Jorge Orlando CalvoNational University of Comahue | UNCo · Licenciatura en Ciencias Geológicas
Jorge Orlando Calvo
Dr.
About
136
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Introduction
Researcher in Dinosaurs and vertebrate palaeontology, I have worked mainly in Northern Patagonia describing new species that have improved the knowledge of the Cretaceous Fauna. I have also teach Geology and Paleontology at the National University of Comahue.
Additional affiliations
January 2002 - December 2011
Education
August 2003 - May 2006
August 1992 - May 1994
April 1981 - April 1986
Publications
Publications (136)
Forty years ago, L. Branisa and G. Leonardi discovered the first sauropodomorph tracks in South America during expeditions to Toro Toro (Bolivia). Since then, numerous findings, mainly in Argentina, Bolivia, and Brazil, have increased the record. The first research lines mainly covered morphological description, ichnotaxonomic identification, and b...
Upper Cretaceous outcrops, at the northeast of Barreales lake, Neuquén, Argentina, has given in the last 20 years a rich vertebrate fauna including dinosaur, reptiles, fish and plants on different sites. In this contribution, rocks of the Plottier Formation at Babilonia Site at Proyecto Dino Geopaleontological Park have given, for the first time, a...
Remains of juvenile sauropods from the Upper Cretaceous Portezuelo Formation (Neuquén Group), at Barreales Lake (Neuquén Province), are identified and described. The material include a femur (14.6 cm length) and an anterior caudal vertebra (3.1 cm length),. Their general morphology allows us to assign these bones to the Titanosauria. Although a spe...
Upper Cretaceous (Turonian–Santonian) tracksites at Barreales Lake, Neuquén Province, Argentina are described. Tracksites studied for the last 20 years on the northern and northeastern coasts of the lake mainly contain theropod and sauropod tracks preserved as either natural molds, concave epireliefs, concave hyporeliefs, or convex hyporeliefs. Sau...
This contribution contains the 3D models described and figured in the following publication: Paulina-Carabajal A and Calvo JO 2021. Re-description of the braincase of the rebbachisaurid sauropod Limaysaurus tessonei and novel endocranial information based on CT scans. Anais da Academia Brasileira de Ciências 93(Suppl. 2): e20200762
CT scans of the type braincase of Limaysaurus tessonei (MUCPv-205) allowed the first study of the endocranial cavities (brain and inner ear) for this South American taxon. Comparisons of the cranial endocast of L. tessonei with other sauropods indicate that 1) South American rebbachisaurids are more similar to each other than to Nigersaurus, and 2)...
Titanosaurs were the predominant herbivores during the Late Cretaceous, inhabiting all continents. This clade was especially diverse
in South America with some of the largest and smallest sauropod species known to date. Despite its diversity, the evolution of this clade is far
from being well-known, although some recent analyses have begun to find...
We describe a dentary of a new titanosaur sauropod, Baalsaurus mansillai, gen. et sp. nov. from the Late Cretaceous of Patagonia, Argentina. The material comes from the Portezuelo Formation, Neuquén Group. Titanosaur sauropods lower jaws are scarce and only nine taxa with dentaries have been described. There are two types of morphology in titanosau...
In Argentina, some of the most important dinosaur tracksites are found on the west coast of the Ezequiel Ramos Mexía reservoir , in the Neuquén province. In the last 30 years, more than 100 km of coastline have yielded hundreds of dinosaur tracks. The tracks are part of the Albian?-lower Cenomanian Candeleros Formation, Neuquén Group. An extensive...
The complete skull of the type specimen of Gasparinisaura cincosaltensis (MUCPv-208)-a small ornithopod from the Upper Cretaceous of Argentina-was CT scanned using a medical tomographer. The markedly small size of the skull plus the lateromedial deformation prevented the observation of the endocranial cavity in the CT data set, and further neuroana...
ABSTRACT A new azhdarchoid pterosaur from the Upper Cretaceous of Patagonia is described. The material consists of an incomplete edentulous lower jaw that was collected from the upper portion of the Portezuelo Formation (Turonian-Early Coniacian) at the Futalognko site, northwest of Neuquén city, Argentina. The overall morphology of Argentinadraco...
A new titanosaur sauropod from the Upper Cretaceous of Neuquén is described, Choconsaurus baileywillisi gen. et sp. nov. The species is represented by a nearly complete series of dorsal vertebrae as well as other parts of the skeleton. The material comes from the locality of Villa El Chocón and stratigraphically from the Huincul Formation, whose ag...
El Parque Natural Geo-Paleontológico Proyecto Dino tiene como finalidad la educación vivencial con excavaciones paleontológicas, senderos interpretativos sobre la temática geológica – paleontológica, miradores panorámicos, visita a un Centro de Interpretación, sala de Exhibición Paleontológica con servicio de guiado y un Laboratorio para la prepara...
Titanosauria is an exceptionally diverse, globally-distributed clade of sauropod dinosaurs that includes the largest known land animals. Knowledge of titanosaurian pedal structure is critical to understanding the stance and locomotion of these enormous herbivores and, by extension, gigantic terrestrial vertebrates as a whole. However, completely pr...
Los Rebbachisauridae son una familia de dinosaurios saurópodos que vivieron desde el Cretácico
inferior hasta el Cretácico superior de Sudamérica, Europa y África. La familia incluye una docena
de géneros, de los cuales la mitad (i.e. Cathartesaura, Comahuesaurus, Ketepensaurus,
Limaysaurus, Rayososaurus y Zapalasaurus) fueron registrados en Argent...
Megaraptorids are a group of predatory dinosaurs that inhabited Gondwana from Cenomanian to Santonian
times (Late Cretaceous). Phylogenetic relationships of megaraptorids have been matter of recent
debate, being alternatively interpreted as basal coelurosaurs, carcharodontosaurian allosauroids, megalosauroids,
and basal tyrannosauroids. One of the...
Although important dinosaur specimens have been recently described from Brazil, the theropod record in this county is still rather scarce, particularly from Cretaceous strata. Here we describe a complete right tibia (MCT 1783-R) from the Marilia Formation (Maastrichtian, Bauru Basin) near Peiropolis (Uberaba, Minas Gerais). This is the best theropo...
Most titanosaur dinosaurs are represented by incomplete skeletal elements lacking articulated pes. An exceptionally preserved specimen from the Late Campanian–Early Maastrichtian strata of Patagonia (Argentina) provides new data on pedal morphology and the evolutionary trends of these huge dinosaurs. This finding is one of the few articulated titan...
Although important dinosaur specimens have been recently described from Brazil, the theropod
record in this county is still rather scarce, particularly from Cretaceous strata. Here we describe a
complete right tibia (MCT 1783-R) from the Marília Formation (Maastrichtian, Bauru Basin) near
Peirópolis (Uberaba, Minas Gerais). This is the best ther...
In modern terrestrial ecosystems, the population size of large predators is low, and a similar pattern has usually been assumed for dinosaurs. However, fossil finds of monospecific, large theropod accumulations suggest that population dynamics were more complex. Here, we report two Early Cretaceous tracksites dominated by large theropod footprints,...
A NEW CRETACEOUS MESOEUCROCODYLIA FROM THE NORTH OF THE NEUQUÉN BASIN, ARGENTINA. In this contribution, a new specimen of Mesoeucrocodylia from levels attributed to the Plottier Formation (Cretaceous, Upper Coniacian) is described in the locality Yacimiento Narambuena, Rincón de los Sauces, in the north section of the Neuquén Province. The material...
A new genus and species of clupeomorph fish, Leufuichthys minimus, is described from the fluvial deposits of the Portezuelo Formation, Upper Cretaceous (Turonian–Coniacian) of the Neuquén Group, Patagonia, Argentina. It is a small-sized fish with an estimated body length up to 46 mm. Among other characters, the new species shows the following: abdo...
Titanosauria is a taxonomically and morphologically diverse clade of sauropod dinosaurs that appeared in the Middle Jurassic and radiated in the mid–Late Cretaceous; however, its intrarelationships are poorly understood. The mid-Cretaceous Argentinean sauropod Andesaurus delgadoi has repeatedly been recovered at the base of Titanosauria, and thus r...
Here we report on a new small deinonychosaurian theropod, Pamparaptor micros gen. et sp. nov., from the Late Cretaceous of Patagônia, Argentina. Pamparaptor micros exhibits a pedal structure previously unknown among South Américan deinonychosaurians. The new material provides new evidence about the morphology and taxonomic diversity of Patagônian d...
RESUMEN Se describe un nuevo saurópodo titanosauridae, Panamericansaurus schroederi de la Formación Allen, provincia del Neuquén. El holotipò fue hallado en rocas del Campaniano inferior-Maastrichtiano del NW de Patagonia. Este nuevo taxon esta fuertemente ubicado dentro de los titanosáuridos Sudamericanos Aeolosaurini. Dentro de los Aeolosaurinos...
A new hadrosauroid taxon from the Late Cretaceous Allen Formation is erected, on the basis of abundant cranial and postcranial material from the Salitral Moreno locality of the Rio Negro Province, Argentina. The new taxon is here named as Willinakaqe salitralensis gen. et sp. nov., which is characterized by having an autapomorphous premaxilla with...
The first evidence of a crocodyform on the Futalognko quarry (Neuquén, Argentina) is presented. The Portezuelo Formation has given in this site an extraordinary fossil record. The more impressive materials correspond to sauropod, theropod and ornithopod dinosaurs. However; it is also important the evidence of turtles, pterosaurus, crocodiles, fish...
Agua del Choique is a new Late Cretaceous sauropod track site from Mendoza Province, Neuquén Basin, Argentina. It is situated in the Loncoche Formation, late Campanian – early Maastrichthian in age, and is one of the youngest sauropod tracks site recorded in the world. Agua del Choique represents a lake setting and river-dominated delta deposits,...
Fossils of a predatory dinosaur provide novel information about the evolution of unenlagiines, a poorly known group of dromaeosaurid theropods from Gondwana. The new dinosaur is the largest dromaeosaurid yet discovered in the Southern Hemisphere and depicts bizarre cranial and postcranial features. Its long and low snout bears numerous, small-sized...
2 Universidad Nacional del Comahue-Centro Paleontológico Lago Barreales, Ruta prov. 51, km 65. C.C. Buenos Aires 1400. (8300) Neuquen, Argentina ABSTRACT—A well-preserved dentary from the Late Cretaceous of Neuquén Province, Argentina, represents a new taxon of sebecosuchian crocodyliform, Pehuenchesuchus enderi. The specimen retains a number of di...
Vertebrate remains from the Late Albian–Early Cenomanian Candeleros Formation of northwestern Patagonia include those of a pipoid frog, which is described herein. The fossils consist of partially articulated and disarticulated elements, some of them badly broken, that are mostly exposed in ventral aspect. The description is based on one incomplete...
We describe sixteen theropod dinosaur trackways from site III (Lower Cretaceous?) of the Quebrada Cha-carilla in the Chacarilla Formation (Jurassic-Lower Cretaceous), northern Chile. The trackbed belongs to a meandering river environment, with recurrent track assemblages. We fi nd that the main direction of the ichnites from site III parallels that...
Aspects of the cranial and postcranial anatomy are presented for a new specimen of the Upper Cretaceous Gondwanan snake, Dinilysia patagonica Woodward, 1901, collected near Paso Cordoba, Rio Negro Province, Argentina, during the field season of 2001. The specimen preserves important features of the dentary and postdentary bones (in particular the c...
Aspects of the cranial and postcranial anatomy are presented for a new specimen of the Upper Cretaceous Gondwanan snake, Dinilysia patagonica Woodward, 1901, collected near Paso Cordoba, Rio Negro Province, Argentina, during the field season of 2001. The specimen preserves important features of the dentary and postdentary bones (in particular the c...
Aspects of the cranial and postcranial anatomy are presented for a new specimen of the Upper Cretaceous Gondwanan snake, Dinilysia patagonica Woodward, 1901, collected near Paso Cordoba, Rio Negro Province, Argentina, during the field season of 2001. The specimen preserves important features of the dentary and postdentary bones (in particular the c...
New materials of Notosuchus terrestris are here described. They were found on Bajo de la
Carpa Formation outcrops, near the Universidad Nacional del Comahue, Neuquén City. Descriptions were based on five specimens, one of them the only specimen of Notosuchus with postcranial remains articulated to the skull. As in Sphagesaurus, it presents triangul...
We describe sixteen theropod dinosaur trackways from site III (Lower Cretaceous?) of the Quebrada Cha-carilla in the ChacariUa Formation (Jurassic-Lower Cretaceous), northern Chile. The trackbed belongs to a meandering river environment, with recurrent track assemblages. We find that the main direction of the ichnites from site III parallels that o...
We describe sixteen theropod dinosaur trackways from site III (Lower Cretaceous?) of the Quebrada Cha-carilla in the ChacariUa Formation (Jurassic-Lower Cretaceous), northern Chile. The trackbed belongs to a meandering river environment, with recurrent track assemblages. We find that the main direction of the ichnites from site III parallels that o...
Titanosaurs are among the largest dinosaurs known to date. Here we describe the anatomy of Futalognkosaurus dukei, the most complete giant sauropod ever found. It comes from outcrops of the Portezuelo Formation at the Barreales lake, some 90 km northwest of Neuquén city (Patagonia). The specimen consists of a complete neck, dorsal vertebrae with ri...
The remains of “protosuchians” from the Cretaceous come, to exception of “Las Hoyas
crocodyliform” from the Lower Cretaceous of Spain, exclusively of Central Asia: Zaraasuchus, Gobiosuchus,
Zosuchus, and Artzosuchus from the Upper Cretaceous of Mongolia; Tagarosuchus from Lower Cretaceous of
Southern Siberia; Edentosuchus, Sichuanosuchus, and Shant...