High-resolution chronostratigraphy of the Cerro Barcino Formation (Patagonia): Paleobiologic implications for the mid-cretaceous dinosaur-rich fauna of South America

Krause, J. Marcelo; Ramezani, Jahandar; Umazano, Aldo M.; Pol, Diego; Carballido, José Luis; Sterli, Juliana; Puerta, Pablo; Cúneo, N. Rubén; Bellosi, Eduardo S.

doi:10.1016/j.gr.2019.10.005

Cited by 28 publications

(21 citation statements)

References 88 publications

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“…Comments. An early Aptian age is suggested for the Bardas Coloradas Member of the Los Adobes Formation (Krause et al, 2020), and this Formation underlays the Puesto La Paloma Member of the Cerro Barcino Formation. Consequently, the fauna found in Bardas Coloradas Member is older than the one from the Cerro Barcino.…”

Section: Collectors O Rauhut P Puerta (2001)mentioning

confidence: 92%

“…Charophytes and ostracods (Musacchio, 1995), and pollen (Marveggio & Llorens, 2013) from the Bardas Coloradas Member, suggest a deposition during the Barremian-Albian period. The minimum age of the Bardas Coloradas Member is early Aptian (>118 Ma) according to recent U-Pb geochronology of tuffaceous beds of the Cerro Barcino Formation (Krause et al, 2020).…”

Section: 1-12)mentioning

confidence: 99%

“…Chronostratigraphic packages: J, Jurassic; K, Cretaceous; K-Pg, Cretaceous-Paleogene; Pg, Paleogene; Ng, Neogene. References: (1) Bridge et al, 2000; (2) Aberhan et al, 2007;Barreda et al, 2012;Scasso et al, 2012;Vellekoop et al, 2017; (3) Cúneo et al, 2013a;(4) Clyde et al, 2014;(5) dozo et al, 2014;(6) Casal et al, 2015;(7) Carballido et al, 2017;(8) Krause et al, 2017;(9) del Río et al, , 2018Scasso et al, 2001;(10) Bucher et al, 2019;(11) Gosses et al, 2020;(12) Krause et al, 2020;(13) Clyde et al, 2021. Cenomanian-Turonian lapse (Ar-Ar ~96-91 Ma; Bridge et al, 2000).…”

Section: 1-12)mentioning

confidence: 99%

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Contribución a La Diversidad Del Registro Fósil De Tortugas (Testudinata) De La Provincia De Chubut (Argentina) Y Su Significado en La Comprensión De La Evolución De Las Tortugas en El Sur De Sudamérica

Sterli

Vlachos

Krause

et al. 2021

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In this work we focus on the fossil record of turtles and tortoises from the Chubut Province, in Patagonia, Argentina. This record is the richest, most diverse, the longest and continuous in the country and one of the most important in the continent. In this work, we present and study new fossils from all known clades of turtles from the province, coming from targeted field campaigns, as well as from past investigations, placed in a comprehensive and detailed chronostratigraphic context. In Chubut, more than 241 occurrences of turtles from at least 223 collection points are known, spanning from the Toarcian (Jurassic) to the Tortonian (Miocene). we manage to fill some of the gaps in the fossil record, complete the anatomical knowledge of many taxa, explore new geographical areas, and present some important highlights. Among these, the record of the oldest pan-chelid turtles indicates the significant potential of the sedimentary deposits of Chubut. Furthermore, we discuss the changes in the diversity and faunal turnovers of the various turtle clades in this region during the last 180 Ma and across important events during the Cretaceous/Paleocene and Oligocene/Miocene boundaries.

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Section: Collectors O Rauhut P Puerta (2001)mentioning

confidence: 92%

Section: 1-12)mentioning

confidence: 99%

Section: 1-12)mentioning

confidence: 99%

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Contribución a La Diversidad Del Registro Fósil De Tortugas (Testudinata) De La Provincia De Chubut (Argentina) Y Su Significado en La Comprensión De La Evolución De Las Tortugas en El Sur De Sudamérica

Sterli

Vlachos

Krause

et al. 2021

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“…The Cenomanian/Turonian turnover seems to be closely related to paleoclimatic, paleogeographic, and paleoecological variations linked with the opening of the South Atlantic Ocean, which occurred during the mid-Cretaceous (Aptian-Turonian; e.g., Schlanger & Jenkyns, 1976;Arthur et al, 1987;Elder, 1987;Hut et al, 1987;Jenkyns, 2010;Pol & Leardi, 2015;Petrizzo et al, 2021). In particular, analyzing the saurischian fossil record, a post-Turonian faunistic turnover can be recognized when mid-Cretaceous (Aptian-Turonian) faunas are compared with the post-Turonian ones (see Leanza et al, 2004;Candeiro et al, 2011;Novas et al, 2013;Candeiro, 2015;Krause et al, 2020;Ibiricu et al, 2020). Indeed, within Sauropoda, there is fossil evidence of Rebbachisauridae and both broad-toothed and narrow-toothed Titanosauriformes until the Cenomanian-Turonian interval (e.g., Canudo et al, 2018;Bellardini et al, 2022), whereas after the Turonian only the narrow-toothed titanosauriformes (all members of Titanosauria) represent the mega-herbivores saurischian fauna worldwide (e.g., Carballido et al, 2017).…”

mentioning

confidence: 99%

“…IN GONDWANA, the Cenomanian/Turonian boundary represents a crucial time-lapse for the evolutionary history of several terrestrial tetrapod lineages, representing one of the latest faunistic replacement of Mesozoic (see Apesteguía, 2002;Leanza et al, 2004). Indeed, it precedes the final establishment of typical Late Cretaceous reptile lineages, before the extinction of non-avian dinosaurs at the Cretaceous/ Paleogene boundary (Coria & Salgado, 2005;Novas et al, 2005Novas et al, , 2013; Krause et al, 2020). The Cenomanian/Turonian turnover seems to be closely related to paleoclimatic, paleogeographic, and paleoecological variations linked with the opening of the South Atlantic Ocean, which occurred during the mid-Cretaceous (Aptian-Turonian; e.g., Schlanger & Jenkyns, 1976;Arthur et al, 1987;Elder, 1987;Hut et al, 1987;Jenkyns, 2010;Pol & Leardi, 2015;Petrizzo et al, 2021).…”

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Nuevos Restos De Rebaquisáuridos Desde La Formación Huincul (Cenomaniano Medio–turoniano Temprano) Del Centro De La Cuenca Neuquina, Patagonia, Argentina

Bellardini

Filippi²,

Garrido³

et al. 2022

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In the central Neuquén Basin, the Huincul Formation comprises thick successions of Upper Cretaceous fluvial deposits widely exposed at the south and north-west of Huincul High. The vertebrate fossil record from the Huincul Formation is very abundant, especially considering the saurischian dinosaurs, including several theropod (Mapusaurus, Taurovenator, Aoniraptor, Skorpiovenator, Ilokelesia, Gualicho, Overoraptor, Tralkasaurus, and Huinculsaurus) and sauropod specimens (Choconsaurus, Argentinosaurus, Cathartesaura, Limaysaurus, and the indeterminate rebbachisaurid MMCH-Pv-49). In this contribution, we describe new rebbachisaurid sauropod findings from the El Orejano locality (Neuquén Province, Argentina), where coarse sandstones outcrop referred to the lower section of the Huincul Formation. The new material includes three axial elements that we refer to Rebbachisauridae: a partial dorsal neural arch (MAU-Pv-EO-633), an incomplete dorsal vertebra (MAU-Pv-EO-634), and an almost complete caudal vertebra (MAU-Pv-EO-666). These new findings share different features with other members of that family, although show some morphological differences with other rebbachisaurid taxa, which suggest a more diversified fauna in the central Neuquén Basin than previously known, at least during the Cenomanian/Turonian interval. This record from the new fossiliferous locality of El Orejano allows us to improve our knowledge about the morphological diversity of the Rebbachisauridae during the early Late Cretaceous. Furthermore, it represents one of the most modern records of the family, adding new information on the last stages of the evolutionary history of rebbachisaurids.

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Elemgasem nubilus: a new brachyrostran abelisaurid (Theropoda, Ceratosauria) from the Portezuelo Formation (Upper Cretaceous) of Patagonia, Argentina

Baiano

Pol

Bellardini

et al. 2022

Papers in Palaeontology

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Abelisaurids are medium-large-sized theropod dinosaurs that were predominant in the carnivorous fauna during the Late Cretaceous of Gondwana. These predators are abundant in the Cretaceous fossil strata of Patagonia, which yield the best record for this group. In the Late Cretaceous, abelisaurids appear in almost all regions of Gondwana and in all stages, except for the Coniacian, in which they are globally unknown. Here we describe a new abelisaurid, Elemgasem nubilus gen. et sp. nov., from the Portezuelo Formation (Turonian-Coniacian), Patagonia, Argentina. The palaeohistology of the appendicular bones of Elemgasem shows that the holotype was a subadult individual, but had achieved sexual maturity. This taxon is based on several axial and appendicular elements, and is diagnosed by the presence of a marked pattern of rugosity on the lateral surface of the fibula and a dorsoventrally deep lateral wall of the calcaneum. Moreover, the posterior caudal vertebrae have a morphology slightly different from any other abelisaurid. Elemgasem nubilus is recovered as an unstable taxon within Brachyrostra, given that it was recovered as sister taxon of Furileusauria or in several positions within this clade. Despite the problematic phylogenetic relationships of Elemgasem nubilus, it is important because it is the first abelisaurid from the Turonian-Coniacian interval and it increases the diversity of this theropod family at a time of marked turnover in the tetrapod fauna of South America, global climate change, and mass extinction events recorded worldwide in the marine realm.

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High-resolution chronostratigraphy of the Cerro Barcino Formation (Patagonia): Paleobiologic implications for the mid-cretaceous dinosaur-rich fauna of South America

Cited by 28 publications

References 88 publications

Contribución a La Diversidad Del Registro Fósil De Tortugas (Testudinata) De La Provincia De Chubut (Argentina) Y Su Significado en La Comprensión De La Evolución De Las Tortugas en El Sur De Sudamérica

Contribución a La Diversidad Del Registro Fósil De Tortugas (Testudinata) De La Provincia De Chubut (Argentina) Y Su Significado en La Comprensión De La Evolución De Las Tortugas en El Sur De Sudamérica

Nuevos Restos De Rebaquisáuridos Desde La Formación Huincul (Cenomaniano Medio–turoniano Temprano) Del Centro De La Cuenca Neuquina, Patagonia, Argentina

Elemgasem nubilus: a new brachyrostran abelisaurid (Theropoda, Ceratosauria) from the Portezuelo Formation (Upper Cretaceous) of Patagonia, Argentina

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