Fig 1 - uploaded by Rodrigo A. Otero
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A. Map indicating location of the studied area in central Chile. B. Enlarged map of Mina Del Fierro area where the material was collected.
Context in source publication
Context 1
... studied material was recovered in the facilities of Mina Del Fierro (Del Fierro Mine), owned by Minera Río Teno S.A., located in the Cajón del Fierro locality, High Andes, west of Curicó city, Región del Maule, Chile (Fig. 1). Rocks cropping out in this area belong to the Baños del Flaco Formation (Klohn 1960). This sedimentary unit overlies the Río Damas Formation through a concordant contact. The Baños del Flaco Formation is overlain through a discordant contact by a volcanoclastic sequence known as the Brownish-Red Clastic Unit (BRCU; Charrier et al. ...
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Citations
... In South America, the oldest record of Holocephali is from the Upper Jurassic (Tithonian) of Chile, with tooth plates referred to Ischyodus towsendi and Ischyodus sp. (Otero et al. 2021). With respect to Argentina the first and also geologically oldest record of a fossil chimaeroid was reported by Florentino Ameghino (1898a), who mentioned in his Sinopsis Geológico-Paleontológica (p. ...
The aim of the present contribution is to review the fossil record of chimaeroids in Argentina. We review previous records from Argentina, including the presence of Cretaceous chimaeroids reported by Ameghino in the 19th century from the Cretaceous of Santa Cruz province. We re-analyse the species Callorhynchus crassus described from the Miocene of Patagonia by Smith Woodward and Withe in the early 20th century. It is here considered as a valid taxon within the genus Ischyodus as I. crassus nov. comb. Ichyodus dolloi is reported for the first time for the Palaeocene of Patagonia, Argentina. We report for the first time in Argentina fossils belonging to Callorhinchus from Holocene deposits in Buenos Aires province. The long temporal range of Holocephali in Argentina (from Late Cretaceous to Holocene) contrasts with the paucity of their fossil record. This indicates that the history of the clade in southern South America is far from well known.
www.zoobank.org/urn:lsid:zoobank.org:pub:2D6C9E8D-6A32-40E8-89A3-98E7D06ED6D3
La presencia de ictiosaurios es conocida en rocas del Jurásico Superior en el norte de Chile, no obstante, hasta ahora no existen identificaciones taxonómicas válidas más precisas para estos hallazgos. En este trabajo presentamos tres nuevos especímenes de ictiosaurios, recuperados desde niveles oxfordianos de
la Formación Cerro Campamento, expuestos en la localidad de Cerritos Bayos, norte de Chile. El primer espécimen corresponde a un rostro fino y una mandíbula, ambos parcialmente preservados. Lo grácil del rostro en este espécimen es un rasgo inusual entre los ictiosaurios del Jurásico Superior conocidos hasta ahora.
El segundo espécimen es un cráneo fragmentario de un ictiosaurio juvenil, pero de tamaño considerable, que conserva dientes distintivos que están típicamente presentes en los ictiosaurios del clado Ophthalmosauridae. El tercer espécimen
corresponde a un cráneo parcial de un taxón más pequeño, casi adulto, referible también a un Ophthalmosauridae. Considerando el registro Jurásico conocido de Ophthalmosauridae en el planeta, la presencia de este grupo en el norte de Chile era esperable. Sin embargo, la disparidad morfológica entre los especímenes
estudiados aquí sugiere la existencia de una diversidad ecológica de ictiosaurios
durante el Oxfordiano en el sureste de Panthalassa.
