Nicolas Chimento

Nicolas Chimento
Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" · Laboratorio de Anatomía Comparada y Evolución de los Vertebrados

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79
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507
Citations
Citations since 2016
41 Research Items
417 Citations
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2016201720182019202020212022020406080100
2016201720182019202020212022020406080100

Publications

Publications (79)
Article
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Pleistocene large carnivores from the Pampean Region have been studied almost always based on bone remains. Here we report the first coprolite of a large carnivore from the Late Pleistocene of the Pampean Region, Argentina. The coprolite was found associated with megafauna bone remains and it shows the typical shape and size of a carnivorous mammal...
Article
The deposits of the Chorrillo Formation (Maastrichtian) were accumulated during a ‘continental window’ that occurred during the Late Cretaceous in the Austral-Magallanes foreland basin, southern Patagonia, Argentina. The aim of the present contribution is to describe the depositional conditions as well as new vertebrate and plant fossils from this...
Article
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ON THE CRANIAL ANATOMY OF MORENELAPHUS (CARETTE 1922) (MAMMALIA, CERVIDAE) AND ITS RELATIVES: STUDY OF THE ANATOMY OF THE BRASICRANIUM. Among South American fossil deer, Morenelaphus is the most conspicuous genus from the Pleistocene beds of Argentina. However, its fossil record in South America is almost known only by antlers, the anatomy of the...
Article
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La recolección y análisis de egagrópilas resulta un método adecuado en el estudio de presas pequeñas, debido a que permite el estudio de áreas extensas, genera gran cantidad y variedad de individuos por lote. El orden Strigiformes cuenta con el mayor número de estudios de dieta de aves rapaces a nivel mundial, destacándose los referidos a Tyto furc...
Article
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The maned wolf ( Chrysocyon brachyurus , Illiger 1815) is the largest canid in South America. The objective of this work is to present a new border registry of Chrysocyon brachyurus , in the Department of Gualeguay, Province of Entre Ríos (32°59'51.78''S, 59°30'59.12''W); validate its membership in that taxon through the use of the COI molecular ma...
Article
The fossil record of gondwanatherian mammaliaforms from Patagonia is represented by several species known on the basis of isolated teeth, with the single exception of a partial dentary with two molariforms of the Paleocene species Sudamerica ameghinoi. The aim of the present contribution is to describe both a fragmentary dentary (with the base of t...
Preprint
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La presencia actual de Puma concolor en Entre Ríos sigue siendo controversial, pero apariciones recientes de gran impacto periodístico lo ponen en discusión. En este trabajo se reportan registros actuales e históricos de la especie en la provincia que fueron contrastados con mapas de unidades ambientales y bioclimáticas para analizar su distribució...
Preprint
Full-text available
La presencia actual de Puma concolor en Entre Ríos sigue siendo controversial, pero apariciones recientes de gran impacto periodístico lo ponen en discusión. En este trabajo se reportan registros actuales e históricos de la especie en la provincia que fueron contrastados con mapas de unidades ambientales y bioclimáticas para analizar su distribució...
Article
Full-text available
Gondwanatheria is an enigmatic mammaliaform clade distributed in the Cretaceous and Paleogene of South America, Africa, Madagascar, India and Antarctica. The Mesozoic record in South America is restricted to the Latest Cretaceous of Río Negro and Chubut provinces, Argentina and Magallanes Region of southern Chile. The aim of the present contributio...
Article
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Recientemente la mastozoología ha visto un renacer de los estudios taxonómicos. En este sentido, las colecciones mastozoológicas depositadas en instituciones científicas son de un patrimonio científico incalculable. La Fundación de Historia Natural Félix de Azara resguarda más de 14.000 piezas correspondientes a la colección Mastozoológica, lo que...
Article
The genus Megatherium includes nearly ten species that are distributed along the Pleistocene of South America. In contrast with the abundant and geographically widespread Pleistocene record, remains of Pliocene Megatherium are restricted to a single and poorly known species from the highlands of Perú. The aim of the present contribution is to descr...
Article
Full-text available
Until little more than a decade before, knowledge about Puma concolor in the pampas of Buenos Aires province was so scarce that even some geographic range maps didn’t include the species in this vast area, considering it extinct. Since 2010 research developed as part of the “Project Puma de las Pampas” identified reproductive populations and the ex...
Article
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The Litopterna is an extinct clade of endemic South American ungulates that range from Paleocene up to late Pleistocene times. Because of their unique anatomy, litopterns are of uncertain phylogenetic affinities. However, some nineteenth century authors, considered litopterns as related to perissodactyl ungulates, a hypothesis recently sustained by...
Article
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The first fossil remains of vertebrates, invertebrates, plants and palynomorphs of the Chorrillo Formation (Austral Basin), about 30km to the SW of the town of El Calafate (Province of Santa Cruz), are described. Fossils include the elasmarian (basal Iguanodontia) Isasicursor santacrucensis gen. et sp. nov., the large titanosaur Nullotitan glaciari...
Article
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After K-P extinction, Patagonian crocodyliforms became less diverse, and scarcer in Paleogene layers. The specimen here described comes from “Puerta del Diablo” ranch at the Natural Protected Area of Paso Córdoba, southwestern of General Roca city (Río Negro province, Argentina) and was found in strata from the Chichinales Formation, Early Miocene...
Article
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Recientemente, el extinto león americano Panthera atrox, emparentado en forma cercana a leones y tigres fue descubierto en el Pleistoceno tardío de diversas localidades de la Patagonia de Chile y Argentina. Aunque los restos de estos leones son relativamente escasos, eran conocidos desde finales del siglo XIX, pero la mayor parte de los especialist...
Article
The saber-toothed cat Smilodon is a characteristic genus of the Pleistocene faunas of the American continent. Smilodon belongs to an extinct clade of felids that had hypertrophied blade-like upper canines. Because the length of the canines is so extreme, the killing bite of Smilodon is a hotly debated topic in vertebrate paleontology. Some authors...
Article
Recent analyses resulted in the recognition of a single species of the genus Megatherium in the pampas of Argentina. The finding of a specimen consisting on a dentary and femur from the late Pleistocene of Buenos Aires Province, Argentina, indicates that a very small-sized species of the genus was present in the Pampean Region. This allows revalida...
Article
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Felidae is represented in South America by approximately ten species, belonging to three main phylogenetic lineages: the Ocelot lineage, the Puma lineage, and the Panthera lineage. Pumas (Puma concolor) and jaguarundis (Puma yagouaroundi), together with the African cheetahs (Acinonyx jubatus), compose the puma lineage. Paleontological knowledge abo...
Article
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The aim of the present contribution is to describe large felipedid footprints from a new ichnological site from the Late Pleistocene of Buenos Aires Province, Argentina. The prints are referred as the new ichnospecies Felipeda miramarensis nov. ichnosp. Based on size and morphology, this new ichnotaxon may have been produced by the large machairodo...
Article
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Floating meadows known as “camalotales” are important way of biogeographical dispersal at the Río de la Plata basin. However, the fauna transported in these rafts is a scarce studied topic. This work presents a survey of this fauna, for which different localities of its coast were visited after the floods in the summer season from December 2015 to...
Article
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The “Burrowing Owl” Athene cunicularia (Strigidae) feeds on a wide range of prey, in which arthropods constitute an important food item. With the objective of knowing the Opiliones and Scorpiones that serve as prey for this bird, an analysis of the arachnids contained in their owl pellets in the locality of Cabañas Mar Dulce, Magdalena municipality...
Article
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This paper aims to contribute to the stratigraphic and geochronological knowledge of the Neogene–Quaternary of the geologic province of Tandilia by doing lithostratigraphic, paleomagnetic and paleontological analyses. Four lithostratigraphic units have been recognized. The oldest (Late Miocene) constitutes a unit composed of colluvium deposits; it...
Article
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Many dinosaur skeletons show evidence of behavior, including feeding, predation, nesting, and parental care. The resting posture of the forelimbs has been studied in some theropod species, in relation to the acquisition of flight in advanced maniraptoran theropods. Chilesaurus diegosuarezi is a bizarre tetanuran recently described from the Toqui Fo...
Article
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By the late 19th and early 20th centuries, authors described several specimens belonging to a very large felid, the size of a lion, from some Late Pleistocene localities at southern Chile and Argentina. These remains were considered as belonging to large and now extinct subspecies of jaguar. In the present contribution based on qualitative and quan...
Article
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La ribera de los partidos de Quilmes y Avellaneda corresponde al Distrito fitogeográfico de la Pampa Oriental. El presente trabajo tiene por objetivo categorizar los bosques ribereños de los partidos de Quilmes y Avellaneda, en el marco de la ley Nacional N° 26.331 de Presupuestos Mínimos para la Protección Ambiental de los Bosques Nativos y su reg...
Article
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La ribera de los partidos de Quilmes y Avellaneda corresponde al Distrito fitogeográfico de la Pampa Oriental. El presente trabajo tiene por objetivo categorizar los bosques ribereños de los partidos de Quilmes y Avellaneda, en el marco de la ley Nacional N° 26.331 de Presupuestos Mínimos para la Protección Ambiental de los Bosques Nativos y su reg...
Article
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The present contribution describes theropod remains coming from the Huincul Formation (Neuquén Group; Cenomanian-Turonian; Upper Cretaceous) at a single locality located in northwestern Río Negro province, Patagonia, Argentina. This theropod association is composed of abelisauroids, two different-sized carcharodontosaurid allosauroids, a coelurosau...
Chapter
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Durante muchos años se han discutido y propuesto distintos arreglos sistemáticos para las distintas especies de felinos actuales sudamericanos, muchos de los cuales han cambiado en las últimas décadas debido al aporte proveniente de datos moleculares. Actualmente se asume la existencia de tres linajes evolutivos de Felinae (Leopardus-Puma-Panthera)...
Chapter
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The fossil record of Mesozoic mammals from Argentina is the most complete and diverse among Gondwanan landmasses, thus it became in a reference to understand the evolution and paleogeography of the group. In this contribution we discuss some ideas on the taxonomy of poorly documented mammals from other Gondwanan localities and their paleobiogeograp...
Article
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Cenozoic mammalian faunas from South America contrast with those of the other continents by the great diversification of metatherian mammals. Among the later, a wide range of morphological disparity have been reported, and several bizarre mammals have been assigned to such clade, based mainly on biogeographical grounds. Outstanding examples of biza...
Article
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Theropod dinosaurs were the dominant predators in most Mesozoic era terrestrial ecosystems. Early theropod evolution is currently interpreted as the diversification of various carnivorous and cursorial taxa, whereas the acquisition of herbivorism, together with the secondary loss of cursorial adaptations, occurred much later among advanced coeluros...
Article
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Resumen. El puma (Puma concolor) es el carnívoro terrestre con la más amplia distribución en el continente americano. Es un carnívoro de gran resiliencia, capaz de subsistir en ambientes modificados por el hombre. No obstante, Puma concolor ha sufrido retracciones en su rango y extinciones locales. Esto ha tenido lugar en la ecorregión Pampeana. Re...
Preprint
Full-text available
Recent discoveries demonstrated that the southern continents were a cradle for the evolutionary radiation of dryolestoid mammals at the end of the Cretaceous. Moreover, it becomes evident that some of these early mammals surpassed the K/T boundary in South America, at least. Notoryctes is a poorly known living mammal, currently distributed in the d...
Preprint
Recent discoveries demonstrated that the southern continents were a cradle for the evolutionary radiation of dryolestoid mammals at the end of the Cretaceous. Moreover, it becomes evident that some of these early mammals surpassed the K/T boundary in South America, at least. Notoryctes is a poorly known living mammal, currently distributed in the d...
Article
Full-text available
Resumen. PUMA (HERPAILURUS) PUMOIDES (CASTELLANOS, 1958) NOV. COMB. COMENTARIOS SISTEMÁTICOS Y REGISTRO FÓSIL. Entre los Felinae de procedencia dudosa descritos para Argentina se encuentra Felis pumoides Castellanos 1958, hallado en estratos asignados al Plioceno (" horizonte Brocherense ") de la provincia de Córdoba (Argentina). Los restos cranean...
Article
Full-text available
Capybara (Hydrochoerus hydrochaeris) is the world largest rodent and a typical mammal of the phytogeographical provinces of Pampa and Espinal, inhabiting the eastern sector of the same. These regions have been categorized by the World Wildlife Foundation (WWF) as “critical/endangered threatened” and are assigned the highest priority level of conser...
Article
Full-text available
Cenozoic mammalian faunas from South America contrast with those of the other continents by the great diversification of metatherian mammals. Among the later, a wide range of morphological disparity have been reported, and several bizarre mammals have been assigned to such clade, based mainly on biogeographical grounds. Outstanding examples of biza...
Article
Full-text available
Capybara (Hydrochoerus hydrochaeris) is the world largest rodent and a typical mammal of the phytogeographical provinces of Pampa and Espinal, inhabiting the eastern sector of the same. These regions have been categorized by the World Wildlife Foundation (WWF) as “critical/endangered threatened” and are assigned the highest priority level of conser...
Article
Full-text available
En esta contribución se presenta la riqueza específica y abundancia relativa de mamíferos en un remanente de bosque xerófilo en la cuenca media del río Carcarañá (32°582 S – 61°152 O), provincia de Santa Fe, Argentina. Las formaciones vegetales autóctonas observadas, pertenecientes a la provincia fitogeográfica del Espinal, se caracterizan por pres...
Article
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In this paper we present an analysis of bird species present in different vegetational units of the Avellaneda and Quilmes Departments. The study was made on a 300 hectares area (more than 3.000.000 m2). As a result 124 avian species were recorded at the Coast Woods, Wetlands, and Tala Woods. In spite of being highly depauperate due to invasion of...
Article
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This work includes the partial results of the prospections made in order to record the biological richness of the La Plata River coastal area at Avellaneda and Quilmes departments. Here we provide a description of the environment and the results of the studies of Opiliones, Mygalomorphae, and Chilopoda taxocenosis. The results are contrasted with t...