A5007356865- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Ichthyology and Marine Biology
- Fish biology, ecology, and behavior
- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Amphibian and Reptile Biology
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Geography and Environmental Studies
- Plant Diversity and Evolution
- Geological and Geochemical Analysis
- Fish Biology and Ecology Studies
- Marine animal studies overview
- Pleistocene-Era Hominins and Archaeology
- Fossil Insects in Amber
- Archaeology and Rock Art Studies
- Cephalopods and Marine Biology
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Soil erosion and sediment transport
- Coral and Marine Ecosystems Studies
- Turtle Biology and Conservation
- Methane Hydrates and Related Phenomena
- Paleopathology and ancient diseases
Universidade Federal do Rio Grande do Sul
2015-2024
Universidade Federal do Rio Grande
2006-2023
University of Rio Grande and Rio Grande Community College
2023
Leibniz Institute of Photonic Technology
2023
Instituto de Geociencias
1990-2021
Universidade Federal de Santa Maria
2017-2020
Universidade Estadual do Oeste do Paraná
2020
Development Agency of Serbia
2020
Universidade Federal do Triângulo Mineiro
2018
Serviço Geológico do Brasil - CPRM
2015
The tritheledontid Riograndia guaibensis was the first cynodont described for "Caturrita Formation" fauna from Late Triassic of southern Brazil (Santa Maria 2 Sequence). type materials did not preserve anatomical information regarding braincase, occiput, basicranium, zygomatic arch, postdentary bones and craniomandibular joint. Here new are supply missing information. shows a suite important features quite derived among non-mammaliaform eucynodonts, such as partial closure medial orbital...
Remains of parasites in vertebrates are rare from the Mesozoic and Paleozoic. Once most that live – or pass through gastrointestinal tract vertebrates, fossil feces (coprolites) even intestinal contents (enterolites) can eventually preserve their remains. Here we announce discovery a spiral shark coprolite Paleozoic bearing cluster 93 small oval-elliptical smooth-shelled structures, interpreted as eggs tapeworm.The were found thin section an elasmobranch coprolite. Most filled by pyrite some...
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...
In this contribution we report the first occurrence of enigmatic African probainognathian genus Aleodon in Middle-early Late Triassic several localities from state Rio Grande do Sul southern Brazil. is unusual among early probainognathians having transversely-expanded postcanine teeth, similar to those gomphodont cynognathians. This was previously known Manda Beds Tanzania and upper Omingonde Formation Namibia. The Brazilian record based upon multiple specimens representing different...
A new sauropodomorph dinosaur from the Late Triassic Candelária Sequence (Santa Maria Formation), south Brazil, Bagualosaurus agudoensis gen. et sp. nov., helps to fill a morphological gap between previously known Carnian members of group and younger sauropodomorphs. In some aspects, skull, lower jaw, dental anatomy taxon approaches that seen in Norian forms like Pantydraco caducus, Efraasia minor, Plateosaurus engelhardti. On contrary, post-cranial skeleton is broadly reminiscent coeval,...
An almost complete skeleton of a new carnivorous cynodont from the Upper Triassic Southern Brazil, Trucidocynodon riograndensis gen. nov. et sp. nov., is described. The taxon very similar to Ecteninion lunensis Martinez al. 1996 Argentina (Ischigualasto Formation). Both have an elongated skull, large pterygoid flanges, well developed orbitosphenoid, relatively short osseous secondary palate, greatly canines and sectorial postcanines with posteriorly directed cusps. However, shows some...
The medial Permian (∼270–260 Ma: Guadalupian) was a time of important tetrapod faunal changes, in particular reflecting turnover from pelycosaurian- to therapsid-grade synapsids. Until now, most knowledge on distribution during the has come fossils found South African Karoo and Russian Platform, whereas other areas Pangaea are still poorly known. We present evidence for presence terrestrial carnivorous vertebrate Middle America based complete skull. Pampaphoneus biccai gen. et sp. nov....
Abstract Birds, dinosaurs, crocodilians, pterosaurs and their close relatives form the highly diverse clade Archosauriformes. Archosauriforms have a deep evolutionary history, originating in late Permian, prior to end-Permian mass extinction radiating Triassic dominate Mesozoic ecosystems. However, origins of this its extraordinarily successful body plan remain obscure. Here, we describe an exceptionally preserved fossil skull from Lower Brazil, representing new species, Teyujagua paradoxa ,...
Faxinalipterus minimus was originally described as a purported pterosaur from the Late Triassic (early Norian) Caturrita Formation of southern Brazil. Its holotype comprises fragmentary postcranial elements, whereas partial maxilla referred to species. The assignment Pterosauria has been questioned by some studies, but specimen never accessed in detail after its original description. Here we provide reassessment additional mechanical preparation holotype. Our interpretations on identity...
Abstract In this contribution we describe a new genus and species of gomphodontosuchine cynodont from the Late Triassic Hyperodapedon Assemblage Zone (AZ) Santa Maria Supersequence southern Brazil, based on material collected 20 years ago. The taxon, Santagnathus mariensis gen. et sp. nov., is numerous cranial postcranial remains, which altogether provide data several parts skeleton. closely related to Siriusgnathus niemeyerorum Exaeretodon spp. expands knowledge about cynodonts....
Abstract Body size influences most aspects of an animal's biology, consequently, evolutionary diversification is often accompanied by differentiation body sizes within a lineage. It accepted that miniaturization, or the evolution extremely small sizes, played key role in origin and early different mammalian characters non‐mammaliaform cynodonts. However, while there are multiple studies on biomechanical, behavioral, physiological consequences smaller few explore processes lead to them. Here,...
The small tetrapod Candelaria barbouri, from the Middle Triassic of southern Brazil, is first example an owenettid procolophonoid outside Africa and Madagascar. barbouri was originally described as a primitive procolophonid; however, re-examination holotype, well new material, reveals that C. in fact youngest member Owenettidae, extending chronological range group by more than 10 million years. recognition points to broader diversity distribution for owenettids hitherto thought. In addition,...
ABSTRACT Detailed description of the cranial anatomy rhynchosaur previously known as Scaphonyx sulcognathus allows its assignment to a new genus Teyumbaita . Two nearly complete skulls and partial skull have been referred taxon, all which come from lower part Caturrita Formation, Upper Triassic Rio Grande do Sul, southern Brazil. Cranial autapomorphies include anterior margin nasal concave at midline, prefrontal separated ascending process maxilla, palatal ramus pterygoid expanded laterally...