A5079446236- Evolution and Paleontology Studies
- Wildlife Ecology and Conservation
- Bat Biology and Ecology Studies
- Species Distribution and Climate Change
- Animal Ecology and Behavior Studies
- Pleistocene-Era Hominins and Archaeology
- Mollusks and Parasites Studies
- Ecology and biodiversity studies
- Morphological variations and asymmetry
- Amphibian and Reptile Biology
- Paleontology and Evolutionary Biology
- dental development and anomalies
- Turtle Biology and Conservation
- Parasitic infections in humans and animals
- Ophthalmology and Visual Impairment Studies
- Parasite Biology and Host Interactions
- Zoonotic diseases and public health
- Scarabaeidae Beetle Taxonomy and Biogeography
- Corneal surgery and disorders
- Glaucoma and retinal disorders
- Freshwater macroinvertebrate diversity and ecology
- Insect Utilization and Effects
- Nail Diseases and Treatments
- Land Use and Ecosystem Services
- Tardigrade Biology and Ecology
Consejo Nacional de Investigaciones Científicas y Técnicas
2016-2025
National University of Patagonia San Juan Bosco
2014-2025
Centro de Investigación y Extensión Forestal Andino Patagónico
2016-2025
International Union for Conservation of Nature
2024
HEC Montréal
2023
Centro Científico Tecnológico - La Plata
2018
Centro Científico Tecnológico - Tucumán
2007-2014
Unidades Centrales Científico-Técnicas
2008
Universidad Abierta
2008
Center for the Study of State and Society
2008
Two new fossil mammal localities from the Paleogene of central-western Patagonia are preliminarily described as basis for a possible biochronological unit early Eocene Patagonia, correlated being between two conventional SALMAs, Riochican (older) and Vacan subage Casamayoran SALMA. The mammal-bearing strata belong to Middle Chubut River Volcanic-Pyroclastic Complex (northwestern Province, Argentina), Paleocene-Eocene age. This complex includes variety volcaniclastic, intrusive, pyroclastic,...
We created a database of lost and rediscovered tetrapod species, identified patterns in their distribution factors influencing rediscovery. Tetrapod species are being at faster rate than they rediscovered, due to slowing rates rediscovery for amphibians, birds mammals, rapid loss reptiles. Finding preventing future losses should therefore be conservation priority. By comparing the taxonomic spatial we have regions taxa with many comparison those that been rediscovered-our results may help...
Abstract Marmosa rapposa and Thylamys sponsorius were captured in syntopy the locality of Isla de Cañas Salta province, Argentina. We studied stomach contents 7 M. 10 T. identified arthropods plant material as main items. Niche overlap was using Pianka index. found that most abundant items both species (67 % , 63.5 ), represented 29.6 35.5 %, respectively. Insects item (45 58.5 while spiders more diet (21.7 vs. 5 ). The dietary between two high (91.1 %); a similar result males females (74.2...
The Plecoptera taxonomy in Patagonia is well-documented, yet their distribution remains poorly understood, hindering comprehensive ecological and biogeographical studies. This study enhances knowledge of stonefly two Patagonian national parks: Nahuel Huapi Los Alerces. Extensive fieldwork, georeferenced species records, geographic information system data integration were conducted. Species richness was calculated using polygons (0.1° x 0.1° pixels) across ecoregions, with indexed from rare...
Occurrence records represent the key to understanding species distribution patterns. I analyzed historical and geographical occurrence of Dromiciops gliroides, a marsupial endemic temperate rain forests southern Chile Argentina sole living representative order Microbiotheria. Eighty-eight localities spanning 7°31′ latitude (∼850 km) 3°13′ longitude (∼350 are known for were taken from previous works museum specimens integrated in geographic information system. Species was historical,...
The diversity of items consumed by modern didelphids, varying from mostly fruits in Caluromys Allen to small vertebrates Lutreolina O. Thomas, may cause changes molar size and shape. We evaluated the morphometric variation first third upper lower molars 16 genera didelphid marsupials, with aim assessing relationship between shape change, diet phylogeny. used a geometric approach analyse how diet. mapped onto phylogeny group reconstruct ancestral states evolution Finally, we statistically...
The genus Dromiciops Thomas is the only living representative of order Microbiotheria. Throughout history taxon, it was considered to comprise a continental and an insular form (D. australis D. gliroides), single species or, as recently described, 3 different bozinovici, mondaca, gliroides). I analyzed morphometric morphologic variability (differences in morphological characters within sample or species) variation among samples Dromiciops. Comparisons test for secondary sexual dimorphism...
Caenolestids are a group of poorly known South American marsupials with restricted distribution in páramo and subpáramo environments the Andes from Colombia western Venezuela to Bolivia (represented by genera Caenolestes Lestoros), Valdivian rain forest southern Chile Argentina where single species (Rhyncholestes raphanurus) lives. The Incan shrew opossum, Lestoros inca, lives mountains Peru extreme northwestern Bolivia. Despite being common trapping surveys, little is its cranial dental...
Abstract New World Marsupials (NWMs) comprise over 135 species ranging from Patagonia (Argentina) to northern North America, classified within the orders Didelphimorphia, Microbiotheria and Paucituberculata. This study examines recent taxonomic revisions conservation priorities for NWMs, based on IUCN Red List assessments current literature. NWMs are included in following categories: 2 (1.5%) Critically Endangered (CR), 9 (6.6%) Vulnerable (VU), 7 (5.1%) Near Threatened (NT), 15 (11%) Data...
Abstract The genus Ctenomys is represented by 68 species within at least 9 groups. In Patagonia, there are 11 described of in 3 phylogenetic groups: (1) the sociabilis group; (2) magellanicus and (3) mendocinus group—added to this C. maulinus, which not clearly related any group. group most representative Patagonia includes 6 species, several unnamed forms, has a widespread distribution from Río Negro Neuquén provinces north Tierra del Fuego province south. highly supported clade comprises...
The Patagonian opossum, Lestodelphys halli, is known from a few skeletons of captured animals and several isolated fragments recovered owl pellets in Argentina. Recently, more than 300 remains (mandibles, maxillae, crania, other bones) were found associated bones, comprising the largest collection L. halli. A detailed morphological analysis craniomandibular dental variation reported comparisons with small didelphids also are made. Intraspecific discussed differential diagnosis species presented.
The Chilean shrew opossum (Rhyncholestes raphanurus) is the southernmost representative of family Caenolestidae (Marsupialia : Paucituberculata). species lives in temperate forests southern Chile and Argentina currently known from <25 localities, spanning a latitudinal longitudinal range 2°44′ (~320 km) 2°20′ (~190 km), respectively. Species distribution was analysed historical, geographic biogeographic context, with use maps at different scales (region, subregion, province, ecoregion,...
The Patagonian opossum (Lestodelphys halli), the southernmost living marsupial, inhabits dry and open environments, mainly in steppe (between ~32 °S ~49 °S). Its rich fossil record shows its occurrence further north Central Argentina during Quaternary. paleoenvironmental meaning of past distribution L. halli has been mostly addressed a subjective framework without an explicit connection with climatic "space" currently occupied by this animal. Here, we assessed potential species changes...
The presence of extra teeth, defined as the teeth in excess normal expected number any dental arcades, has been reported for nearly all orders extant mammals (among ...
Robust evaluation of the impact biodiversity conservation actions is important not only for ensuring that strategies are effective and maximise return on investment, but also to identify celebrate successful strategies. This can be retrospective (comparing current situation a counterfactual scenario) or forward-looking future scenarios with without conservation). However, assessment using experimental quasi-experimental designs typically difficult in conservation, so rigorous inferential...
We describe the behavior in captivity of rare Patagonian opossum (Lestodelphys halli) from five individuals captured at three localities, which were kept alive glass terraria for different periods time (between 2.5–3.5 months). During our observations we found that L. halli can climb and jump well, has a prehensile tail-tip hold body suspended several seconds, powerful grasping hind feet ability to dig. Feeding preferences meat (mainly raw) live animals (i.e., mice, lizards beetles) over...
Abstract We describe the behavior in captivity of dusky shrew-opossum Caenolestes fuliginosus from 17 specimens captured at Finca La Martinica (Colombia), which were kept alive plastic terraria for different periods time (between 1 and 12 consecutive days). found that C. can climb jump well uses its nonprehensile tail as a support when climbing. Feeding observations showed preference towards an animalivorous diet, included moths/butterflies (Insecta, Lepidoptera), stick-insects...
The middle to late Miocene Friasian sensu stricto, Colloncuran and Mayoan South American Land Mammal Ages (SALMAs) were established based on the mammals recovered from Río Frías, Collón Curá Mayo formations, respectively (southern Argentina Chile). Records of Interatheriinae (Notoungulata) these sediments have been known since first contributions Ameghino Roth, but most this material has only superficially revised or is almost unstudied. Based old collections new interatheriine records Cerro...