A5025365728- Evolution and Paleontology Studies
- Bat Biology and Ecology Studies
- Primate Behavior and Ecology
- Morphological variations and asymmetry
- Paleontology and Evolutionary Biology
- Wildlife Ecology and Conservation
- Pleistocene-Era Hominins and Archaeology
- Geology and Paleoclimatology Research
- Animal Ecology and Behavior Studies
- Comparative Animal Anatomy Studies
- Plant Diversity and Evolution
- Scarabaeidae Beetle Taxonomy and Biogeography
- Paleontology and Stratigraphy of Fossils
- Fish biology, ecology, and behavior
- Amphibian and Reptile Biology
- Functional Brain Connectivity Studies
- Genetics and Physical Performance
- Tardigrade Biology and Ecology
- Environmental and Cultural Studies in Latin America and Beyond
- Ecology and Vegetation Dynamics Studies
- Neural dynamics and brain function
- Fossil Insects in Amber
- dental development and anomalies
- Plant and animal studies
- Mollusks and Parasites Studies
Consejo Nacional de Investigaciones Científicas y Técnicas
2016-2025
Universidad Nacional de Córdoba
2021-2025
Centro Científico Tecnológico - San Juan
2023
Instituto de Química del Noroeste Argentino
2017-2019
Museo Nacional de Ciencias Naturales
2014
Although intense research effort is seeking to address which brain areas fire and connect each other produce complex behaviors in a few living primates, little known about their evolution, or facets of cognition were favored by natural selection. By developing statistical tools study the evolution cortex at fine scale, we found that rapid cortical expansion prefrontal region took place early on during primates. In anthropoids, fast-expanding extended posterior parietal cortex. Homo, further...
In the present work we conduct a comparative study of cranial and dental samples early machairodontine Machairodus aphanistus from Vallesian (MN 10) sites Batallones-1 Batallones-3 (Torrejón de Velasco, Madrid, Spain). These sites, which have yielded most abundant complete this felid, show interesting differences in faunal composition age, thus providing unique opportunity for both qualitative quantitative comparisons between two populations same species. The reveals number features,...
Tardigrade xenarthrans are today represented only by the two tree sloth genera Bradypus and Choloepus, which inhabit Neotropical rainforests characterized their slowness suspensory locomotion. Sloths have been recognized in South America since early Oligocene. This monophyletic group is five clades traditionally as families: Bradypodidae, Megalonychidae, Mylodontidae (†), Megatheriidae (†) Nothrotheriidae (†). A new nothrotheriid ground a dentary several postcranial elements, Aymaratherium...
Abstract The Huayquerian Stage of the South American chronostratigraphic scheme (named for Huayquerías del Este, Argentina) was originally based on a poorly known mammal association six taxa from Formation. We studied geology, age and fauna Neogene sequence in this area, including Huayquerías, Tunuyán Bajada Grande formations. comprises monotonous succession synorogenic epiclastic sediments deposited under arid to semi‐arid conditions. Zircon U–Pb dates 10 tuffaceous levels (7.2–1.6 Ma)...
Abstract We describe the new frog Telmatobius achachila sp. nov. from late Middle to earliest Late Miocene of Achiri, based on a partial skeleton found at 3960 m above sealevel in Bolivian Altiplano. This skeleton, attributed male adult, constitutes first documented fossil record speciose living genus , endemic Andean Cordillera and Phylogenetic analysis confirms species as being part crown group, diverging both later than T. verrucosus group earlier bolivianus marmoratus macrostomus groups....
ABSTRACT We compare two populations of the primitive saber-toothed felid Promegantereon ogygia from late Miocene (Vallesian, MN 10) Spain. These come fossil sites, Batallones-1 and Batallones-3, located very close to each other, within Cerro de los Batallones complex. The sites show differences in age their faunal assemblages, with being older than Batallones-3. find that population this latter site shows slightly derived characters both dentition postcranial elements, which clearly indicate...
New remains of a relatively plesiomorphic nothrotheriid sloth have been recovered from upper Miocene-aged deposits near the village Achiri in Altiplano Bolivia. The new specimens appear allied to other middle and late Miocene Argentina Bolivia that assigned pseudo-genus 'Xyophorus'. 'Xyophorus' has not previously recognised as distinct genus because paucity material it encompasses. specimens, however, include well-preserved squamosal with attached auditory region an isolated astragalus....
Studying dental ontogeny in mammals can provide valuable insight on the evolution of their masticatory apparatus and related adaptations. The multiple acquisitions a prolonged to continuous growth teeth herbivorous response high abrasion represent an intensively investigated issue. However, ontogenetic architectural patterns associated with these repeated innovations remain poorly known. Here, we focused two case studies corresponding distant mammalian clades, extinct Mesotheriidae...
Understanding the mechanisms responsible for phenotypic diversification, and associated underlying constraints ecological factors represents a central issue in evolutionary biology. Mammals present wide variety of sizes shapes, are characterized by high number morphological convergences that hypothesized to reflect similar environmental pressures. Extinct South American notoungulates evolved isolation from northern mammalian faunas highly disparate environments. They array skeletal...
Abstract Extinct terrestrial sloths are common elements of the late Cenozoic South American fossil record. Among them, Mylodontinae species were particularly abundant in Americas throughout Pleistocene epoch, and their anatomy is relatively well known. In contrast, less information available from Neogene record localities at low latitudes, with an additional considerable bias favour craniodental rather than postcranial remains. this contribution, we provide comparative descriptions several...
We report systematic conclusions based on critical analyses of previous taxon diagnoses and revisions the Early-Middle Pleistocene mesotheriine notoungulate Mesotherium cristatum, from Buenos Aires province, Argentina. cristatum is a key taxon, as it guide species Ensenadan Age (Early-Middle Pleistocene), typifies ‘Mesotherium Biozone’, last member Typotheria lineage. The taxonomic history its successive are especially complex due to lack recognition ontogenetic variation for this often...
In this paper, we study a sample of cranial, mandibular and dental remains two species the machairodontine felid genus Machairodus from Early Vallesian (MN 9, around 10 Ma) site Los Valles de Fuentidueña (Segovia, Spain): tiger-sized aphanistus, smaller more primitive M. alberdiae; which is only known site. The fossils these sympatric populations are compared with most abundant samples aphanistus Late 10), younger sites Batallones-1 Batallones-3 (Torrejón Velasco, Madrid, Spain). results...
Plant-insect interactions can provide extremely valuable information for reconstructing the oviposition behavior. We have studied about 1350 endophytic egg traces of coenagrionid damselflies (Odonata: Zygoptera) from Eocene, identifying triangular or drop-shaped scars associated with them. This study aims to determine origin these scars. Our behavioral 1,800 eggs recent coenagrionids indicates that were caused by ovipositor incisions, but without insertion. The scar correlates (χ2-test) leaf...
Mesotheriid taxonomy for Monte Hermoso, Buenos Aires province, Argentina is extremely complex, with much of the controversy centered on Late Miocene–Pliocene mesotheriine notoungulate type species Pseudotypotherium pulchrum, which a subjective junior synonym P. exiguum. Confusion around exiguum intraspecific variation exacerbated by specimens Pleistocene taxon Mesotherium cristatum originally defined in Toscas del Río de La Plata. As result, remains Hermoso mesotheres have been referred to...
Here, we report new autopodial material belonging to a scelidotheriine sloth from the Pliocene (Chapadmalalan) of Rio de La Cruz valley, Córdoba province, Argentina. The epiphyseal suture fusion in metacarpals III and IV indicates adult size; compared with other scelidotheriines, preserved bones are slightly larger than pre-Chapadmalalan taxa, but quite smaller post-Chapadmalalan taxa. metacarpal presents distal carina longer relative proximodistal length – proximalmost point proximal end...