Browsing by Author "1b5ebdf0-1635-4673-85c3-b5ca6d15bfcc"
Now showing items 1-17 of 17
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Legendre, Lucas J.; Rubilar Rogers, David; Musser, Grace M.; Davis, Sarah N.; Otero, Rodrigo A.; Vargas, Alexander O.; Clarke, Julia A. (Nature, 2020)Egg size and structure reflect important constraints on the reproductive and life-history characteristics of vertebrates(1). More than two-thirds of all extant amniotes lay eggs(2). During the Mesozoic era (around 250 ...
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Otero, Rodrigo A.; O'Gorman, Jose P.; Moisley, William L.; Terezow, Marianna; McKee, Joseph A. W. (Elsevier, 2018)This paper presents the detailed description of a remarkable skull and partial postcranial skeleton of a very juvenile elasmosaurid referred to Tuarangisaurus keyesi (CD 427), from the upper Campanian-lower Maastrichtian ...
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Hiller, Norton; O'Gorman, José P.; Otero, Rodrigo A. (Academic Press, 2014)A postcranial specimen from the lower Maastrichtian levels of the Conway Formation, Middle Waipara River, North Canterbury, New Zealand shows clear elasmosaurid affinities, based on the articular faces, with a ventral ...
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Bogan, Sergio; Agnolin, Federico L.; Otero, Rodrigo A.; Brisson Egli, Federico; Suárez, Mario E.; Soto Acuña, Sergio; Novas, Fernando E. (Elsevier, 2017)We describe isolated shark teeth collected from levels of the Calafate Formation at the SE coast of the Argentino Lake, Calafate city, Santa Cruz province, Argentina (Atlantic Ocean), and from the Algarrobo coast at the ...
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Otero, Rodrigo A.; Soto Acuña, Sergio; Rubilar Rogers, David (2012)An almost complete postcranial skeleton recovered from late Maastrichtian beds of central Chile, which can be confidently referred to the clade Elasmosauridae (Sauropterygia: Plesiosauroidea), is described. The material ...
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Parham, James F.; Otero, Rodrigo A.; Suárez, Mario E. (Academic Press, 2014)The taxonomic status of turtle specimens from the Upper Cretaceous (upper Maastrichtian) Quiriquina Formation of Chile is unresolved. The previously described specimens were considered either stem-cheloniid sea turtles or ...
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Otero, Rodrigo A.; O'Gorman, Jose P.; Hiller, Norton; O'Keefe, F. Robin; Fordyce, R. Ewan (Taylor & Francis, 2016-03)A fragmentary plesiosaur skull from lower Maastrichtian levels of the Conway Formation, New Zealand, is redescribed. Originally regarded as pertaining to two separate individuals, we argue that they represent a single ...
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O'Keefe, F. Robin; Otero, Rodrigo A.; Soto Acuña, Sergio; O'Gorman, Jose P.; Godfrey, Stephen J.; Chatterjee, Sankar (Taylor & Francis, 2017)This paper redescribes the holotype skull of the aristonectine elasmosaur Morturneria seymourensis from the upper Maastrichtian of Seymour Island, Antarctica. This description supports the validity of the genus Morturneria, ...
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Cryptoclidid plesiosaurs (Sauropterygia, Plesiosauria) from the Upper Jurassic of the Atacama Desert Otero, Rodrigo A.; Alarcón Muñoz, Jhonatan; Soto Acuña, Sergio; Rojas, Jennyfer; Rojas, Osvaldo; Ortiz, Héctor (Taylor and Francis, 2020)This study presents the first plesiosaurs recovered from the Jurassic of the Atacama Desert that are informative at the genus level. One specimen is represented by an articulated axial section that shows distinctive features, ...
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Le Roux, Jacobus; Puratich, Jacqueline; Amaro Mourgues, F.; Oyarzún, José Luis; Otero, Rodrigo A.; Torres, Teresa; Hervé Allamand, Francisco (2010)Very little work has been done on the stratigraphy and sedimentology of the upper Oligocene-Lower Miocene Río Baguales Formation in the Magallanes Province of southern Chile since its original definition in 1957. A detailed ...
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Yury Yáñez, Roberto E.; Otero, Rodrigo A.; Soto Acuña, Sergio; Suárez, Mario E.; Rubilar Rogers, David; Sallaberry Ayerza, Michel (2012)Paleogene records of birds in the Eastern margin of the Pacific Ocean have increased in recent years, being almost exclusively restricted to fossil Sphenisciformes (penguins). New avian remains (Ornithurae, Neornithes) ...
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Otero, Rodrigo A.; Soto Acuña, Sergio; Rojas, Jennyfer; Rojas M., Osvaldo (Elsevier, 2020)This research presents the first pliosaur remains from the Upper Jurassic of the Atacama Desert, in northern Chile. Two specimens recovered from Oxfordian levels, are represented by a fragmentary mandibular ramus and by ...
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Otero, Rodrigo A.; Sepúlveda, Patricio (Elsevier, 2020)We describe fragmentary ichthyosaur skull remains of a single individual recovered from Lower Jurassic marine strata in northern Chile. The preserved teeth display distinctive features such as a very long, robust and ...
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Otero, Rodrigo A.; Oyarzún, José Luis; Soto Acuña, Sergio; Yury Yáñez, Roberto E.; Gutierrez, Nestor M.; Le Roux, Jacobus; Torres, Teresa; Hervé Allamand, Francisco (Elsevier, 2013)This paper discusses a well-represented fossil record of cartilaginous fishes (Chondrichthyes) from southern South America. The recovered samples allow the recognition of three assemblages with chronostratigraphic and ...
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Otero, Rodrigo A.; Gutstein, Carolina Simon; Vargas, Alexander; Rubilar-Rogers, David; Yury-Yañez, Roberto; Bastías, Joaquin; Ramírez, Cristián (Paleontological Society, 2014)We present new records of chondrichthyans recovered from strata of Maastrichtian age of the López de Bertodano Formation, Seymour (=Marambio) Island, and from levels of latest Campanian age of the Santa Marta Formation, ...
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Otero, Rodrigo A.; Soto Acuña, Sergio; O'Keefe, Frank R. (Taylor & Francis, 2018)The upper Maastrichtian elasmosaurid plesiosaur Aristonectes quiriquinensis from central Chile is here redescribed following further preparation of the holotype. New cranial characters include a flattened skull with a ...
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O'Gorman, José P.; Otero, Rodrigo A.; Hiller, Norton; Simes, John; Terezow, Marianna (Academic Press, 2017)© 2016 Elsevier Ltd The systematics of elasmosaurids are not well resolved partially because of the scarcity of well-preserved skull material. Among Weddellian elasmosaurids, one exception to this is the holotype of ...