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Featured researches published by Átila Augusto Stock da Rosa.


Proceedings of the Royal Society of London B: Biological Sciences | 2004

A procolophonoid reptile with temporal fenestration from the Middle Triassic of Brazil

Juan Carlos Cisneros; Ross Damiani; Cesar L. Schultz; Átila Augusto Stock da Rosa; Cibele Schwanke; Leopoldo Witeck Neto; Pedro Lucas Porcela Aurélio

The small tetrapod Candelaria barbouri, from the Middle Triassic of southern Brazil, is the first example of an owenettid procolophonoid outside Africa and Madagascar. Candelaria barbouri was originally described as a primitive procolophonid; however, a re–examination of the holotype, as well as new material, reveals that C. barbouri is in fact the youngest member of the Owenettidae, extending the chronological range of the group by more than 10 million years. The recognition of C. barbouri as an owenettid points to a broader diversity and distribution for owenettids than hitherto thought. In addition, C. barbouri is the first member of the Owenettidae to exhibit temporal fenestrae, a discovery that draws attention to the significance of this feature in ‘anapsid’ reptiles.


Historical Biology | 2013

Dinosaur remains from the 'Botucaraí Hill' (Caturrita Formation), Late Triassic of south Brazil, and their stratigraphic context

Jonathas S. Bittencourt; Átila Augusto Stock da Rosa; Cesar L. Schultz; Max C. Langer

Vertebrate fossils recovered from sites nearby the Botucaraí Hill and Candelária (Caturrita Formation) depict a diverse Late Triassic tetrapod fauna from south Brazil. These records are of key importance to the biostratigraphy of the upper sections of the Rosario do Sul Group. A lithological and biostratigraphic survey on the main fossil localities of the Botucaraí Hill area confirms the occurrence of the lower Hyperodapedon and the upper Riograndia Assemblage Zones in the region, the latter yielding early saurischians. In this paper, three incomplete dinosaur specimens, an isolated sacral vertebra, an articulated left pubis–ischium and an isolated right ischium, from the ‘Botucaraí Hill’ site are described. A comparative survey suggests that these specimens have sauropodomorph affinities, but probably more primitive than typical ‘prosauropods’ from the Norian-Early Jurassic. Regardless of the phylogenetic position of Guaibasaurus as theropod or sauropodomorph, their occurrence in the Caturrita Formation, which also yielded ‘core prosauropods’ from the Santa Maria region, suggests either the survival of early members of the clade with more derived ‘prosauropods’ or that heterochronous faunas are sampled from that stratigraphic unit.


PeerJ | 2017

Supradapedon revisited: geological explorations in the Triassic of southern Tanzania

Max C. Langer; Átila Augusto Stock da Rosa; Felipe C. Montefeltro

The upper Triassic deposits of the Selous Basin in south Tanzania have not been prospected for fossil tetrapods since the middle of last century, when Gordon M. Stockley collected two rhynchosaur bone fragments from the so called “Tunduru beds”. Here we present the results of a field trip conducted in July 2015 to the vicinities of Tunduru and Msamara, Ruvuma Region, Tanzania, in search for similar remains. Even if unsuccessful in terms of fossil discoveries, the geological mapping conducted during the trip improved our knowledge of the deposition systems of the southern margin of the Selous Basin during the Triassic, allowing tentative correlations to its central part and to neighbouring basins. Moreover, we reviewed the fossil material previously collected by Gordon M. Stockley, confirming that the remains correspond to a valid species, Supradapedon stockleyi, which was incorporated into a comprehensive phylogeny of rhynchosaurs and found to represent an Hyperodapedontinae with a set of mostly plesiomorphic traits for the group. Data gathered form the revision and phylogenetic placement of Su. stockleyi helps understanding the acquisition of the typical dental traits of Late Triassic rhynchosaurs, corroborating the potential of hyperodapedontines as index fossils of the Carnian-earliest Norian.


Geologia USP. Série Científica | 2016

Incêndios vegetacionais Indo-Brasileiros no Neopaleozoico: uma revisão dos registros de carvão vegetal macroscópico

André Jasper; Dieter Uhl; Rajni Tewari; Margot Guerra-Sommer; Rafael Spiekermann; Joseline Manfroi; Isa Carla Osterkamp; José Rafael Wanderley Benício; Mary Elizabeth Cerruti Bernardes-de-Oliveira; Etiene Fabbrin Pires; Átila Augusto Stock da Rosa

Sedimentary charcoal is widely accepted as a direct indicator for the occurrence of paleo-wildfires and, in Upper Paleozoic sediments of Euramerica and Cathaysia, reports on such remains are relatively common and (regionally and stratigraphically) more or less homogeneously distributed. On the contrary, just a few reliable records have been published for the Late Paleozoic of Gondwana and only recently it has been demonstrated that macroscopic charcoals (and thus fires) were also common in the southern continent during this period. The most important Gondwanan records are predominantly charred gymnosperm woods mainly related to coal bearing strata. Late Paleozoic macro-charcoal occurs in both, the Damodar Basin (India) and the Paraná Basin (Brazil), demonstrating that paleo-wildfires were spread out in different sequences and distinct stratigraphic intervals during this period in Gondwana. Based on the so far published records as well as new samples from the Seam-VI coalfield, Raniganj Formation (Damodar Basin – Lopingian of India), an overview of the Late Paleozoic Indo-Brazilian macro-charcoal remains is presented. The hitherto unpublished samples were anatomically analyzed under Scanning Electron Microscope and a gymnosperm affinity could be established. The data presented here reinforce the relevance of paleo-wildfire as a source of environmental disturbance over large areas of Gondwana during the Late Paleozoic.


Revista do Instituto Geológico | 2012

Registro palinológico de depósitos sedimentares neopleistocênicos do Rio Madeira, Rondônia, Amazônia brasileira

Maria Ecilene Nunes da Silva Meneses; Etiene Fabbrin Pires; Átila Augusto Stock da Rosa; Luciano A. Leal; Laís Aguiar da Silveira Mendes; Milton José de Paula; Francisco Edinardo Ferreira de Souza; José Rafael Wanderley Benício; Leomir dos Santos Campos

The present paper presents a study of identification of palynological assemblages from a layer of sediment taken from a modern forested area situated in the upper course of the Madeira River, within the region of influence of the AHE Jirau, Rondonia, Brazilian Amazon. Radiometric carbon dating using 14C (AMS method) furnished ages between 41,350 and 43,500 years Before Present (B.P.), or Late Pleistocene, for the studied layer. The results reveal a set of palynomorphs marked by low diversity of pollen families with predominantly tropical forest types showing an upward increase in pollen grains typical of wet environments, probably suggesting the installation of a swamp. No other vegetational change was observed during the period recorded in this study, and in general the data are in agreement to palynological records obtained from other areas of the Amazon forest region that indicate a steady forested environment for the same period.


Zootaxa | 2004

A new early dinosaur (Sauropodomorpha) from the Caturrita Formation (Late Triassic), Paran Basin, Brazil

Luciano A. Leal; Sérgio A. K. Azevedo; Alexander W.A. Kellner; Átila Augusto Stock da Rosa


Journal of South American Earth Sciences | 2005

Paleoenvironmental and paleoclimatic control on early diagenetic processes and fossil record in Cretaceous continental sandstones of Brazil

Antonio Jorge Vasconcellos Garcia; Átila Augusto Stock da Rosa; Karin Goldberg


Current Science | 2016

Evidence of wildfires in the Late Permian (Changsinghian) Zewan Formation of Kashmir, India

André Jasper; Dieter Uhl; Deepa Agnihotri; Rajni Tewari; Sundeep K. Pandita; José Rafael Wanderley Benício; Etiene Fabbrin Pires; Átila Augusto Stock da Rosa; Gulam D. Bhat; S. S. K. Pillai


Gondwana Research | 2018

U-Pb age constraints on dinosaur rise from south Brazil

Max C. Langer; Jahandar Ramezani; Átila Augusto Stock da Rosa


Journal of South American Earth Sciences | 2015

Wachholz, a new exquisite dinosaur-bearing fossiliferous site from the Upper Triassic of southern Brazil

Rodrigo Temp Müller; Átila Augusto Stock da Rosa; Lúcio Roberto da Silva; Alex Sandro Schiller Aires; Cristian Pereira Pacheco; Ane Elise Branco Pavanatto; Sérgio Dias-da-Silva

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Etiene Fabbrin Pires

Federal University of Tocantins

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Antonio Jorge Vasconcellos Garcia

Universidade do Vale do Rio dos Sinos

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Max C. Langer

University of São Paulo

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Rajni Tewari

Birbal Sahni Institute of Palaeobotany

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Cesar L. Schultz

Universidade Federal do Rio Grande do Sul

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