Alberto Garrido

Alberto Garrido
Dirección Provincial de Minería, Neuquén, Argentina · Museo Provincial de Ciencias Naturales "Prof. Dr. Juan A. Olsacher"

Geologist

About

128
Publications
53,821
Reads
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2,283
Citations
Citations since 2017
39 Research Items
1259 Citations
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
Additional affiliations
August 2014 - present
Universidad Nacional del Comahue
Position
  • Professor

Publications

Publications (128)
Article
Full-text available
The Cerro Overo-La Invernada area in north Patagonia has provided a rich record of Cretaceous continental tetrapods in the last two decades, mainly from the Bajo de la Carpa Formation (Upper Cretaceous, Santonian). The dinosaur fauna from this area is diverse, including several new taxa, with abelisaurid theropods particularly abundant. Recently, a...
Article
We report new occurrences of Testudinidae and Chelidae from 11 different fossil sites in the Huayquerías and Tunuyán formations (late Miocene–Pliocene) in the Huayquerías del Este, Mendoza, Argentina. A total of 36 specimens were collected, representing at least three taxa from two different clades: 80.6% Testudinidae and 19.4% Chelidae. Testudinid...
Conference Paper
Full-text available
The diversity of the Upper Cretaceous (Cenomanian to Maastrichtian) crocodyliforms in Argentina is represented by several families of notosuchians (Notosuchidae, Comahuesuchidae, Baurusuchidae, Peirosauridae), and basal mesoeucrocodylian taxa. Most species (such as Neuquensuchus universitas, Notosuchus terrestris, Comahuesuchus brachybuccalis, Cyno...
Article
The Valcheta Petrified Forest is located in the northeast of the Río Negro Province, Argentina. This work provides a geological characterization of the site and a survey of the fossil logs exposed on the surface and their systematic study. The fossiliferous levels bearing the silicified logs are here referred to the Allen Formation (middle-upper Ca...
Article
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...
Article
Full-text available
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, Taurovena...
Article
Among the ammonite collection from the Neuquén and Mendoza provinces made by G. Bodenbender, stands Aspidoceras bodenbenderi Behrendsen. This rare aspidoceratid is assigned to the lower Alternans Zone because of the associated Parodontoceras calistoides (Behrendsen), and can be most likely attributed to the recently established genus Hypowaagenia S...
Article
Studies carried out on fossil reptiles housed in the collections of the “Prof. Dr. Juan A. Olsacher” museum in the city of Zapala (Neuquén) have been oriented towards marine and continental forms of the Jurassic and Lower Cretaceous and lower Upper Cretaceous of the Neuquina Basin. In association with the Dirección Provincial de Minería from its or...
Preprint
Two new specimens of abelisaurid theropods from La Invernada fossil area (Bajo de la Carpa Formation; Santonian) are described. They correspond to an incomplete skull and several postcranial remains. MAU-Pv-LI-582 (skull) shares some morphological traits with other furileusaurs (Viavenator exxoni and Llukalkan aliocranianus) from the same area, as:...
Article
In the Neuquén Basin, the Portezuelo Formation (Turonian-Coniacian, Upper Cretaceous) is represented by extended fluvial outcrops that are well-known for yielding an abundant and diversified vertebrate fossil record. However, most of the sauropod fossil record is represented by incomplete specimens, and only two taxa are formally described for the...
Article
Jurassic and Cretaceous marine deposits worldwide show that ophthalmosaurid ichthyosaurs are major components of marine tetrapod communities for almost 76 myr. One of the major features characterizing this clade is the complexity and diversity of their stylopodium–zeugopodium morphology. Upper Jurassic deposits of the Vaca Muerta Formation in north...
Article
Thunnosaurian ichthyosaurs were one of the most successful lineages of Mesozoic tetrapods in terms of adaptation to a pelagic lifestyle. Among them, the ophthalmosaurids are of particular interest. Their fossils document an early widespread distribution, including high northern and southern latitudes soon after they appear at the Aalenian–Bajocian...
Article
Abelisaurids are among the most abundant and diverse Patagonian Late Cretaceous theropods. Here, we present a new furileusaurian abelisaurid, Llukalkan aliocranianus gen. et sp. nov., represented by cranial remains from the Bajo de la Carpa Formation (Santonian) at La Invernada fossil area, northwestern Patagonia. Features characterizing this taxon...
Article
One of the most fascinating research topics in the field of sauropod dinosaurs is the evolution of gigantism. In the particular case of Titanosauria, the record of multi-ton species (those exceeding 40 tons) comes mainly from Patagonia. The record of super-sized titanosaur sauropods has traditionally been extremely fragmentary, although recent disc...
Conference Paper
Full-text available
Teeth with split carina is an uncommon trait recorded in archosaurs with ziphodont dentition (laterally compressed teeth bearing serrated margins). This condition has been reported in few theropod dinosaurs (Allosaurus, tyrannosaurids, dromaeosaurids and carcharodontosaurids) and in one Triassic phytosaur. Here, we report by the first time a split...
Article
Fossils from the Jurassic succession of the Neuquén Basin (Argentina) were analysed for their stable isotope (δ ¹³ C, δ ¹⁸ O) and elemental (Mg/Ca, Sr/Ca) composition. Mg/Ca ratios point to comparatively stable temperature conditions from the Bajocian to Early Oxfordian and during the Tithonian, but do not allow a reliable reconstruction of absolut...
Article
Full-text available
It is here presented the study of a collection of Upper Bathonian ammonites sampled bed-by-bed from a new section of Chacay Melehué (Neuquén Basin, Argentina). Most of the specimens are macroconch females moderately well preserved, belonging to the following genera: Oxycerites, Alcidellus, Choffatia, Neuqueniceras, Iniskinites, Stehnocephalites, Li...
Article
Dicraeosauridae is a family of small body-sized sauropod dinosaurs that diversified from the Middle Jurassic to the Lower Cretaceous, whose distinctive feature is a long dorsally projected, bifid neural spines in most of the presacral vertebrae. The dicraeosaurid fossil record is limited to few taxa, therefore each new finding, however fragmentary,...
Article
Full-text available
From the uppermost part of the Los Molles Formation (upper Lower and lower Middle Callovian) in Chacay Melehué (Neu-quén Province, Argentina), a group of hecticoceratine ammonites with a conspicuous morphology not assimilable to any known genus of this subfamily has been recently discovered. These forms are inflated oxycones with a prominent, sharp...
Article
Astrapotherium is the best-known member of the placental order Astrapotheria. This large herbivore inhabited the Patagonian ecosystems during early and middle Miocene times. The genus is widely represented in the early Miocene Santa Cruz Formation, with a dozen nominal species, of which Astrapotherium magnum and Astrapotherium burmeisteri are the o...
Article
Full-text available
A new collection of ammonites from the Picunleufuense Zone (standard base of the Andean Ti-thonian) of the locality Estancia María Juana (southern Neuquén Basin, Argentina) has provided abundant and well preserved material of new transients of Indansites picunleufuense and Choicensisphinctes platyconus. These transients are described and a detailed...
Conference Paper
En las últimas décadas se han registrado varios sitios con cáscaras, huevos, y nidos de dinosaurios en los bajos interiores de la provincia de Río Negro. En 2018 fueron hallados dos grupos de huevos en la localidad de Bajo Trapalcó (Río Negro). Los huevos se localizan en el yacimiento Garrido Inferior cerca del Puesto González (equivalente a los ya...
Article
Full-text available
Rebbachisaurids are a group of basal diplodocimorph sauropods that diversified in Gondwana at the end of the Early Cretaceous and the beginning of the Late Cretaceous. It is a group of great palaeobiogeographical interest, for it clearly illustrates various processes of dispersal throughout Gondwana and to Laurasia prior to the breakup of Africa an...
Article
Full-text available
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 recor...
Article
The ammonite fauna of the Tithonian–Berriasian of the Vaca Muerta Formation in Pampa Tril has been recently described in detail. New important specimens and additional information are presented in this paper. The phyletic evolution of Choicensisphinctes, passing from C. platyconus to C. erinoides is confirmed, as well as the sexual dimorphic corres...
Article
In this article we present a new peirosaurid crocodyliform: Kinesuchus overoi gen. et sp. nov. The specimen was recovered from the Bajo de la Carpa Formation (Santonian, Upper Cretaceous) and is composed of an incomplete mandible consisting of dentaries, splenials, and portion of the left surangular. The specimen shares some features with the peiro...
Article
Full-text available
Rionegrochelys caldieroi de la Fuente, Maniel, and Jannello gen. et sp. nov. is a Late Cretaceous turtle from Rio Negro Province, Argentina. The holotype and the referred specimens of this new species show an unusual shell morphology and microanatomy. The proportion between the carapace and plastron and the peculiar morphology of the shell such as...
Article
Full-text available
Titanosauria was the most diverse and successful lineage of sauropod dinosaurs. This clade had its major radiation during the middle Early Cretaceous and survived up to the end of that period. Among sauropods, this lineage has the most disparate values of body mass, including the smallest and largest sauropods known. Although recent findings have i...
Article
The recent recognition of the earliest Andean Tithonian ammonite fauna (Picunleufuense Zone) has allowed a balanced classification of the ataxioceratid ammonites, reflecting their phylogenetic relationships. The Picunleufuense Zone fauna, first recognized in the Neuquén Basin at the base of the Vaca Muerta Formation, is represented by numerous reco...
Article
In the last decades, the Argentinian ornithopod record has been increased with new and diverse bone remains found along all the Upper Cretaceous. Most of them are very incomplete and represent taxa of different size. As result, the studies about the palaeobiodiversity of the Ornithopoda clade in South America are complex. In this paper, new postcra...
Article
The complete osteology of the abelisaurid Viavenator exxoni, from the Bajo de la Carpa Formation (Santonian, Upper Cretaceous) is described. Viavenator is characterized by a series of autapomorphies, including: transversely compressed parietal depressions on both sides of the supraoccipital crest; ventral edges of the paraoccipital processes locate...
Article
Full-text available
We describe a new species of an ornithischian dinosaur, Isaberrysaura mollensis gen. et sp. nov. The specimen, consisting in an almost complete skull and incomplete postcranium was collected from the marine-deltaic deposits of the Los Molles Formation (Toarcian-Bajocian), being the first reported dinosaur for this unit, one of the oldest from Neuqu...
Article
Abstract: Adetailed lithostratigraphic study of the Quintuco Fm in the Cerro Mallín Quemado area (Sierra de la Vaca Muerta) has provided the opportunity to review the conflictive diversity of interpretations proposed in the last 40 years for this unit. In the study area the Quintuco Fm shows a heterolithic succession about 80 m-thick. This successi...
Conference Paper
Full-text available
La Formación Huayquerías se expone sobre el frente oriental de la Cordillera Frontal mendocina, Dpto. de San Carlos, Argentina. Su escasa asociación faunística fue la base para determinar la edad Huayqueriense, una de las más frecuentemente citadas para el Neógeno sudamericano. El objetivo de este trabajo es contribuir a la estratigrafía, paleoambi...
Article
Ornithopods are the least known dinosaurs within the Upper Cretaceous record of Argentina. For this reason every new record is very important to know their evolution in South America. Here, we describe a new remain of an indeterminate ornithopod recovered in the Petrobrasaurus quarry of the Puesto Hernández area, northeastern Neuquén province (Arge...
Conference Paper
Full-text available
Resumen Este trabajo es parte del estudio " Hidrogeología del acuífero de la ciudad de Zapala " llevado a cabo a partir de un convenio entre la Universidad Nacional del Sur y el Municipio de Zapala. El recurso hídrico subterráneo es el único disponible de la zona del cual se abastece la población, de allí su vital importancia. El objetivo general d...
Article
En el presente trabajo se da a conocer una nueva asociación de dientes de la Formación bajo de la Carpa (Santoniense, Cretácico Superior) en un contexto paleoambiental diferente a las registradas en los alrededores de la ciudad de Neuquén y Paso Córdova (Patagonia, Argentina). Esta nueva asociación está integrada por dientes aislados de Dipnoi de l...
Conference Paper
El registro de dinosaurios terópodos identificados para la Formación Bajo de la Carpa (Santoniano, Cretácico Superior), corresponden a diversos restos de abelisauroideos (Velocisaurus unicus Bonaparte, una pelvis completa, una vértebra caudal y un nuevo espécimen casi completo recientemente descubierto), una tibia de un terópodo indeterminado, rest...
Article
The Puesto Díaz Quarry (Lohan Cura Formation, Lower Cretaceous of Neuquén Basin, Argentina) consists of a monospecific dinosaur bone assemblage that includes 126 specimens from, at least, three individuals of the rebbachisaurid sauropod Comahuesaurus windhauseni. The bonebed was originated as a debris flow of an ephemeral-river bed, in distal areas...
Article
Full-text available
A well exposed section of the La Manga Formation in the locality Vega de la Veranada (north of the Neuquén Province, Argentina), sampled bed-by-bed, has provided a diverse ammonite fauna. This fauna indicates an age range comprising the Lamberti to Cordatum zones, older than concluded in previous studies by different authors. There have been identi...
Article
The lithographic limestones of the Los Catutos Member (Vaca Muerta Formation, Neuquén Province, Argentina) (late middle–early late Tithonian) bear a great diversity of marine reptiles. These deposits are unique in the Southern Hemisphere as the record of lithographic limestones from the Upper Jurassic is restricted to the Northern Hemisphere, parti...
Article
In this contribution, a fossil tooth assemblage from the Bajo de la Carpa Formation (Santonian, Upper Cretaceous) in a different paleoenvironmental context from that recorded at the Neuquen city and Paso Cordova localities (Patagonia, Argentina), is here presented. It includes isolated teeth of Dipnoi, represented by the species Ceratodus kaopen an...
Article
Full-text available
We describe a new toxodontid species, Nesodon taweretus sp. nov., from the Aisol Formation in Mendoza Province, central-west Argentina. Nesodon is a frequently found Toxodontidae, member of the Notoungulata, an extinct endemic group of Cenozoic South American mammals that are ecologically similar to current hoofed ungulates. The holotype of N. tawe...
Article
Full-text available
The stratigraphy and the ammonite fauna of the Vaca Muerta and Picun Leufu formations outcropping along the transect Portada Covunco-Cerrito Caracoles (south-central Neuquen Basin) were studied by means of two representative sections. The detailed study of the lithological succession of the two sections has allowed to complete the formal subdivisio...
Data
Resumen. Se describen osteodermos de un nuevo ejemplar de crocodyliforme hallado en un afloramiento correspondiente a niveles de la Formación Plottier (Coniaciano tardío) de la localidad de Puesto Hernández, en inmediaciones de la localidad de Rincón de los Sauces, Pro-vincia del Neuquén. Los osteodermos estudiados, que son parte del material halla...
Article
Full-text available
MORPHOLOGY AND HISTOLOGY OF OSTEODERMS FROM A PEIROSAURID FROM THE NEUQUEN BASIN. Osteoderms of a new crocodyliform specimen recovered from the Puesto Hernández locality are described here, found in sediments of the Plottier Formation (late Coniacian), near Rincón de los Sauces city, Neuquén Province. The studied osteoderms, that are part of the as...
Article
Full-text available
RECORD OF AN AEOLOSAURINI DINOSAUR (SAUROPODA, TITANOSAURIA) IN THE UPPER CRETACEOUS (PLOTTIER FORMATION) OF NORTHERN NEUQUEN PROVINCE, ARGENTINA, AND COMMENTS ON THE SOUTH AMERICAN AEOLOSAURINI. The clade Aeolosaurini is represented by several specimens found, so far, only in Argentina and Brazil. The material reported here corresponds to a saurop...
Article
Full-text available
Despite that the origin of rebbachisaurids is retrieved as Late Jurassic is not until the upper Lower Cretaceous that this group can be recognised in the fossil record. The group is geographically restricted to Gondwana and Europe, and is particularly diverse in the lower Upper Cretaceous of South America. In this subcontinent, Early Cretaceous for...
Article
Full-text available
La provincia del Neuquén es una de las regiones cársticas más importantes del país ya que posee el cavernamiento en roca caliza más grande, el sistema Cuchillo Curá. Su extenso desarrollo y sus características espeleogenéticas motivaron los estudios exploratorios que al momento arrojaron 111 cavidades topografiadas. Estas incluyen cavernas generada...
Article
Full-text available
Se presentan los recientes avances en el conocimiento de la estratigrafía y la edad de las unidades volcano-sedimentarias cenozoicas expuestas en el área de sierra de Huantraico-sierra Negra y cerro Villegas (Departamento Pehuenches, provincia del Neuquén, Argentina). Los análisis estratigráficos y de los restos fósiles hallados permiten reconocer...