratoidea). Extensos muestreos de la fauna de amonites tithonianos de la Cuenca Neuquén-Mendoza realizados en los últimos años han puesto en evidencia la ocurrencia de un nuevo género descripto como Pasottia n. gen., con Pasottia andina n. sp. como su especie tipo. El holotipo proviene de la Zona Zitteli del Tithoniano Medio de La Amarga, localidad del extremo sur de la cuenca. P. andina n. sp. ha sido registrada en su localidad tipo y en Cerro Lotena, confinada en un horizonte de la parte media de la Zona Zitteli. Pasottia n. gen. es incluído en la subfamilia Taramelliceratinae sobre la base de: (1) la característica microconcha que posee un marcado surco con una fila de estructuras linguiformes en la mitad del flanco de la última vuelta del fragmócono y la cámara habitacional, la cual es geniculada, y (2) ambos dimorfos sexuales poseen un vientre estrecho y redondeado, sin quilla. Sobre la base del conjunto de amonites asociados en el horizonte tipo se concluye que éste es de edad Zona Semiforme del estándar primario interenacional.
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    ÍtemAcceso Abierto
    The Tithonian-Berriasian ammonite fauna and stratigraphy of Arroyo Cieneguita, Neuquén-Mendoza Basin, Argentina
    (Instituto de Fisiografía y Geología. Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario, 2011-07-01) Parent, Horacio; Scherzinger, Armin; Schweigert, Günter
    In this paper we present the results of the revision of the ammonite fauna and the stratigraphy of the Tithonian- Berriasian succession of Arroyo Cieneguita (Mendoza, Argentina), based on new material recently collected and the collections studied by Steuer, Gerth and Krantz. The studied succession belongs to the Vaca Muerta Formation which overlies the Tordillo Formation in concordance. The lower part of the succession consists of marls and shales, being rich in ammonites, bivalves and gastropods; the middle (shales) and upper (limestones and marls) parts contain almost exclusively ammonites. The majority of the species described by Steuer and a part of those studied by Gerth and Krantz have been revised and several type specimens designated and refigured. Ammonites of the Haploceratoidea have been only recorded in the interval Picunleufuense - lower Internispinosum zones including the genera Pseudolissoceras, Cieneguiticeras, Pasottia, ?Parastreblites, ?Uhligites and ?Semiformiceras. The Catutosphinctes and Choicensisphinctes genera are recorded from the Picunleufuense Zone (lowermost Tithonian) up to the Koeneni Zone (uppermost Tithonian). Two new genera of the Lithacoceratinae (family Ataxiocertidae) are introduced: Krantziceras n. gen. and Platydiscus n. gen. Remaining Ataxioceratid genera recorded are: Lithacoceras, Mazatepites and probably Malagasites (a doubtful specimen). The Berriasellinae are represented by Parodontoceras, Substeueroceras, Blanfordiceras and Chigaroceras (a single specimen), and the Spiticeratinae by Spiticeras and Groebericeras. The Himalayitidae include species of Steueria n. gen., Micracanthoceras, Windhauseniceras, Corongoceras and Himalayites (a single specimen). The Aspidoceratinae are well represented by Aspidoceras, Toulisphinctes, Pseudhimalayites and Physodoceras, although as typical in the basin, the material is scarce. The chronostratigraphic classification and time-correlation of the studied succession are based, as usual, on the biostratigraphy of its ammonites. In some levels occur associations which enable the definition of ammonite (bio-)horizons, useful biostratigraphic units consisting of beds with a characteristic fauna. Eight new ammonite horizons are introduced, from below: cf. erinoides hz. (Zitteli Z.), falculatum hz. (Proximus Z.), vetustum hz., bardense hz. (Alternans Z.), striolatus hz. (Koeneni Z.), compressum hz., noduliferum hz. (Noduliferum Z.) and transgrediens hz. (Damesi Z.). The succession of these horizons and other ones already defined in previous papers, are associated to the Andean chronostratigraphic scale which is then used for fine time-correlation between sections of several localities of the Neuquén-Mendoza Basin where a number of them could be recognized by means of their characteristic ammonite assemblages. The vetustum hz., Alternans Zone, upper Tithonian is recognized in Madagascar and probably in parts of Antarctica.
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    ÍtemAcceso Abierto
    The Tithonian-Lower Valanginian stratigraphy and ammonite fauna of the Vaca Muerta Formation in Pampa Tril, Neuquén Basin, Argentina
    (Instituto de Fisiografía y Geología. Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario, 2015-11-21) Parent, Horacio; Garrido, Alberto C.; Scherzinger, Armin; Schweigert, Günter; Fözy, Itzván
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    Tithonian (Internispinosum Zone) ammonites from Cordón de Cuchillo Cura, Neuquén Basin, Argentina
    (Instituto de Fisiografía y Geología. Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario, 2018-10-26) Parent, Horacio; Garrido, Alberto C.; Scherzinger, Armin; Schweigert, Günter