Edgardo Ortiz-Jaureguizar

• Dr. in Natural Sciences / Full Professor (Mammalogy)
• Head at National University of La Plata

Resumen: El objetivo de esta ponencia es identificar el comportamiento de los paleontólogos argentinos al establecer en qué revistas generalistas de paleontología publican sus documentos, comparándolo con el de colegas de otros países. Para el lapso 2012-2022, se seleccionaron los países con revistas generalistas de paleontología, pertenecientes a...

Scientometrics has traditionally examined place in terms of author affiliations and, as such, has tended to overlook the more detailed use of geographical data in scholarly publications to design indicators of the scientific literature. This study constructs a comprehensive framework to formalize and unify the Scientometrics analysis of places (Spa...

Resumen: El objetivo de esta contribución es estudiar la situación de las mujeres en la ciencia argentina, específicamente en el campo de la paleontología, a partir de un estudio cuantitativo de género basado en la distribución de las firmas de los documentos publicados en la Revista del Museo de La Plata durante el lapso 1930-2022. Por medio del m...

Debido a que en 2020 iban a cumplirse los 130 años del primer número de la Revista del Museo de La Plata (RMLP), desde el equipo editorial decidimos convocar a quienes en ese entonces se desempeñaban como Jefes de División del Museo de La Plata, para invitarlos a escribir un artículo que conmemorase dicha fecha. En la reuniones que realizamos, se d...

The terrestrial mammal diversity recovered from levels of Banco Negro Inferior (Lower Black Bank) at Punta Peligro and surrounding areas, in southeastern Chubut Province (Argentina) is detailed. Most of the metatherian taxa here described are new for this mammalian assemblage, which in turn is the base of the late Danian (early Paleocene, Peligran...

This contribution aims to study the situation of women in Argentine science, particularly in the field of mammalogy, from a quantitative study of gender based on the distribution of the signatures of the works published in the journal Mastozoología Neotropical from 1994 to 2020. Through the descriptive bibliometric method, the distribution and evol...

El objetivo de esta ponencia es evaluar la congruencia existente entre los indicadores bibliométricos del portal Scimago Journal and Country Rank (SCIJCR) cuando se aplican a revistas de diferentes disciplinas científicas. Las unidades de estudio fueron los 17 indicadores de SCIJCR. Parar el análisis se consideraron 35 revistas generalistas, 12 de...

Resumen: El objetivo de este estudio es evaluar la congruencia existente entre las clasificaciones de países obtenidas a partir de los indicadores de Scimago Journal and Country Rank .SCIJCR) y aquellos provistos por la RICYT, tomando como unidades de estudio 11 países iberoamericanos, durante el lapso 2006-2017. Como variables se tomaron 34 indica...

Trece revistas generalistas de antropología, seleccionadas entre las listadas en el portal Scimago Journal and Country Rank, han sido estudiadas con una metodología bibliométrica. Los objetivos fueron: a) analizar las relaciones de similitud entre las revistas; b) analizar las relaciones de similitud entre los indicadores bibliométricos; y c) estab...

Este capítulo forma parte de un texto de divulgación destinado principalmente a los estudiantes de nivel secundario de la provincia de Santa Cuz (Argentina) en el cual se abordan diferentes aspectos relacionados con los fósiles y la paleoecología de la Formación Santa Cruz (Mioceno). En particular, en este capítulo sintetizamos la información más r...

Women in Science: Authorship analysis in the Revista Argentina de Antropología Biológica (1996-2010) The objective of this paper is to study the situation of women in Argentine science, especially in the field of antropology, through a quantitative study of gender, based on the distribution of the signatures of the papers published in the Revista A...

Estudio bibliométrico de la producción científica sobre el Palezoico Superior en Ameghiniana (1957-2016). El objetivo de este estudio es analizar los estudios paleontológicos sobre el Paleozoico Superior publicados en la revista Ameghiniana (1957-2016). Se cuantificaron aspectos como el número de trabajos publicados, número de autores por trabajo,...

El objetivo de este estudio es determinar si existe información común entre los indicadores bibliométricos de ScimagoJournal and Country Rank (SCIJCR) y los indicadores de contexto, graduación superior, insumo y bibliométricos provistos por la Red de Indicadores de Ciencia y Tecnología -Iberoamericana e Interamericana- (RICYT), tomando como unidade...

The Eocene-Oligocene boundary (EOB) marks a period of remodeling in the metatherian faunas of South America. Paucituberculata was one of the groups that successfully diversified as the climate and environment conditions changed, and they became, during the first part of the Neogene, an important component of micromammal assemblages. Among paucitube...

Preferences of researchers and institutional/disciplinary practices in the dissemination and socialisation of research results. The objective of this work is to contribute to the knowledge of the practices and preferences of university researchers when they have to disseminate and socialize their publications in open access institutional repositori...

In the last three decades, records of tribosphenidan mammalsfrom India, continental Africa, Madagascar and South Americahave challenged the notion of a strictly Laurasian distributionof the group during the Cretaceous. Here, we describe a lowerpremolar from the Late Cretaceous Adamantina Formation, SãoPaulo State, Brazil. It differs from all known...

Reseña de la actividad científica y docente del botánico argentino Jorge Víctor Crisci. Review of the research and educational activity of the Argentine botanist Jorge Víctor Crisci

This study shows the presence of the community of university full time researchers of three Faculties of the Universidad Nacional de La Plata (Argentina) in the local institutional repositories and the social network ResearchGate. The study describes and analyzes the volume and temporal coverage of the scientific production of the three communities...

Los objetivos de este trabajo son: (1) determinar el valor de las variables analizadas para discriminar la producción científica de los países; y (2) establecer las relaciones de similitud entre los países, con especial énfasis en la situación relativa de Argentina. Para el análisis se utilizó SCImago Journal & Country Rank (SCIJCR) que ofrece, a p...

Hace unos días, Jorge nos preguntó si queríamos escribir para esta revista una semblanza que sirviese de introducción a la reseña que ustedes van a encontrar unas páginas más abajo. Para ello, usó una de las palabras que mejor describen su más profunda esencia: pudor. “Me da pudor pedirles esto”, nos dijo, y en su voz y en sus ojos se trasuntaba ab...

Semblanza del botánico y biogeógrafo argentino Jorge V. Crisci / Biographical sketch of the Argentine botanist and biogeographer Jorge V. Crisci (in Spanish)

El objetivo de este trabajo es analizar la evolución de la paleontología de los vertebrados en Argentina, tomando como fuente la revista Ameghiniana. Utilizando todos los documentos sobre paleontología de los vertebrados publicados en dicha revista en el período 1957-2014, se cuantificaron aspectos como el número de trabajos publicados, el número d...

En este artículo el estudio de la paleomastozoología, es decir, la rama de la paleontología que se ocupa de estudiar los mamíferos. A diferencia del enfoque seguido en los trabajos previos, en esta oportunidad el foco no está puesto en los cultores de la disciplina ni tampoco en lo publicado por ellos en alguna revista científca de la especialidad;...

Os objetivos deste capítulo são: (1) descrever as principais mudanças ocorridas na América do Sul austral, que resultaram na atual diferenciação da região Andina e seus componentes bióticos, e (2) exemplificar como a biogeografia histórica possibilita compreender esses fenômenos a partir da informação dos padrões de distribuição dos táxons atuais....

No es la primera vez que esta publicación muta y se reconfigura. Desde sus orígenes en 1890 la Revista del Museo de La Plata (RMLP) ha recibido diversos nombres y formatos. En este Editorial hemos realizado una breve síntesis de la historia (en números) de las publicaciones del Museo de La Plata y los principales acontecimientos que, desde el inici...

Recientes normativas sobre el contenido y forma de mencionarla afiliación institucional de los investigadores de dos de las principales instituciones públicas de investigación de Argentina (la Universidad Nacional de La Plata y el Consejo Nacional de Investigaciones Científicas y Técnicas)obligan a reflexionar sobre problemas recurrentes y nuevas t...

Los objetivos de este trabajo son: (1) analizar las relaciones de similitud de los indicadores bibliométricos; y (2) estudiar el valor de estos para discriminar/agrupar revistas científicas. Como unidades de estudio se utilizaron los 15 indicadores brindados por SCImago Journal Rank (SCImagoJR), aplicados a las 11 revistas paleontológicas generalis...

El trabajo realiza una revisión de la literatura académica sobre altmetrías publicada en revistas internacionales indizadas en Scopus abarcando el período 2010-2014. En primer lugar se presenta un análisis bibliométrico con el objetivo de identificar el volumen de la producción, así como los principales autores, revistas, instituciones, y conceptos...

The objective of this work is to assess gender distribution differences in authorship of papers in the field of vertebrate paleontology published in the Argentine journal Ameghiniana from 1957 to 2011. The bibliometric method was used to analyze gender distribution and evolution of the signing authors, their productivity, geographical origin, autho...

Pocos días antes de las festas de Navidad y Año Nuevo del pasado año, la comunidad científca nacional e internacional recibió con consternación y dolor la noticia de que el 23 de diciembre había fallecido en la ciudad de La Plata, a los 87 años de edad, el Dr. Rosendo Pascual. Fue Investigador Superior del CONICET, Jefe de la División Paleontología...

The objective of this work is to assess gender distribution differences in authorship of papers in the field of Vertebrate Paleontology published in the Argentine journal Ameghiniana from 1957 to 2011. The bibliometric method was used to analyze gender distribution and evolution of the signing authors, their productivity, geographical origin, autho...

Pocos días antes de las festas de Navidad y Año Nuevo del pasado año, la comunidad científca nacional e internacional recibió con consternación y dolor la noticia de que el 23 de diciembre había fallecido en la ciudad de La Plata, a los 87 años de edad, el Dr. Rosendo Pascual. Fue Investigador Superior del CONICET, Jefe de la División Paleontología...

Dental and cranial appendage remains of Cervidae from the fossil site of Dorn-Dürkheim are studied in detail. The material mainly includes isolated teeth, isolated pedicles and antler pieces. Neither tooth rows nor complete appendages are recorded. Comparative morphology and statistics of morphometrics (principal component analysis and discriminant...

It has been argued that historical biogeography, the study of how processes that occur over long periods of time influence the distribution of life forms, is in the midst of a scientific revolution. The aim of this paper is to analyze the evolution of historical biogeography during the first decade of the 21st century and to identify major trends f...

This chapter presents a paleoecological analysis of non-carnivorous Santacrucian marsupials of the orders Paucituberculata and Microbiotheria. Different ecological niches are inferred from estimates of body mass, diet, and locomotor behavior. Body masses were estimated using a regression analysis from living marsupials. Possible dietary preferences...

The Punta Peligro fauna includes some of the oldest Cenozoic South American mammals, and the oldest ones for Patagonia. In addition to frogs, turtles, and crocodiles, an unusual mammalian assemblage is formed by a mixture of Mesozoic lineages of Gondwanan origin and therians (eutherians and metatherians) derived from Laurasian immigrants. This pape...

The objective of this paper is to reply the recent comments on our papers made by Cozzuol et al. (2011) about the phylogeny and biogeography of South American Gomphotheres. We addressed the methodological criticism and concluded that Sinomastodon is the sister group of the South American gomphotheres, as we originally proposed, despite the weightin...

The similarity degree of chemical, ionizing radiation, and combined treatments of chemical plus ionizing radiation in their capacity to induce reciprocal translocations was analyzed by means of multivariate analysis techniques on mice germ cells. The effect of three different doses of gamma rays, four doses of X-rays, and different doses of adriamy...

The objective of our paper was to analyze the distributional patterns of trilophodont gomphotheres, applying an event-based biogeographic method. We have attempted to interpret the biogeographical history of trilophodont gomphotheres in the context of the geological evolution of the continents they inhabited during the Cenozoic. To reconstruct this...

The objective of our paper was to analyze the distributional patterns of trilophodont gomphotheres, applying an event–based biogeographic method. We have attempted to interpret the biogeographical history of trilophodont gomphotheres in the context of the geological evolution of the continents they inhabited during the Cenozoic. To reconstruct this...

According to the fossil record, a biotic interchange of land vertebrates (e.g. booid snakes, dinosaurs and mammals) occurred between the Americas during the Late Cretaceous-Early Palaeocene. The arrival of North American immigrants (particularly marsupials and placentals) during the latest Cretaceous-earliest Palaeocene had a profound influence on...

A recent internet search revealed the homonymy of the generic name Notolophus, proposed by Bond, Reguero, Vizcaíno, and Marenssi (2006: 166) for an Early Eocene-Late Eocene Antarctic sparnotheriodontid litoptern. We propose the replacement name Notiolofos.

Using the extant information of the complete fauna of South American terrestrial mammals we proved the Vrba’s resource-use hypothesis, which predicts that speciation and extinction rates are lower in generalist species than specialist. We used the biomic specialization index (BSI) for each species, which is based on its geographical distribution wi...

En este trabajo se pone de manifiesto que el proceso de integración y desarrollo de la fauna de mamíferos de América del Sur está íntimamente vinculado con los eventos geodinámicos que afectaron al continente durante el lapso Jurásico Medio-Superior y la Actualidad. Estos eventos modelaron la geografía del continente y, de este modo, dirigieron los...

Background: This paper tests Vrba's resource-use hypothesis, which predicts that generalist species have lower specialization and extinction rates than specialists, using the 879 species of South American mammals. We tested several predictions about this hypothesis using the biomic specialization index (BSI) for each species, which is based on its...

The Caribbean Region has played a crucial role in the biogeography and evolution of North and South American faunas. According to the fossil record, an interchange of vertebrates occurred during the Late Cretaceous-Early Paleocene. The arrival of North American immigrants (particularly therians) during latest Cretaceous-earliest Paleocene had a rad...

The Punta Peligro fauna includes some of the oldest Cenozoic South American mammals, and the oldest ones for Patagonia. In addition to frogs, turtles, and crocodiles, an unusual mammalian assemblage is formed by a mixture of Mesozoic lineages of Gondwanan origin and therians (eutherians and metatherians) derived from Laurasian immigrants. This pape...

The first steps in the history of South American mammals took place ca. 130Ma., when the South American plate, still connected to the Antarctic Peninsula, began to drift away from the African-Indian plate. Most of the Mesozoic history of South American mammals is still unknown, and we only have a few enigmatic taxa (i.e., a Jurassic Australosphenid...

We describe a Cretaceous ?cimolodontan multituberculate p4 from South America, for which we erect the new genus and species Argentodites coloniensis. This new taxon is represented by an isolated ?left p4, from the Upper Cretaceous (?Campanian or Maastrichtian) La Colonia Formation of Patagonia (Fig. 1). It has a strongly convex anterior margin and...

Ameghiniana was created 50 years ago. During this lapse, the late Cenozoic paleomastozoology developed exponentially in Argentina. Many of the papers dealed with systematics. However, fossil mammals were also used for establish the chronological scale based on a biostratigraphic sequence of faunas mainly from the Pampean area. This scale proved val...

The Punta Peligro fauna includes some of the oldest Cenozoic South American mammals, and the oldest ones for Patagonia. In addition to frogs, turtles, and crocodiles, an unusual mammalian assemblage is formed by a mixture of Mesozoic lineages of Gondwanan origin and therians (eutherians and metatherians) derived from Laurasian immigrants. This pape...

Sexual dimorphism and morphometric geographic variability of Hybreoleptops aureosignatus (lnsecta: Coleoptera: Cuxculionidae). Abstract: The single most important quantitative variable in animals is, perhaps, body size variability. Body size variability has a great influence on so diverse biological questions as corporal architecture, physiology,...

In the last 50 years, several causes contributed to increase the knowledge of Paleogene continental mammals in Argentina. Among them, the efforts focused in prospecting new localities, the increasing amount of re-searchers and the application of new techniques are the most important. The interest of paleontologists in these subjects is reflected in...

Local mammalian communities in Africa present the highest species richness in the world, only paralleled by some communities in the Oriental biogeographic region. Differences in mammalian species richness are especially outstanding when compared with South American communities, despite their similar latitudinal position and regional species richnes...

Los Proterotheriidae han sido registrados desde el Paleoceno Superior hasta el Holoceno [«Edadesmamífero (= SALMAs) Itaboraiense-Lujanense]. Son mayoritariamente braquiodontes, cursoriales, de tamaño pequeño a mediano, que muestran una temprana tendencia hacia la monodactilia. Los objetivos del presente trabajo son: 1) analizar los cambios en la di...

Southern South America (SSA) has today a high diversity of climates, environments, biomes, and biotas, as a result of the complex interaction through time of plants and animals with the geological forces (e.g. plate tectonics, sea-level changes, glaciations) that modulated the geography of the continent. Arid biomes are well represented in SSA toda...

The Proterotheriidae have been recorded from Upper Paleocene until Holocene [«Land-mammal Ages» (= SALMAs) Itaboraian-Lujanian]. They are mainly braquiodonts, with cursorial habits, small to medium sized, and an early tendency toward the monodactily. The objectives of this paper are: 1) to analyze the changes in the diversity and faunistic exchange...

The fossil remains of the mammal deposit known as the "Gran Hondonada" (Sarmiento Fm., Mustersan "land-mammal age") were found in sediments of fluvial channels, disjointed, without transport evidence, and chaotically deposited. The taphonomic study was made on 1539 remains, 65% of which were determined. Most of the fossil remains correspond to Isot...

The fossil remains of the mammal deposit known as the “Gran Hondonada” (Sarmiento Fm., Mustersan “Land-mammal Age”) were found in sediments of fluvial channels, disjointed, without transport evidence, and chaotically deposited. The taphonomic study was made on 1539 remains, 65% of which were determined. Most of the fossil remains correspond to Isot...

The weevil subtribe Listroderina belongs in the tribe Rhytirrhinini (subfamily Cyclominae), and has 25 genera and 300 species in the Americas. The distributional history of this subtribe was reconstructed applying dispersal-vicariance analysis (DIVA) using its genera as terminals. The results suggest that Listroderina originated within an area pres...

A partir del uso de técnicas de análisis multivariado, se presentan las relaciones de similitud de los tres géneros y las siete especies de Abderitidae, una extinta familia sudamericana de marsupiales con molariformes de tipo plagiaulacoideo. Asimismo, se discuten la paleoecología y las probables causas de extinción de estos marsupiales. Para el an...

Los objetivos del presente trabajo son: 1) inferir la masa corporal de los Hipparionini de la península ibérica. y 2) enmarcar el patrón de cambios en la masa corporal dentro de la evolución climático-ambiental de la península ibérica durante el lapso Mioceno superior-Plioceno superior. La masa corporal se estimó a partir del ancho de la superficie...

The Jurassic period is an important stage in early mammalian evolution, as it saw the first diversification of this group, leading to the stem lineages of monotremes and modern therian mammals. However, the fossil record of Jurassic mammals is extremely poor, particularly in the southern continents. Jurassic mammals from Gondwanaland are so far onl...

The Jurassic period is an important stage in early mammalian evolution, as it saw the first diversification of this group, leading to the stem lineages of monotremes and modern therian mammals. However, the fossil record of Jurassic mammals is extremely poor, particularly in the southern continents. Jurassic mammals from Gondwanaland are so far onl...

In this letter we comment on two recent papers by Forsten (1998, 1999). In the former, the author discusses the possibility of using horse species as stratigraphic markers. The latter is a review of Equus stenonis forms, and also emphasises this approach. Both papers are very interesting since one of the most qualified specialists on fossil horses...

In this letter we comment on two recent papers by Forsten (1998, 1999). In the former, the author discusses the possibility of using horse species as stratigraphic markers. The latter is a review of Equus stenonis forms, and also emphasises this approach. Both papers are very interesting since one of the most qualified specialists on fossil horses...

The degree of similarity between chemical and physical agents in their capacity to induce reciprocal translocations was analyzed by means of multivariate analysis techniques. The effect of three different doses of gamma rays, four doses of X-rays and different doses of adriamycin, mitomycin C, thio-tepa and bleomycin was analyzed. Data were arrange...

The Gondwanatheria is an enigmatic group of mammals known from the Late Cretaceous and Paleocene of Argentina and the Late Cretaceous of Madagascar and India. Although originally believed to be edentates, it has been argued recently that gondwanatheres comprise a derived clade of multituberculates. Aside from two tentatively referred, fragmentary d...

En este trabajo se estudian la paleoecología y la evolución de la fauna de mamíferos de América del Sur durante la denominada «edad de las planicies australes», un período que abarca las «Edades-mamífero» Chasiquense, Huayqueriense, Montehermosense y Chapadmalalense. Para ello se consideran los cambios en la riqueza taxonómica, en las tasas de prim...

The taxonomy of the European stenonoid horses is revised using multivariate statistical techniques in this paper. The objectives are: to identify the taxonomic status of this group; to revise the specific and subspecific diagnoses, and the valid taxa; and to analyze their paleoecology and evolution. We conclude that: 1) there are six species among...

In this paper, the paleoecology and evolution of the South American land-mammal fauna during the 'Age of the Southern Plains' are studied. Chronologically, the 'Age of the Southern Plains' encompasses the Chasicoan, Huayquerian, Montehermosan and Chapadmalalan South American Land-Mammal Ages. Changes on the taxonomic richness, first and last appear...

The rise and fall of the Rionegran land-mammal fauna of the Rio Negro Formation (northern Patagonia), are related to the regression of the "Paranean" sea (Middle to Late Miocene), and to the environmental changes brought about by the Andean diastrophic Diaguita Phase (Late Pliocene). A new fission track age of 4.41 +/- 0.50 Ma has been obtained for...

La subfamilia Pichipilinae es un grupo monofilético que comprende tres géneros y seis especies de pequeños marsupiales extinguidos, que habitaron el extremo austral de América del Sur desde la «Edad-mamífero» Colhuehuapense (Mioceno temprano) hasta la Montehermosense (Plioceno tardío). Se realizó un análisis cladístico de los Pichipilinae empleando...

Cenozoic South American land mammals demonstrated to be the richest and most eloquent known testimonies to infer the geobiotic evolution of the continent throughout the geological span. The concept and practice followed to recognize by them the South American Land Mammal Ages (SALMAs) are explained. Likewise, it is explained the analytical method u...

The purpose of this paper is to outline the most recent advances in the knowledge of paleobiogeography and paleoecology of the South American continental mammals during the late Cretaceous-Paleocene span. Two basic parameters were considered: (1) taxonomic richness; and (2) trophic diversity. The genera recorded in the four «land-mammal Ages» (SA...

This paper outlines recent advances in the knowledge of paleobiogeography and paleoecology of the South American continental mammals during the late Cretaceous-Paleocene span. Two basic parameters were considered: 1) taxonomic richness; and 2) trophic diversity. The genera recorded in the four 'land-mammal Ages' (SALMAs) that represent the late Cre...

The importance of body mass prediction from several cranial, dental and appendicular variables in living Equini are studied. Relationships between the body mass changes and the ecogeographic picture of Equini evolution are also analysed. The metapodial and phalanx variables, particularly antero-posterior diameters, are better correlated with body m...

The importance of body mass prediction from several cranial, dental and appendicular variables in living Equini are studied. Relationships between the body mass changes and the ecogeographic picture of Equini evolution are also analysed. The metapodial and phalanx variables, particularly antero-posterior diameters, are better correlated with body m...