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handle: 10261/29663
[ES] Se estudian los icnofósiles procedentes de pizarras Hirnantienses (Ordovícico terminal) de dos localidades Centroibéricas (Formación Chavera) próximas a Corral de Calatrava (Ciudad Real) y El Centenillo (Jaén), así como un tercer punto en la Rama Castellana de la Cordillera Ibérica (Formación Orea), al oeste de Noguera (Teruel). El conjunto icnológico consta de Allocotichnus palmatus isp. nov., Asaphoidichnus isp., Monomorphichnus ispp., Diplichnires isp., Neonereites isp., Laevicyclus isp., Helminthopsis isp., Helicorhaphe isp., Curvolithus? isp., Didymaulichnus? isp., Cochlichnus? isp., Palaeophycus? isp., Gordia? isp., Arenicolites? isp. y Pascichnion? igen. et isp. indet. Esta icnoasociación tiene interés por aparecer en unidades correlacionables con sedimentos glaciomarinos de distribución ubicua en todo el margen nord-gondwaniense, y donde los restos fósiles son prácticamente desconocidos. Desde el punto de vista paleoicnológico, el icnogénero Helicorhaphe Ksiazkiewicz se cita por vez primera en materiales del Paleozoico Inferior, y se propone la nueva icnoespecie Allocotichnus palmatus isp. nov., interpretada como rastros de pisadas de artrópodos.
[EN] Hirnantian shales from two Central Iberian localities (Corral de Calatrava, El Centenillo: Chavera Formation) and one more in the Iberian Cordillera of NE Spain (Noguera section: Orea Formation), provided an ichnological assemblage composed of Allocotichnus palmatus isp. nov., Asaphoidichnus isp., Monomorphichnus ispp., Diplichnites isp., Neonereites isp., Laevicyclus isp., Helminthopsis isp., Helicorhaphe isp., Curvolithus? isp., Didymaulichnus? isp., Cochlichnus? isp., Palaeophycus? isp., Gordia? isp., Arenicolites? isp. and Pascichnion? igen. et isp. indet. The identified ichnofauna occurs within a largely unfossiliferous facies (claimed as "azoic" by many authors) contemporaneous with glaciomarine deposits over much of the peri-Gondwanan margin. The ichnogenus Helicorhaphe Ksiazkiewicz is reported for the first time from Lower Palaeozoic rocks. The new ichnospecies Allocotichnus palmatus isp. nov. is characterized by 3-5 pairs of crawling traces probably made by small arthropods, being the main tracks formed by 5-10 raking imprints radially arranged.
Este trabajo forma parte de los proyectos PB96-0839 de la DGES y 410 del PICG (IUGS-UNESCO). La participación del primer autor se inscribe en el marco de una Beca Externa otorgada por el Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) de la República Argentina, y en el proyecto "Dinámica faunística perigondwánica" del Programa de Cooperación Científica con Iberoamérica.
9 páginas, 2 figuras, 1 lámina.
Peer reviewed
Cordillera Ibérica, Zona Centroibérica, Iberian Cordillera, Central Iberian Zone, Spain, España, Ordovician, Hirnantian, Hirnantiense, Ichnofossils, Icnofósiles, Ordovícico
Cordillera Ibérica, Zona Centroibérica, Iberian Cordillera, Central Iberian Zone, Spain, España, Ordovician, Hirnantian, Hirnantiense, Ichnofossils, Icnofósiles, Ordovícico
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