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Introduction
My main interest is on Permian and Triassic tetrapods from Gondwana. I currently focus on exploring the Parnaíba Basin of NE Brazil. Also interested in science colonialism and illicit fossil traffic issues.
Current institution
Additional affiliations
January 2014 - January 2019
March 2007 - April 2010
July 2003 - September 2006
Education
September 2003 - April 2007
Publications
Publications (105)
A new procolophonid reptile from the Lower Triassic Arcadia Formation of Queensland, Australia is described on the basis of abundant cranial and postcranial remains. Eomurruna yurrgensis gen. & sp. nov. is the first parareptile from Australia, being represented by more than 40 specimens from which a detailed description of the osteology is made. Th...
A new parareptile from the Cisuralian Pedra de Fogo Formation of north-eastern Brazil is described. Karutia fortunata gen. et sp. nov. is the first Gondwanan member of Acleistorhinidae, a clade previously known only from North America but thought to be closely related to the Russian Lanthanosuchidae. A re-examination of parareptile phylogeny indica...
To the Editor — The dinosaur fossil ‘Ubirajara jubatus’ was allegedly exported from Brazil in 1995 and is currently held by State Museum of Natural History Karlsruhe (SMNK) in Germany. It has attracted the attention of the scientific community not only because of its intrinsic interest but also for the controversy surrounding its export from Brazil...
Scientific practices stemming from colonialism, whereby middle- and low-income countries supply data for high-income countries and the contributions of local expertise are devalued, are still prevalent today in the field of palaeontology. In response to these unjust practices, countries such as Mexico and Brazil adopted protective laws and regulati...
New Chondrichthyes fin spines fossils from the Pedra de Fogo Formation (Permian) in State of Tocantins, Brazil. The Parnaíba Basin has a unique fossil record of Chondrichthyes that lived during the Permian period. Within this basin is the Pedra de Fogo Formation, dating from the Cisuralian, which is distributed in parts of the states of Pará, Tocan...
In north-central Brazil, the Cisuralian of the Parnaíba Basin bears very beautiful and well-preserved petrified tree fern stems and leaves. Some are found in inland sea/lacustrine deposits of the Pedra de Fogo Formation, but the majority are in
fluvial system deposits of the lower Motuca Formation. Sedimentation probably occurred in semi-arid condi...
Pareiasaurs were an enigmatic and diverse group of parareptilian herbivores of the middle and late Permian. Nanoparialuckhoffi was erected in 1936 but remains the least well-known member of four “dwarf” pareiasaurs that comprise Pumiliopareiasauria. After new preparation of the holotype, we present the first detailed cranial description of Nanopari...
The parareptiles diversified widely during the Permian and persisted in Pangean ecosystems until the end of the Triassic. However, most parareptiles succumbed to the Permian–Triassic extinction, leading to the exclusive survival of procolophonoids. Procolophonoidea stands out as one of the most diverse parareptile clades, with about 40 species acro...
The Anteosauridae (Dinocephalia) were the largest predators of Guadalupian (Middle Permian) land communities. The, thus far, only known South American anteosaurid is the medium-sized syodontine Pampaphoneus biccai. This taxon was, until now, known only by its holotype, recovered from an outcrop of the Rio do Rasto Formation, Southern Brazil. Here w...
The richly fossiliferous deposits of the Brazilian Pedra de Fogo Formation originated in an extensive aquatic system in tropical Pangaea, and grade from marginal lacustrine into marine deposits at the depocenter in the western part of the Parnaíba Basin. In addition to the well-known tetrapod and macrofloral records from these deposits, the Pedra d...
Dentre os eustelos gimnospérmicos em rochas paleozoicas, existe um grupo denominado "Complexo Solenoide", caracterizado por um sistema especializado em secreção composto por canais/ductos resiníferos ou mucilaginosos na medula, o qual, é especialmente comum na província florística do Gondwana. Este sistema de canais/ductos tem sido considerado e ut...
Resumen gráfico de "Excavando más profundo en las prácticas paleontológicas coloniales en el México y Brasil modernos"
Resumo gráfico de "Aprofundando-se nas práticas colonialistas da paleontologia no México e no Brasil dos dias atuais"
Graphical abstract for "Digging deeper into colonial palaeontological practices in modern day Mexico and Brazil"
Traducción completa al castellano del artículo original.
Tradução completa ao português do artigo original.
Versão integral traduzida do artigo "Digging deeper into colonial palaeontological practices in modern day Mexico and Brazil", publicado na revista Royal Society Open Science em março de 2022. Essa versão em Português faz parte do material suplementar do artigo original.
Solenoid piths are formed by systems of secretory ducts or canals, and they are relatively common in petrified gymnosperms from the Permian of Gondwana. We described herein two new taxa, Polycanaloxylon merlottii gen. et sp. nov. and Europoxylon garapensis sp. nov., from the Pedra de Fogo Formation (Cisuralian), northeastern Brazil. In both species...
Full presentation in English (with PT-BR subtitles) + 1 min. intro in Portuguese. Also available at: https://www.youtube.com/watch?v=vXdzTGAwB24
Most publications on Brazil’s Araripe Basin fossils led by non-Brazilian authors do not report extraction and/or export permits, sometimes even admitting the fossils were commercially acquired (e.g. Irritator challengeri, Susisuchus anatoceps, Ludodactylus sibbicki, Lacusovagus magnificens, Unwindia trigonus, and Tapejara navigans). This represents...
Provelosaurus americanus is the only known representative of the Pareiasauria in the Americas. This mid-size pareiasaur from the Rio do Rasto Formation of southern Brazil has been traditionally considered to be related to smaller forms from the South African Karoo known as the “dwarf pareiasaurs” of Lopingian age. P. americanus, however, co-existed...
Recently collected temnospondyl fossils from the Cisuralian Pedra de Fogo Formation (north-eastern Brazil) indicate a diverse assemblage of aquatic tetrapods, including the dvinosaurs Timonya anneae and Procuhy nazariensis. Here we present revised diagnoses for these species and detailed descriptions of their holotypes. Timonya anneae is distinguis...
This paper characterizes the ichnology and sedimentology of the Lower Paleozoic Parnaíba Basin beds exposed in the Poti River Canyon (Piauí State, NE Brazil) and discusses the paleoenvironmental significance of the ichnofauna. The sedimentary succession represents the Silurian–Devonian infill of the Parnaíba Basin and comprises mouth bar deposits (...
The Permian petrified forests of the Parnaíba Basin represent an important part of the Brazilian Palaeobotany heritage. The stems show excellent preservation and have a high scientific, educative, and touristic potential. These forests, especially in the central part of the basin (Poti River Petrified Forest, Petrified Forest of the Garapenses Hill...
https://www.youtube.com/watch?v=hFdL-Op_1jU
Continuing the study of petrified gymnosperm trunks recovered from the Pedra de Fogo Formation, we identify here two new taxa from the Permian deposits of the Parnaíba Basin, northeastern Brazil. One taxon is an endemic form named Ductolobatopitys mussae Conceição, Neregato et Iannuzzi, nov. gen., nov. sp., characterized by solenoid, lobed and non-...
The Pedra de Fogo Formation in the Parnaíba Basin of northeastern Brazil hosts a recently discovered lacustrine fauna and provides the only known record of the Captorhinidae in South America. Here, new captorhinid remains from this unit are described. Two partial mandibles, including one formerly ascribed to the genus Captorhinus, are here referred...
Anatomically preserved gymnosperm stems are relatively abundant in the Permian outcrops of the Parnaíba Basin, but their anatomy has rarely been studied in detail. Here we describe two new fossil gymnosperm trunks from the Lower Permian (Cisuralian) strata of the Pedra de Fogo Formation in the municipality of Nova Iorque, southern Maranhão State, n...
Two new tetrapod trackways are described from the Tapinocephalus Assemblage Zone of the South African Karoo Basin. We interpret both to be traces attributable to small anamniote tetrapods. The larger footprints are tentatively referred to aff. Batrachichnus salamandroides. These imprints are distinguished from other records of Batrachichnus by a pe...
Apresentação de fósseis localizados na área urbana de Teresina. Educação e patrimônio paleontológico.
A Formação Rio do Rasto da Bacia do Paraná, no sul do Brasil, representa o final de um ciclo transgressivo-regressivo que resultou na continentalização da bacia, sendo depositado em sistemas fluvio-lacustres. É a única unidade estratigráfica do América do Sul a preservar faunas terrestres que indicam certa similaridade com faunas permianas da Bacia...
The Upper Carboniferous Sandstone at São Gonçalo do Gurgueia, Northeastern of the Brazil, is notable for its large number of preserved root-like structures. Among these structures it is found rhizoliths, fossils of a root system, containing the original cellular material and mineral impregnation and/or mineral replacement. Furthermore, the fossil c...
Este artigo tem como objetivo fornecer análises preliminares e sugerir a elaboração de um modelo preditivo para a arqueologia no extremo sul do estado do Piauí, levando em consideração as características geoambientais da região e um sítio paleontológico e arqueológico no município de Corrente, Piauí. A área de estudo apresenta arenito silicificado...
Although Permian fossils have been known from the Parnaíba Basin for two centuries, and some faunal and flora elements are well known worldwide, research on the fossil assemblages from this basin has
lagged relative to other, more accessible basins. In the last decade, however, there has been a significant increase in the study of fossils from the...
The Pedra de Fogo Formation dated from the early Permian (approximately 280 Mya), belongs to the sedimentary Parnaíba Basin, located in the northeastern region of Brazil. It is recognized by their well preserved plant fossil contents and it is notable for having several fossilized trunks in the life position. This study presents physical and/or che...
In this paper we performed the study of two coprolites (fossilized feces) collected from the exposed levels of the Pedra de Fogo Formation, Parnaiba Sedimentary Basin, and Rio do Rasto Formation, Paraná Sedimentary Basin, both of the Palaeozoic era (Permian age). They were characterized using X-ray diffractometry, infrared, Raman and energy dispers...
Preparación de un pequeño anfibio divinosaurio articulado proveniente del nivel inferior de la Formación Pedra do Fogo, Estado do Piauí, Brasil. El análisis del espécimen UFPI PV193 se basó en la irradiación del ejemplar por iluminación ultravioleta
de onda larga 400-315nm. El enfoque de bajo costo y no destructivo utiliza un foco de calidad comerc...
Abstract - New record of a Petrified Forest in Altos, Piauí: importance and strategies for geoconservation. Here were present a new record of fossil plants from the early Permian Pedra de Fogo Formation of the Parnaíba Basin, northeastern Brazil. This fossiliferous area, here named São Benedito Paleobotanical Site in municipality of Altos, Piauí st...
The “Pedra de Fogo” Formation dated from the Permian period (approximately 280 million years ago), belongs to the sedimentary Parnaiba Basin, located in the northeastern region of Brazil. It is recognized by their well preserved fossil contents and it is notable for having several fossilized trunks in the growing position. Specimens from different...
The “Pedra de Fogo” Formation dated from the Permian period (approximately 280 million years ago), belongs to the sedimentary Parnaiba Basin, located in the northeastern region of Brazil. It is recognized by their well preserved fossil contents and it is notable for having several fossilized trunks in the growing position. Specimens from different...
CT-rendering of specimen UFPI PV001, holotype of Timonya anneae, cranium and partial postcranium. Rotation around the long axis of the skeleton.
Supplementary Figure 1, Supplementary Table 1, Supplementary Note 1-2, Supplementary Discussion and Supplementary References
Terrestrial vertebrates are first known to colonize high-latitude regions during the middle Permian (Guadalupian) about 270 million years ago, following the Pennsylvanian Gondwanan continental glaciation. However, despite over 150 years of study in these areas, the bio-geographic origins of these rich communities of land-dwelling vertebrates remain...
Anomodontia was a highly successful tetrapod clade during the Permian and the Triassic. New morphological information regarding two bizarre basal anomodonts is provided and their palaeoecological significance is explored. The osteology of the recently discovered Tiarajudens eccentricus Cisneros et al. 2011, from the Brazilian Permian, is described...
The Parnaiba Sedimentary Basin is of the Paleozoic age and is located in Northeast Brazil, covering the states of Piauí, Maranhão and Tocantins and a small part of Ceará and Pará. In this work we applied several chemical analytical techniques to characterize trunk fossils found in the Parnaíba Sedimentary Basin, collected from four different sites,...
The medial Permian (~270-260 Ma: Guadalupian) was a time of important tetrapod faunal changes, in particular reflecting a turnover from pelycosaurian- to therapsid-grade synapsids. Until now, most knowledge on tetrapod distribution during the medial Permian has come from fossils found in the South African Karoo and the Russian Platform, whereas oth...
The Parareptilia are a small but ecologically and morphologically diverse clade of Permian and Triassic crown amniotes generally considered to be phylogenetically more proximal to eureptiles (diapsids and their kin) than to synapsids (mammals and their kin). A recent supertree provides impetus for an analysis of parareptile diversity through time a...
Anomodonts, a group of herbivorous therapsid "mammal-like reptiles," were the most abundant tetrapods of the Permian. We present a basal anomodont from South America, a new taxon that has transversally expanded palatal teeth and long saber canines. The function of the saber teeth is unknown, but probable uses include deterring attack from predators...
A recent phylogenetic analysis of procolophonid parareptiles is used as the basis for a study of morphological diversity (disparity) in these amniotes. Disparity values are compared in three groups of procolophonids (a paraphyletic series of basal taxa and two monophyletic sister groups: procolophonines and leptopleuronines), two ecophenotypic asse...
Rotation of vertebrae BP-1-5796, made from 180 neutron images in 180 angular degrees.
(3.13 MB MPG)
Parasagittal slices of vertebrae BP-1-5796, from left to right.
(1.04 MB MP4)
Transversal slices of vertebrae BP-1-5796, in posterior to anterior direction.
(2.21 MB MP4)
Coronal slices of vertebrae BP-1-5796, in ventral to dorsal direction.
(1.17 MB MP4)
The evidence of several forms of arthritis has been well documented in the fossil record. However, for pre-Cenozoic vertebrates, especially regarding reptiles, this record is rather scarce. In this work we present a case report of spondarthritis found in a vertebral series that belonged to a carnivorous archosaurian reptile from the Lower Triassic...
The Middle Permian Tapinocephalus Assemblage Zone in South Africa has produced a rich record of tetrapods dominated by dinocephalian therapsids and pareiasaurid parareptiles. In this study we reassess the affinities of a specimen from this horizon previously identified as a procolophonoid and provide evidence that it is instead referable to a nycte...
A histological analysis of the dentition of the small procolo− phonid parareptile Soturnia caliodon reveals detailed infor− mation concerning tooth implantation and replacement for this taxon. The presence of acrodont tooth implantation is ver− ified, which contradicts current models for procolophonid dentition. A heterogeneous enamel layer, that r...
A second specimen of the poorly known millerettid Broomia perplexa is reported. It consists of a cranium and partially articulated postcranium. As indicated by its small size (ca. 35% shorter skull than the holotype) and unfused pelvis and limbs, the new specimen is a sub-adult individual. Comparison with the holotype reveals only minor differences...
SYNOPSIS The phylogenetic intrarelationships of procolophonid parareptiles are determined via a comprehensive cladistic analysis using a data matrix of 21 taxa and 58 characters. Most taxa are in-cluded for the first time in a phylogenetic analysis and 27 characters are novel. The relationships within the group are more firmly resolved than in prev...
A new procolophonid reptile, Kitchingnathus untabeni n. gen. et n. sp., is described from the uppermost strata of the Lystrosaurus Assemblage Zone of the Karoo Basin, South Africa. The new taxon co-occurs with the well-known Procolophon trigoniceps. The most distinctive feature of the new taxon is the presence of numerous small bicuspid molariforms...
Os rotíferos são pequenos filtradores importantes para as cadeias tróficas dos ambientes aquáticos, bem como na ciclagem dos nutrientes. No Estado do Mato Grosso Sul pouco se conhece sobre a fauna desses invertebrados. Dessa forma, procurou-se, neste estudo, investigar a ocorrência e distribuição do grupo nessa região. As coletas foram realizadas e...
The specific composition of the genus Procolophon in Brazil, South Africa and Antarctica is discussed in the light of new data. It is found that P. pricei and P. brasiliensis, two species described from Brazil, fit within the pattern of ontogenetic variation of the type species P. trigoniceps, and they are here considered junior synonyms. The South...
In the past, meaningful information about the internal features of plant and animal fossils has only been accessible through the application of irreversible destructive procedures to rare and in many cases irreplaceable fossils. Now, neutron tomography (NT) complemented with X-ray computer assisted tomography (CT or CAT-Scan), both Non-Destructive...
The first report of a multitaxon aggregation from the Early Triassic Lystrosaurus Assemblage Zone is presented here. The aggregation includes two vertebrates - the suricate-sized cynodont Galesaurus planiceps and a gecko-like procolophonoid Owenetta kitchingorum - and a diplopod millipede. The high degree of articulation of the skeletal remains and...
The discovery of an Early-Middle Pleistocene continental vertebrate fauna from El Salvador is here reported. These fossils provide information about a poorly studied geographic area that played an important role during the Great American Faunal Interchange. The fauna is dominated by numerous remains of the proboscidean Cuvieronius tropicus and prob...
