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Marine reptiles from the Jurassic/Cretaceous transition at the High Andes, Mendoza, Argentina
Fernandez, M.S.; Herrera, Y.; Vennari, V.V.; Campos, L.; de la Fuente, M.; Talevi, M.; Aguirre-Urreta, B. (2019). Marine reptiles from the Jurassic/Cretaceous transition at the High Andes, Mendoza, Argentina. J. South Am. Earth Sci. 92: 658-673. https://dx.doi.org/10.1016/j.jsames.2019.03.013
In: Journal of South American Earth Sciences. Elsevier: Oxford; New York; . ISSN 0895-9811; e-ISSN 1873-0647
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Author keywords
    Ichthyosaurs; Metriorhynchids; Turtles; Biostratigraphy; Vaca Muerta Formation; Tithonian-Berriasian
Auteurs  Top 
  • Fernandez, M.S.
  • Herrera, Y.
  • Vennari, V.V.
  • Campos, L.
  • de la Fuente, M.
  • Talevi, M.
  • Aguirre-Urreta, B.
Abstract
    Upper Jurassic and Lower Cretaceous deposits of the Vaca Muerta Formation (Neuquen Basin, central-west Argentina) have yielded abundant marine reptile remains. Most of them correspond to faunal assemblages recovered from outcrops in the Neuquen Province (Argentina). Herein we report two new marine reptile-bearing localities documenting the Tithonian-Berriasian transition at the High Andes (Mendoza Province, Argentina). Marine reptiles have been mapped and/or collected in connection with an accurate ammonoid-based biostratigraphic control. All the skeletons have been found preserved in, or associated with, calcareous nodules. At both localities they are frequent in beds assigned to the upper Tithonian Corongoceras alternans ammonite Zone (Microcanthum to "Durangites" Standard Zones), and are rare to common in beds assigned to the upper Tithonian-lower Berriasian Substeueroceras koeneni Zone ("Durangites" to Jacobi Standard Zones). Newly discovered assemblages depict a similar pattern characterized by the lack of plesiosaurs (plesiosauroids and pliosaurids), and by the abundance of mesoconsumers represented by ophthalmosaurids and metriorhynchine metriorhynchids. Macropredator geosaurines, apex metriorhynchids predators, and thalassochelydian turtles are rare components of these assemblages.
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