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February 1999 - present
Publications
Publications (53)
Levantamento das ocorrências dos dinossauros ornitísquios gondwânicos e as condições ambientais que implicaram na distribuição do grupo no supercontinente.
A remarkably well-preserved, almost complete and articulated new specimen (GP/2E 9266) of Tupandactylus navigans is here described for the Early Cretaceous Crato Formation of Brazil. The new specimen comprises an almost complete skeleton, preserving both the skull and post-cranium, associated with remarkable preservation of soft tissues, which make...
Melanosomes (melanin-bearing organelles) are common in the fossil record occurring as dense packs of globular microbodies. the organic component comprising the melanosome, melanin, is often preserved in fossils, allowing identification of the chemical nature of the constituent pigment. In present-day vertebrates, melanosome morphology correlates wi...
Permian bivalves of the Paraná Basin evolved in a large inland sea, under conditions of extreme isolation and environmental stress. Although known since 1918, its evolutionary history is still obscure due to the incomplete and biased information on faunal composition and stratigraphic distribution of various assemblages. Hence, the description of t...
This paper presents the first possible occurrence of Lingularia in the Carboniferous of the Parnaíba Basin, Brazil. In addition, an attempt to clarify the classification of lingulids of Brazil and to demonstrate that the diversity of the group can still be better known and explored in the Brazilian basins is made.
Feathers are rare in the fossil record because they have a low fossilization potential. Despite their palaeobiological significance, they also provide important palaeoecological and taphonomic information. Here, we report a new occurrence of three isolated feathers from the shales of the Oligocene Tremembé Formation (Taubaté Basin, SE Brazil). Thei...
Here we describe three fossil feathers from the Early Cretaceous Santana Formation of the Araripe Basin, Brazil. Feathers are the most complex multiform vertebrate integuments; they perform different functions, occurring in both avian and non-avian dinosaurs. Despite their rarity, fossil feathers have been found across the world. Most of the Brazil...
Feathers are the most complex and diversified integuments in vertebrates. Their complexity are provided by the different forms and functions, and they occur both in non-avian and avian-dinosaurs. Despite their rareness, feathers are found throughout the world, and the Santana Formation (comprised by Crato and Romualdo formations) of the Araripe Bas...
Feathers are the most complex and diversified integuments in vertebrates. Their complexity are provided by the different forms and functions, and they occur both in non-avian and avian-dinosaurs. Despite their rareness, feathers are found throughout the world, and the Santana Formation (comprised by Crato and Romualdo formations) of the Araripe Bas...
The delimitation and mapping of the Serra Alta Formation in the São Paulo State, Brazil, has always been a focus of controversy in the Brazilian geological community. Despite its large extension in subsurface, which may be comparable to the Irati For‑ mation, the Serra Alta Formation still needs more detailed studies on its stratigraphic position,...
RESUMO: A individualização e o mapeamento da Formação Serra Alta no Estado de São Paulo sempre foi motivo de controvérsia na comunidade geológica. Apesar de apresentar extensão comparável à Formação Irati em subsuperfície, a unidade ainda carece de estudos mais acurados acerca de seu posicionamento estratigráfico, conteúdo fossilífero, sistema depo...
Shell bed levels in the Low Head Member of the early Oligocene Polonez Cove Formation at King George Island, West Antarctica, are re-interpreted based on sedimentological and taphonomic data.The highly fossiliferous Polonez Cove Formation is characterized by basal coastal marine sandstones,overlain by conglomerates and breccias deposited in fan-del...
The uppermost portion of the Taciba Formation, Itararé Group, Paraná Basin, Brazil, records a succession of depositional environments tied to the demise of late Paleozoic glaciation. In the study area, Teixeira Soares county, state of Paraná, the unit is dominated by massive to laminated diamictites with inclusions of sandstones and other coarse-gr...
During the Ediacaran the Clymene Ocean separated the Laurentia, Amazonia, and Río Apa cratons from several landmasses to the west forming the proto-Gondwana supercontinent. However, no clear evidence about the existence of Ediacaran epeiric seas over those landmasses has been found. Here we report and discuss the discovery of the Ediacaran guide fo...
A revision of the late Palaeozoic South American pectinid Heteropecten multiscalptus (Thomas) and the establishment of Heteropecten paranaensis sp. nov. have important implications for the relationship between faunal realms within South America. Late Palaeozoic bivalve faunas occur in three distinct realms in South America: a Central Gondwanic Real...
The emergence of soft-bodied metazoans and the radiation of the earliest skeletal organisms substantially changed the ecological dynamics of Ediacaran environments, leading to the genesis of biogenic hard-part deposits for the first time in Earth's history. The impact of bioclast origin on sedimentary processes is analyzed herein, focusing on the s...
Com o intuito de produzir material didático, foi criada há 17 anos no Instituto de Geociências da Universidade de São Paulo, a Oficina de Réplicas. Com a finalidade de suprir a necessidade de material didático paleontológico para o ensino, a oficina desenvolve réplicas em resina a partir de fósseis originais e de modelagens elaboradas por paleoarti...
A presença de penas nos registro fóssil corresponde a casos excepcionais de preservação por se tratarem de estruturas frágeis e de difícil fossilização. São conhecidos no mundo cerca de 50 depósitos fossilíferos contendo penas fósseis, sendo a Formação Santana (Cretáceo) e a Formação Tremembé (Oligoceno) os sítios brasileiros. Procura-se neste trab...
Simões, M.G., Quaglio, F., Warren, L., Anelli, L.E., Stone, P., Riccomini, C., Grohmann, C.H. & Chamani, M.A.C. iFirst article. Permian non-marine bivalves of the Falkland Islands and their palaeoenvironmental significance. Alcheringa, 1–13. ISSN 0311-5518.We describe the occurrence of non-marine bivalves in exposures of the Middle Permian (Capitan...
Oriocrassatella Etheridge Jr., 1907 is a long range crassatellid bivalve genus well recognized in shallow waters of epeiric seas throughout the upper part of Paleozoic. The first occurrences of this genus are recorded in the sedimentary successions of the Gondwana, both in Australia and South America. However, the geographic and age distribution of...
A small and poorly diversified bivalve fauna from Taciba Formation, Itararé Group, Paraná Basin (State of Santa Catarina, Mafra Municipality), is described in this paper for the first time, based on new findings. The fauna is recorded in a 30 cm thick interval of fine sandstone locally at the top of Taciba Formation, in the Butiá quarry. The studie...
Terra Nova, 23, 382–389, 2011
An in situ assemblage of Cloudina, thrombolites and an ichnofossil (cf. Archaeonassa), together with fragments of Corumbella werneri, is reported here, from a tidally influenced, shallow, lagoonal setting on a carbonate ramp within the Itapucumi Group, Paraguay. The association of Cloudina with thrombolites is comparab...
Fossil bivalves from two horizons in the Gai-As Formation of NW Namibia are tentatively correlated with mid-Permian taxa of the Passa Dois Group of Brazil, supporting the concept that the Paraná Basin extended into Africa. The Namibian fauna includes a new genus and species, Huabiella compressa, which was previously confused with Brazilian taxa. Th...
The unusual bivalve Guiratingia mendesi is redescribed from the original material. Detailed analysis of hinge and muscle scars allows more refined designation of its taxonomic position and affinities to other Permian bivalves from the Paraná Basin. Guiratingia mendesi is characterized by very small, anteriorly expanded shells, with a great number o...
During a recent inspection in the Paleontological Collection of the Institute of Geosciences, University of São Paulo, we have identifi ed some specimens of undescribed mollusk bivalves. These called our attention for the following reasons: a) all specimens are internal molds of conjugated and closed articulated valves, some of them presenting frag...
In this study, the occurrence of Othonella araguaiana Mendes, a rare bivalve species is reported for the fi rst time in the Pinzonella illusa biozone, Middle Permian Corumbataí Formation, in the State of São Paulo. This species was originally described in coeval rocks of the Estrada Nova Formation (= Corumbataí) from the Alto Araguaia and Alto Garç...
During a recent inspection in the Paleontological Collection of the Institute of Geosciences, University of São Paulo, we have identifi ed some specimens of undescribed mollusk bivalves. These called our attention for the following reasons: a) all specimens are internal molds of conjugated and closed articulated valves, some of them presenting frag...
In this study, the occurrence of Othonella araguaiana Mendes, a rare bivalve species is reported for the fi rst time in the Pinzonella illusa biozone, Middle Permian Corumbataí Formation, in the State of São Paulo. This species was originally described in coeval rocks of the Estrada Nova Formation (= Corumbataí) from the Alto Araguaia and Alto Garç...
Dolostones of the upper Piauí Formation, Parnaíba Basin, Northern Brazil, record a rich and diversified invertebrate fauna of the Middle Pennsylvanian (Morrowan to Desmoinesian) age. Among bivalves, Heteroconchia is the most diversified (seventeen species) followed by Pteriomorphia (eleven species) and Palaeotaxodonta (three species). Heteroconch b...
Eight taxa of marine invertebrates, including two new bivalve species, are described from the Low Head Member of the Polonez Cove Formation (latest early Oligocene) cropping out in the Vauréal Peak area, King George Island, West Antarctica. The fossil assemblage includes representatives of Brachiopoda (genera Neothyris sp. and Liothyrella sp.), Biv...
Environmental changes occurred in Southern Hemisphere in response to the separation of Antarctica from Australia, around Eocene/Oligocene boundary, and from South America, during the late Oligocene, greatly affected biodiversity in Southern Ocean. Although it is generally accepted that the Antarctic thermal isolation affected the Cenozoic biodivers...
Dolostones of the upper Piaui Formation, Parnaiba Basin, northern Brazil, preserve a rich and diversified invertebrate fauna of Morrowan to Desmoinesian age. Among bivalves, Heteroconchia (15 species) is the most diversified, followed by Pteriomorphia (11 species), and rare endobenthic species of the Palaeotaxodonta. (three species). Eleven species...
Seven species of marine bivalves, including six new taxa, are described from the Cape early Miocene Melville Formation which crops out on the Melville Peninsula, King George Island, West Antarctica. The bivalve assemblage includes representatives of the families Nuculidae, Ennucula frigida sp. nov., E. musculosa sp. nov.; Malletidae, Neilo (Neilo)...
Na região do Vale do Ribeira, sul do Estado de São Paulo, desenvolve-se um sistema
complexo de grutas em rochas carbonáticas pré-cambrianas. Uma assembléia fóssil de
macrovertebrados (peso adulto >5 kg) do Holoceno, proveniente da gruta vertical, Abismo
Ponta de Flecha, Município de Iporanga, foi examinada do ponto de vista tafonômico para
caracter...
Dolomitic limestones of the upper Piauí Formation of the Parnaíba Basin, Northern Brazil, preserve a rich and diversified invertebrate fauna of Middle Pennsylvanian age. The fauna shows affinities with the Pennsylvanian Itaituba Formation of the Amazon Basin, Brazil, and with Upper Paleozoic Andean faunas of the Cerro Prieto Formation and Tarma Gro...
Caracterização tafonômica da fauna de macrovertebrados holocênicos do Abismo Ponta de Flecha, Iporanga, SP. In: PALEO 2002, 2002, São Paulo. Paleontologia em Destaque, 2002. v. 40. p. 40.
A new genus, Runnegariella (type-species, R. fragilis, s. n.), is proposed for small silicified pelecypod shells from Corumbatai Formation (Upper Permian), Parana Basin, Brazil. According to functional morphology R. fragilis may be considered a rapid shallow burrower.
Tese (Doutorado)--Instituto de Geociências da Universidade de São Paulo, 18.05.99.
