Federico Agnolin

Federico Agnolin
Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"

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Introduction
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Publications

Publications (319)
Article
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The aim of the present contribution is to review the taxonomy of the loricariid Sturisoma in the La Plata basin. The original description of the species S. barbatum is analyzed and compared to Regan’s later description of S. robustum. We noticed that Kner’s illustrations may have influenced the description by Regan and other later authors, leading...
Article
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Azhdarchid pterosaurs in South America were hitherto represented by two taxa coming from Coniacian-Santonian and Maastrichtian beds, of the Mendoza and Río Negro provinces, respectively, in Argentina. Here we report an incomplete pterosaur cervical vertebra from Cenomanian beds exposed at the east shore of Ezequiel Ramos Mexía Reservoir at the Río...
Article
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This present work reports new data on the palaeohistology of Chañares Formation (early Carnian) proterochampsids based on appendicular bones, particularly Chanaresuchus bonapartei Romer, 1971 (i.e., PULR-V 116, femur, tibia and fibula) and Tropidosuchus romeri Arcucci, 1990 (i.e., PVL-4606, femur), and provides new insights into their paleobiology,...
Article
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Dinosaurs and pterosaurs have remarkable diversity and disparity through most of the Mesozoic Era1–3. Soon after their origins, these reptiles diversified into a number of long-lived lineages, evolved unprecedented ecologies (for example, flying, large herbivorous forms) and spread across Pangaea4,5. Recent discoveries of dinosaur and pterosaur pre...
Article
Vegavis iaai is without any doubt the most complete and well-known Mesozoic bird from Antarctica. In spite of being known by several specimens, its highly specialized postcranial anatomy has obscured the recognition of its phylogenetic affinities. Skull material from Vegavis is scarce, and the lower jaw is known by a relatively well-preserved artic...
Chapter
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INTRODUCCIÓN En contraposición con el abundante registro de invertebrados marinos del Holoceno (véase resumen en Cavallotto, 2009), la información édita sobre vertebrados fósiles te-rrestres correspondiente al área del Parque Costero del Sur, refiere mayormente a unos pocos hallazgos puntuales y restos aislados (e. g., Agnolín et al., 2020). Como e...
Chapter
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El paisaje tan característico de la llanura costera que se conserva en el "Parque Costero del Sur" muestra evidentes signos de los fuertes cambios ambientales que le acontecieron en los últimos miles de años. Particularmente, hace unos 6500 años antes del presente (AP) donde el mar Atlántico avanzó sobre el Río de la Plata, transgredió su costa y c...
Conference Paper
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The Neogene avifauna record from San Juan Province is poorly known. The aim of the present contribution is the description of a new diverse Late Miocene assemblage from Las Flores Formation, cropping out in the area of Puchuzum in the Calingasta Valley (San Juan Province, Argentina). Bearing levels represent fluvial systems of meandering rivers and...
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This contribution includes the analysis of 39 pieces of the Vertebrate Paleontology Collection of the Argentinean Museum of Natural Sciences “Bernardino Rivadavia”. These specimens were acquired before 1925 from the Heidelberger Mineralien-Comptoir company, which was a firm specialized in mineral and fossil commercialization during XIX and beginni...
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The aim of present contribution is to describe the osteohistology of an articulated skeleton of an unnamed elasmosaurid coming from Santa Cruz province, Argentina, and recovered in late Cretaceous beds of Calafate Formation (Maastrichtian). Histological analysis indicates that the specimen reached somatic and sexual maturity. The specimen exhibits...
Article
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Monotremata is a clade of egg-lying mammals, represented by the living platypus and echidnas, which is endemic to Australia, and adjacent islands. Occurrence of basal monotremes in the Early Cretaceous of Australia has led to the consensus that this clade originated on that continent, arriving later to South America. Here we report on the discovery...
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La ocurrencia de restos óseos fósiles a lo largo de la costa bonaerense es un acontecimiento frecuente, ya sea en el litoral marino como en la ribera rioplatense. El Río de la Plata con frecuencia desentierra de sus costas o de los diferentes sedimentos que conforman su lecho, distintos tipos de fósiles que con el correr del tiempo terminan deposit...
Article
Enantiornithes were the dominant avialan clade in the Mesozoic. However, their record for the Upper Cretaceous is scarce. In this study, we present and describe Yatenavis ieujensis gen. et sp. nov., one of the youngest occurrence of an enantiornithine bird. The specimen, the distal half of a right humerus, was found in Chorrillo Formation, southern...
Conference Paper
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El género Chloephaga incluye cuatro especies que habitan en la Patagonia argentina y chilena. Si bien hoy en día son elementos frecuentes en la avifauna de nuestro país, su registro fósil es relativamente escaso. En la presente contribución se dan a conocer nuevos registros de cauquenes en niveles del Pleistoceno (Secuencia San José) aflorantes en...
Conference Paper
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Vegavis iaai es una de las aves más completas y mejor conocidas del Cretácico de Antártida. A pesar de esto, su anatomía postcraneana altamente especializada dificulta deducir su posición filogenética. Los materiales craneanos son muy escasos, entre ellos se encuentra la región articular de una mandíbula y un pterigoides, ambos pertenecientes al ej...
Article
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The aim of the present contribution is to examine the bone histology of two non-mammaliaform cynodonts recovered from the Late Triassic (Carnian) Chañares Formation, at Los Chañares locality, La Rioja province, Northwestern Argentina. The taxa analysed here are the Traversodontidae Massetognathus pascuali and the Probainognathidae Probainognathus j...
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New World capuchin monkeys are well-known by their ability to solve problems using stone tools that have the characteristics and morphology of some human-made stone tools. The aim of the present contribution is to carry out brief comparisons between the Pleistocene archeological sites from Brazil (e.g. Pedra Furada, Sitio do Meio, Vale da Pedra Fur...
Article
The present contribution aims is to analyze the fossil record of the genus Echinorhinus in South America, and particularly Argentina. We made a first-hand examination of the species Echinorhinus pozzi from the early Miocene of Patagonia, and recognize it as a valid taxon. The species was originally described in the XIX century, and since then no au...
Article
Skorpiovenator bustingorryi is a derived abelisaurid theropod represented by a fairly complete skeleton from the Late Cretaceous sedimentary beds of north-western Patagonia. Although some features were described in the original paper, mainly related to the skull, the appendicular anatomy remains undescribed. The aim of the present contribution is t...
Article
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The fossil record of condors in South America is relatively extensive. However, fossil specimens from the late Pleistocene of Argentina are still very scarce. Here, we describe fragmentary remains of a large sized cathartid of the condor lineage. The new specimen is represented by an incomplete ulna, radius and metacarpal belonging to the Lujanian...
Article
The aim of the present contribution is to describe a partial coracoid (CTES-PZ 7797) coming from Upper Pleistocene Toropí/Yupoí Formation, in Corrientes province, Argentina. The comparative anatomical analysis indicates that it belongs to an indeterminate species of the goose genus Chloephaga, but sharing some characters with the living C. picta. T...
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
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55 MATADEROS. Pampa y asfalto 54 Adoquines que cuentan (pre) historia Mataderos conserva aún empedrados que persisten desde su época fundacional. Las calles San Pedro, Gral. Garzón, y el Paseo Liborio Pupillo, especie de calle semicircu-lar que rodea la estatua El Resero, dan tes-timonio de estos adoquines; Lisandro de la Torre, en cambio, contiene...
Article
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Desde mediados del siglo XIX, los paleon-tólogos buscan y encuentran restos fósiles de animales en la ciudad de Buenos Aires y sus inmediaciones. La ciudad nació ha-cia fines del siglo XVI ajustada a las pres-cripciones de la Corona española, contenidas en las Or-denanzas de la Población, que eran parte de las Leyes de Indias. Esas normas incluían,...
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Elio Massoia (1936-2001) se interesó desde joven por las ciencias naturales y rápidamente descubrió en los mamíferos, y especialmente entre los roedores, un campo de investigación casi ilimitado. Durante su vida Massoia generó más de 250 trabajos publicados y editó una revista de comunicaciones científicas de elaboración muy artesanal que se convir...
Article
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In this contribution, we seek to make visible a set of fossils from the well-known fossiliferous locality of Monte Bolca, Verona, Italy. The set is part of the paleontological heritage that protects the Museum of Natural and Anthropological Sciences “Prof. Antonio Serrano” of Paraná, Entre Ríos. The materials were acquired from the Civic Museum of...
Article
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The Greater Rhea (Rhea americana, Rheidae) is a flightless paleognath with a wide geographical distribution in South America. The morphology of its shoulder girdle and wings are different from those of flying birds and some characteristics are similar to basal birds and paravian theropods. We present a detailed osteological, myological, and functio...
Article
The aim of the present contribution is to review the fossil record of chimaeroids in Argentina. We review previous records from Argentina, including the presence of Cretaceous chimaeroids reported by Ameghino in the 19th century from the Cretaceous of Santa Cruz province. We re-analyse the species Callorhynchus crassus described from the Miocene of...
Article
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Megaraptora is a theropod clade known from former Gondwana landmasses and Asia. Most members of the clade are known from the Early to Late Cretaceous (Barremian–Santonian), with Maastrichtian megaraptorans known only from isolated and poorly informative remains. The aim of the present contribution is to describe a partial skeleton of a megaraptorid...
Article
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Armored catfshes of the subfamily Loricariinae include more than 250 species and 31 genera distributed along South America from Costa Rica to Buenos Aires province in central Argentina. In spite of that, the entire clade lacks a single paleontological record. In this work, a new species of Loricariinae belonging to the genus Sturisomatichthys from...
Article
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Here we describe a new hadrosaurid from the Upper Cretaceous (Campanian-Maastrichtian) Allen Formation of R ıo Negro Province, northwest Patagonia. The new taxon is based on cranial and postcranial elements from subadult and adult specimens. The new taxon may have reached 8-9 m in total body length, and it is diagnosed by a unique combination of ch...
Article
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The fossil record of abelisaurid theropods in South America is mostly limited to Brazil and Argentina. In Argentina, abelisaurids are generally known from Patagonia, where their record is relatively abundant and includes well-known and complete specimens. However, for Northwestern Argentina, abelisaurids are represented by incomplete and isolated b...
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...
Preprint
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Megaraptorans are a theropod clade distributed in former Gondwana landmasses and Asia. Most members of the clade are known from early Cretaceous to Turonian times whereas Maastrichtian megaraptorans are known just from isolated and poorly informative remains. The aim of present contribution is to describe a partial skeleton of a megaraptorid coming...
Article
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The fossil record of freshwater fishes and anurans from the Miocene in Patagonia is relatively patchy, a large number of specimens remaining undescribed. The aim of the present contribution is to describe a fossil association of percomorphacean fishes and calyptocephalellid anurans from the early to late Miocene Collón Curá Formation, at Chubut pro...
Article
The fossil record of the genus Bothrops is still sparse in South America. Most records belong to extant species recovered in strata not older than the late Pleistocene. The genus was also tentatively reported from the early Pliocene and earlymiddle Pleistocene of Buenos Aires province, Argentina, based on fragmentary specimens. The aim of the prese...
Article
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The fossil record of Early Cretaceous birds in South America has been restricted to members of Enantiornithes from the Crato Formation (Aptian) of Brazil. Here we describe a new genus and species of bird discovered at Pedra Branca Mine, Nova Olinda County, Ceará State, Brazil, which adds to the avian fossil record from the Crato Formation. The spec...
Article
The record of sauropods in the Upper Cretaceous of Patagonia is rich. However, there are still several blanks on this record. Here it is described a new sauropod assemblage coming from the Salitral Ojo de Agua Area, Río Negro province, northern Patagonia, Argentina (Allen Formation; Maastrichtian). Remains of indeterminate saltasaurines, aeolosauri...
Article
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Carcharocles megalodon is considered a macropredatory shark that inhabited the seas around the world from middle Miocene to late Pliocene. In Argentina, it has only been formally recorded at two localities. Here, we report the first record for this taxon in the Buenos Aires Province. This occurrence is based on an isolated tooth recovered on the be...
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Lewisuchus admixtus is an early dinosauriform described by Alfred Romer in 1972 on the basis of a single, incomplete skeleton, collected in lower Upper Triassic rocks of the renowned Chañares Formation, at the Los Chañares type‐locality, La Rioja Province, north‐western Argentina. Recent field explorations to the type‐locality resulted in the disco...
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The record of Cretaceous terrestrial lizards (Squamata) in South America is patchy, with seven species described from north-eastern and south-eastern Brazil, and few isolated records of iguanians and scincomorphans from the Argentinian Patagonia. Herein we describe a new genus and species of Cretaceous lizard, Paleochelco occultato gen. et sp. nov....
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We describe the basal mesoeucrocodylian Burkesuchus mallingrandensis nov. gen. et sp., from th Upper Jurassic (Tithonian) Toqui Formation of southern Chile. The new taxon constitutes one of the few records of non-pelagic Jurassic crocodyliforms for the entire South American continent. Burkesuchus was found on the same levels that yielded titanosaur...
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...
Article
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Se reporta la presencia de dos especies del género Gomphocarpus (Apocynaceae, Asclepiadoideae) que crecen espontáneamente en la Argentina: G. fruticosus (escapada de cultivo) y G. physocarpus (naturalizada). Las mismas se describen, se indica su distribución geográfica, usos, polinización y dispersión. Además, se analiza el estatus de naturalizació...
Article
Alvarezsaurs were a group of theropod dinosaurs found in Asia, North America, South America and Europe during Jurassic and Cretaceous periods. In spite of being known by several specimens, diverse aspects of their anatomy remain poorly known. The aim of the present paper is to describe and analyse some points of the neuroanatomy of a newly collecte...
Article
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In 1976 John Ostrom published an enlightening paper about the anatomical transformations in the shoulder girdle and forelimb elements along the origin of birds. Most of his ideas were based on comparing Archaeopteryx lithographica with the extant New World vulture Cathartes aura. Ostrom offered innovative ideas about range of movements and function...
Article
The fossil record of ornithischians in South America is sparse, and they are clearly underrepresented when compared with sauropod dinosaurs. However, recent discoveries indicate that ornithischians were more diversified than thought. The aim of the present contribution is to describe isolated remains belonging to ankylosaurs, and ornithopods, inclu...
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Unenlagia comahuensis was originally described as a phylogenetic link between nonavian dinosaurs and birds. Later it was interpreted by some authors as belonging to the deinonychosaurian clade Dromaeosauridae, and more recently as phylogenetically closer to birds than to dromaeosaurids. The only known specimen is represented by an incomplete skelet...
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Triassic beds from Argentina and Brazil provide the most relevant fossil record of early dinosauriforms in terms of numerical abundance and taxonomic diversity. This record currently represents the best source to understand the origin and early evolutionary radiation of dinosaurs. In the present paper we offer an updated review focused on the avail...
Article
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An incomplete tarsometatarsus of a fossil Ciconiidae is here described. It comes from the Tarija Formation (Lower-Middle Pleistocene) of Bolivia. It is assigned to the large extinct species Ciconia maltha, recorded in the Mid-Late Pleistocene of North and Central America. The material here reported represents the fi rst fossil record for Ciconia ma...
Article
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The fossil record of birds in South America is still very patchy. One of the most remarkable birds found in Miocene deposits from Patagonia is Brontornis burmeisteri Moreno and Mercerat, 1891. This giant flightless bird is known by multiple incomplete specimens that represent a few portions of the skeleton, mainly hindlimb bones. Since the XIX cent...
Article
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The fossil record of fishes from the Farola de Monte Hermoso locality (lower Pliocene) in the southern Buenos Aires province, Argentina, shows an unusual composition. The locality at the southern boundary of the Brazilian Ichthyogeographic Realm. However, its fossil record is composed of fossil fishes that are not necessarily related to Brazilian l...
Article
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The aim of the present contribution is to describe a partial fossil skull belonging to the catfish genus Sorubim. The specimen originates from the Late Miocene Ituzaingó Formation, at Paraná locality, Entre Ríos Province, Argentina. The material described here (MACN Pv-14224) was determined just to genus because the living species of Sorubim are mo...
Article
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Resumen: Entre 1956 y 1965 los paleontólogos Osvaldo A. Reig y Rodolfo M. Casamiquela llevaron adelante una serie de trabajos sobre anuros fósiles que impactaron de manera decisiva sobre la comunidad paleontológica. Sus trabajos consistieron en la descripción de una gran diversidad de anuros sudamericanos extintos así como en los hallazgos de las e...
Article
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Diverse hypotheses have been proposed with the aim to explain the extinction of Late Pleistocene/Holocene mammals, including the Megafauna from America. Some authors support that human being was the direct responsible of extinction by means of intensive hunting, as proposed by the “blitzkrieg” or overkilling hypothesis. However, evidence is not con...
Article
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Pterosaurs were the first vertebrates to evolve powered flight¹ and comprised one of the main evolutionary radiations in terrestrial ecosystems of the Mesozoic era (approximately 252–66 million years ago), but their origin has remained an unresolved enigma in palaeontology since the nineteenth century2–4. These flying reptiles have been hypothesize...
Article
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Presence of Proterotheriidae (Mammalia, Litopterna) in the Pleistocene of the Bonaerian Pampas. The fossil record of Pleistocene Proterotheriidae is scarce. It is restricted to the species Neolicaphrium recens known from Brazil, Uruguay, and Argentina, and to Uruguayodon alius, from Uruguay. Up to the date, proterotheriids are absent from the Pleis...
Article
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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
The fossil record of chondrichthyans in Argentina is still poorly known. The aim of the present contribution is to describe teeth representing a chondrichthyan assemblage from Man Aike Formation (late Eocene) exposed in the Lago Argentino area, at Santa Cruz province, Argentina. This report includes Striatolamia macrota, Macrorhizodus praecursor, C...
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
Abelisaurid theropods are well known in Cretaceous beds along South America, particularly Patagonia. However, the record of latest Cretaceous abelisauroids is still far from satisfactory. Until recently, few taxa were described from Maastrichtian beds: Carnotaurus sastrei and Quilmesaurus curriei, but also perhaps Abelisaurus comahuensis. In this c...
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Discussions about the origin of flight almost unanimously assume that early birds positioned (and moved) their wings in the same basic manner as living flying birds, with reconstructed wings extended with the airfoil surface parallel to the ground and forelimbs moving in a dorsoventral arc. Such reconstructions of wing posture and movements for ext...