A5024999222- Evolution and Paleontology Studies
- Animal Ecology and Behavior Studies
- Morphological variations and asymmetry
- Bat Biology and Ecology Studies
- Genetic diversity and population structure
- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Yersinia bacterium, plague, ectoparasites research
- dental development and anomalies
- Physiological and biochemical adaptations
- thermodynamics and calorimetric analyses
- Rabbits: Nutrition, Reproduction, Health
- Genomics and Phylogenetic Studies
- Wildlife Ecology and Conservation
Université Claude Bernard Lyon 1
2024
Institut de Génomique Fonctionnelle de Lyon
2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2019
Centro Científico Tecnológico - Tucumán
2019
Université de Montpellier
2015
Abstract Rhagomys is a genus of South American cricetids composed three living species. They occur in eastern Andean and lowland tropical forests. Since description this more than century ago, it was treated as an enigmatic form within Sigmodontinae, varyingly thought to be allied different suprageneric groups, with several scholars highlighting their presumptive autapomorphies. However, morphologically based controversy resolved the advent molecular data, indicating weak affiliation...
We propose a new nomenclatural system to study the occlusal pattern in Sigmodontine (Rodentia: Cricetidae) molars. The proposal is based on hypothesis that best understood as repetition of single basic cuspal area. Cuspal areas one side molar are mirror image, partly rotated, other side. With this system, morphology interpreted within consistent theory including cuspidogenesis and ontogeny. Our also shows some structures previous nomenclatures (e.g. median murid) do not correspond just...
Abstract New fossil material of Auliscomys formosus Reig 1978 allows restudy the oldest known South American representative subfamily Sigmodontinae. Description was based on a fragmentary dentary exhumed from Monte Hermoso Formation central Argentina. Previous studies allocated A. to early Pliocene. A reevaluation dental and cranial morphology, including for first time upper dentition, inclusion in phylogenetic analysis tribe Phyllotini indicate that represents new genus, Kraglievichimys ....
Abstract We studied the enlargement of upper third molar (M3), with respect to second in sigmodontine rodents, largest subfamily living cricetids. M3 is enlarged extant and extinct members at least six tribes (Andinomyini, Euneomyini, Oryzomyini, Phyllotini, Reithrodontini Sigmodontini), all them also sharing hypsodonty, planate crowns overall dental simplification context Sigmodontinae. Enlargement expressed four ways, including or modest complication occlusal design on a single plane....
Chukimys favaloroi, new genus and species, is added to the past diversity of sigmodontine rodents, largest subfamily Neotropical mammals. It based on a maxillary with entire tooth row both first second lower molars collected in sediments Brochero Formation (Late Pliocene) that crop out Córdoba Province, Argentina. The represents small rodent (about 40 g) has unique combination traits, including zygomatic plate deeply excavated anterior border conspicuous spine, incisive foramen reaching...
We described a fossil small mammal assemblage from La Mesada (2250 m), Tafí valley, Tucumán, Argentina, recovered levels referred to late Pleistocene – early Holocene. Gastric corrosion in bones and teeth indicates that the was generated by trophic activities of owls. The is composed 14 species rodents: 12 living (Abrothrix illutea, Akodon spegazzinii, Oxymycterus sp., Andinomys edax, Oligoryzomys brendae, cf. O. occidentalis, Calomys C. musculinus, Phyllotis Reithrodon auritus, Cavia...
Abstract The generic placement and tribal affiliation of Wiedomys marplatensis Quintana, 2002 are revised based on the study its holotype a single known remains from San Andrés Formation (Early Pleistocene; Buenos Aires Province, Argentina). anatomical traits selected as indicators belonging to Hershkovitz, 1959 interpreted here general similarities. is removed considered junior synonym Cholomys pearsoni Reig, 1980. latter Wiedomyini discussed alternative hypothesis allocate 1980 in...
Abstract Nectomys is a cricetid genus of medium-large sized oryzomyines broadly distributed in creeks and rivers lowland South America. It has been mentioned two localities, one Bolivia another Argentina Pleistocene assemblages. After revising the fossils that supported both records we conclude they are not . The record from Reigomys primigenus attributable to Scapteromys In conclusion, past occurrences restricted those undifferentiated Quaternary age Brazilian caves. unexpected connections...
Based on a diverse Late-Holocene (1889–1743 cal yrs BP) small mammal assemblage (14 species, 204 individuals) resulting from the trophic activity of owls, we reconstruct paleoenvironmental conditions Las Chacritas area, Catamarca Province, northwestern Argentina. Twenty modern and one additional samples region were used as comparative parameters in reconstruction. Through direct comparison with present-day Chacritas, using Nonmetric Multidimensional Scaling, spatial temporal beta diversity...
We present a topological analysis of the third upper molars (M3) using recently developed ICAMER nomenclatural system as way to understand dental morphological similarity in sigmodontine rodents, most speciose subfamily cricetids. The method is explored Scapteromys aquaticus and Abrothrix olivacea, taxa belonging two diverse tribes, Akodontini Abrotrichini, respectively, which exhibit high regarding several craniodental traits well external anatomy. Both species show morphologically similar...
We re-evaluate the tribal allocation of Olympicomys vossi, an extinct member Sigmodontinae (Rodentia, Cricetidae). Originally described from fragmentary jaws, this taxon was considered as a Phyllotini. In light new remains, including hemimandibles and for first time anterior part cranium with upper dentition, we propose that it belongs to Reithrodontini. The studied materials were collected in coastal outcrops Vorohué Formation (late Pliocene-early Pleistocene) south Mar del Plata, Buenos...