Finding of two new radiolarian associations calibrated with ammonoids in the Vaca Muerta Formation (Late Jurassic–Early Cretaceous), Neuquén Basin, Argentina

2017 ◽  
Vol 75 ◽  
pp. 35-50 ◽  
Author(s):  
Verónica V. Vennari ◽  
Ignacio Pujana
Author(s):  
Laura Codorniú ◽  
Zulma Gasparini

ABSTRACTRecords of flying Jurassic reptiles are very scarce in the Southern Hemisphere. Upper Jurassic pterosaurs have been discovered in marine Tithonian sediments of the Vaca Muerta Formation, in the Neuquén Basin, Patagonia, Argentina. Only four specimens are known so far: the first from Arroyo Picún Leufú, and the other three from the lithographic limestones of Los Catutos. Here, we update knowledge of Late Jurassic pterosaurs from northwest Patagonia. We revise the diagnosis and description of a previously described pterodactyloid, which is named as a new genus and species, Wenupteryx uzi. This small-sized pterosaur shows affinities with Euctenochasmatia or Archaeopterodactyloidea, and represents the most complete Jurassic pterosaur so far known from the Southern Hemisphere. We also report a recent finding suggesting that the new specimen belongs to a new species of pterodactyloid pterosaur. These records show that at least three different taxa of pterosaurs coexisted in the Neuquén Basin: Herbstosaurus, Wenupteryx and a more derived pterodactyloid that represents the largest pterosaur known from the Upper Jurassic of Gondwana.


AAPG Bulletin ◽  
2011 ◽  
Vol 95 (9) ◽  
pp. 1459-1474 ◽  
Author(s):  
Diego A. Kietzmann ◽  
Javier Martín-Chivelet ◽  
Ricardo M. Palma ◽  
José López-Gómez ◽  
Marina Lescano ◽  
...  

2018 ◽  
Author(s):  
Marcelo Frydman ◽  
Andres Acevedo ◽  
Jose Miguel Castellanos ◽  
Ocdomar Casanova ◽  
Jose Hasbani ◽  
...  

2017 ◽  
Vol 36 (11) ◽  
pp. 948a1-948a10 ◽  
Author(s):  
Carlos Convers ◽  
Christian Hanitzsch ◽  
David Curia ◽  
Thomas Davis ◽  
Ali Tura

2018 ◽  
Vol XV (1) ◽  
pp. 1-26 ◽  
Author(s):  
Alberto C. GARRIDO ◽  
Horacio PARENT ◽  
Luciano BRAMBILLA

In the Cerro Mallín Quemado area (Sierra de la Vaca Muerta) the three members of the Vaca Muerta Formation (Portada Covunco, Los Catutos and Pichi Moncol) can be recognized, including the whole of the Tithonian rock-record. The ammonite fauna does not show significant differences with respect to that of the nearby locality Pampa Tril, but the record of faunal horizons is patchier. Eighteen species of ammonites were recorded through the studied sections, covering the whole of the Andean Tithonian. The current chronostratigraphic zonation of the Andean Tithonian is briefly discussed, updated and correlated with the most recent literature. From the current succession of ammonite bio-horizons previously defined in the basin, only three (picunleufuense alpha, picunleufuense beta and falculatum) were recognized definitely. Four other bio-horizons (perlaevis, erinoides, internispinosum alpha and vetustum) were recognized only tentatively, because the typical assemblages of morphotypes (morpho-species) were not clearly or completely recognized. The current regional time-correlation chart dated by the ammonite bio-horizons of the Neuquén Basin along a 70°W transect is updated with the results of the present study and additional information recently obtained from other localities.


2021 ◽  
Vol 124 ◽  
pp. 104769
Author(s):  
María del Rosario Lanz ◽  
Karem Azmy ◽  
Nora N. Cesaretti ◽  
Natalia B. Fortunatti

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