A5018728939- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Ichthyology and Marine Biology
- Amphibian and Reptile Biology
- Paleontology and Stratigraphy of Fossils
- Morphological variations and asymmetry
- Geological and Geophysical Studies
- Pleistocene-Era Hominins and Archaeology
- Geology and Paleoclimatology Research
- Fish biology, ecology, and behavior
- Marine and coastal plant biology
- Marine Ecology and Invasive Species
- Marine Biology and Ecology Research
- Scarabaeidae Beetle Taxonomy and Biogeography
- Fossil Insects in Amber
- Species Distribution and Climate Change
- Aquatic Invertebrate Ecology and Behavior
- Animal Behavior and Reproduction
- Genomics and Phylogenetic Studies
- Geological and Tectonic Studies in Latin America
- Space Exploration and Technology
- Plant Diversity and Evolution
- Pharmaceutical Practices and Patient Outcomes
- Coronary Artery Anomalies
- Venomous Animal Envenomation and Studies
Bernardino Rivadavia Natural Sciences Museum
2016-2025
Consejo Nacional de Investigaciones Científicas y Técnicas
2016-2025
University of Birmingham
2016-2025
Centro Científico Tecnológico - Tucumán
2017-2023
University of Zurich
2021
Argerich Hospital
2021
Centro Científico Tecnológico - San Juan
2019
Ludwig-Maximilians-Universität München
2012-2016
University of Fribourg
2016
Carnegie Museum of Natural History
2016
The early evolution of archosauromorphs during the Permo-Triassic constitutes an excellent empirical case study to shed light on evolutionary radiations in deep time and timing processes recovery terrestrial faunas after a mass extinction. However, macroevolutionary studies are currently limited by poor knowledge their phylogenetic relationships. In particular, one main archosauromorph groups that need exhaustive is “Proterosuchia,” which as historically conceived includes members both...
Abstract Although simulations have shown that implied weighting (IW) outperforms equal (EW) in phylogenetic parsimony analyses, against homoplasy lacks extensive usage palaeontology. Iterative modifications of several matrices the last decades resulted genealogies datasets allow evaluation differences stability results for alternative character methods directly on empirical data. Each generation was compared most recent each genealogy because it is assumed comprehensive (higher sampling),...
Late Mesozoic palaeobiogeography has been characterized by a distinction between the northern territories of Laurasia and southern landmasses Gondwana. The repeated discovery Gondwanan lineages in led to proposal alternative scenarios explain these anomalous occurrences. A new biogeographical model for late terrestrial ecosystems is here proposed which Europe "Gondwanan" possessed common Eurogondwanan fauna during earliest Cretaceous. Subsequently, following Hauterivian, European severed...
Sauria is the crown-group of Diapsida and subdivided into Lepidosauromorpha Archosauromorpha, comprising a high percentage diversity living fossil tetrapods. The split between lepidosauromorphs archosauromorphs (the crocodile-lizard, or bird-lizard, divergence) considered one key calibration points for molecular analyses tetrapod phylogeny. Saurians have very rich Mesozoic Cenozoic record, but their late Paleozoic (Permian) record problematic. Several Permian specimens been referred to...
It was traditionally thought that the oldest known dinosaur assemblages were not diverse, and their early diversification numerical dominance over other tetrapods occurred during latest Triassic. However, new evidence gathered from lower levels of Ischigualasto Fm. Argentina challenges this view. New remains are described stratigraphical unit, including species Chromogisaurus novasi. This taxon is distinguished basal dinosauriforms by presence proximal caudals without median notch separating...
One of the key faunal transitions in Earth history occurred after Permo-Triassic mass extinction ( ca 252.2 Ma), when previously obscure archosauromorphs (which include crocodylians, dinosaurs and birds) become dominant terrestrial vertebrates. Here, we place all known middle Permian–early Late Triassic archosauromorph species into an explicit phylogenetic context, quantify biodiversity change through this interval. Our results indicate following sequence diversification: a morphologically...
Abstract Mass extinctions have profoundly impacted the evolution of life through not only reducing taxonomic diversity but also reshaping ecosystems and biogeographic patterns. In particular, they are considered to driven increased cosmopolitanism, quantitative tests this hypothesis rare explicitly incorporated information on evolutionary relationships. Here we quantify faunal cosmopolitanism using a phylogenetic network approach for 891 terrestrial vertebrate species spanning late Permian...
Abstract Present knowledge of Late Triassic tetrapod evolution, including the rise dinosaurs, relies heavily on fossil-rich continental deposits South America, their precise depositional histories and correlations. We report an extended succession Ischigualasto Formation exposed in Hoyada del Cerro Las Lajas (La Rioja, Argentina), where more than 100 fossils were newly collected, augmented by historical finds such as ornithosuchid Venaticosuchus rusconii putative ornithischian Pisanosaurus...
Dinosaurs and pterosaurs have remarkable diversity disparity through most of the Mesozoic Era1–3. Soon after their origins, these reptiles diversified into a number long-lived lineages, evolved unprecedented ecologies (for example, flying, large herbivorous forms) spread across Pangaea4,5. Recent discoveries dinosaur pterosaur precursors6–10 demonstrated that animals were also speciose widespread, but those precursors few if any well-preserved skulls, hands associated skeletons11,12. Here we...
Abstract The Chañares Formation (Ischigualasto‐Villa Unión Basin) is worldwide known by its exquisitely preserved fossil record of latest Middle‐to‐early Late Triassic tetrapods, including erpetosuchids, “rauisuchians,” proterochampsids, gracilisuchids, dinosauromorphs, pterosauromorphs, kannemeyeriiform dicynodonts, and traversodontid, chiniquodontid probainognathid cynodonts, coming from the Tarjadia (bottom) Massetognathus ‐ Chanaresuchus (top) Assemblage Zones lower member. Regarding...
It has often been assumed that Australasian Cretaceous dinosaur faunas were for the most part endemic, but with some Laurasian affinities. In this regard, dinosaurs have considered Jurassic relicts, while others thought to represent typical forms or endemic taxa. Furthermore, it proposed dinosaurian lineages, namely oviraptorosaurians, dromaeosaurids, ornithomimosaurians and protoceratopsians, may originated in Australia before dispersing Asia during Early Cretaceous. Here we provide a...
Defecation in communal latrines is a common behaviour of extant mammals widely distributed among megaherbivores. This has key social functions with important biological and ecological implications. Herbivore are only documented their fossil record exceptionally restricted to the late Cenozoic. Here we report discovery several massive coprolite associations Middle-Late Triassic Chañares Formation, Argentina, which represent based on high areal density, small extension taphonomic attributes....
Until now the Doswelliidae was considered a monospecific family including Doswellia kaltenbachi from Late Triassic of North America. The phylogenetic position this taxon remained enigmatic until recently, when sister-group relationship with Proterochampsidae suggested. In present contribution we describe new doswelliid species Archeopelta arborensis gen. et sp. nov. Middle–Late Brazil. A cladistic analysis recovered Archeopelta, Doswellia, and Tarjadia within monophyletic group basal...
Triassic tetrapods are of key importance in understanding their evolutionary history, because several tetrapod clades, including most modern lineages, first appeared or experienced initial radiation during this Period. In order to test previous palaeobiogeographical hypotheses faunas, tree reconciliation analyses (TRA) were performed with the aim recovering biogeographical patterns based on phylogenetic signals provided by a composite Middle and Late tetrapods. The TRA found significant...
The origin and early radiation of archosaurs closely related taxa (Archosauriformes) during the Triassic was a critical event in evolutionary history tetrapods. This led to dinosaur-dominated ecosystems Jurassic Cretaceous, high present-day archosaur diversity that includes around 10,000 bird crocodylian species. timing dynamics this are currently obscured by poorly constrained phylogenetic positions several key archosauriform taxa, including species from Middle Argentina (Gracilisuchus...
The first fossil remains of vertebrates, invertebrates, plants and palynomorphs the Chorrillo Formation (Austral Basin), about 30km to SW town El Calafate (Province Santa Cruz), are described. Fossils include elasmarian (basal Iguanodontia) Isasicursor santacrucensis gen. et sp. nov., large titanosaur Nullotitan glaciaris both small Megaraptoridae indet., fragments sauropod theropod eggshells. list vertebrates is also composed by Neognathae Kookne yeutensis two isolated caudal vertebrae...