Daniel Sedorko

Daniel Sedorko
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Daniel verified their affiliation via an institutional email.
Federal University of Rio de Janeiro | UFRJ · Departamento de Geologia e Paleontologia

Professor
-Professor (Adjunct) at Museu Nacional (UFRJ) -Postdoc fellow (von Humboldt) in the Eberhard Karls Universität Tübingen

About

145
Publications
27,297
Reads
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709
Citations
Introduction
My research is focused on trace fossils and their applications. I am also dedicated to Invertebrate Paleontology with a taphonomic approach.
Additional affiliations
March 2013 - February 2015
State University of Ponta Grossa
Position
  • Master's Student
Description
  • Master's student under supervision of Dr. Elvio Bosetti
March 2015 - November 2018
Universidade do Vale do Rio dos Sinos
Position
  • PhD Student
Description
  • PhD student under supervision of Dr. Renata Netto
May 2024 - present
University of Tübingen
Position
  • PostDoc Position
Description
  • PostDoc under supervision of James H. Nebelsick (Department of Geosciences)

Publications

Publications (145)
Article
Previous studies of the Paraná Supersequence (Furnas and Ponta Grossa formations) of the Paraná Basin in southern Brazil have yielded disparate sequence stratigraphic interpretations. An integrated sedimentological, paleontological, and ichnological model was created to establish a refined sequence stratigraphic framework for this succession, focus...
Article
Devonian occurrences of Zoophycos are often observed in successions representing shelfal deposits and have been interpreted as the first expansion of this trace fossil during the Paleozoic. Dense Zoophycos occurrences in storm-generated Paleozoic beds have been interpreted as the result of ecological opportunist strategy when the tracemaker exploit...
Article
The Malvinokaffric Realm is an endemic paleogeographic region that inhabited Gondwanan high latitude seas during Early-Middle Devonian times. The causes for the collapse of this fauna are still debated but seem to be related to a transgressive event during Middle Devonian in the Chaco and Paraná basins in Bolivia and Brazil, which probably generate...
Article
Full-text available
The morphology and architectural design of trace fossils are strongly influenced by substrate characteristics, organism anatomy, and burrowing behavior. In this study, we explore the influence of substrate moisture on preservation variants of mole cricket burrows and discuss its correspondence to previously described ichnogenera. Field observations...
Article
Full-text available
The makers of fossil burrows are rarely found preserved within them; thus, the producers even of common trace fossils are often conjectural. This is particularly the case for trace fossils like Bifungites that have no known modern analogues. From the Devonian Pimenteira Formation of Brazil, we recovered several specimens of this common Palaeozoic i...
Article
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Holocene shell beds along the Brazilian coast provide critical records of sea level variations influenced by climatic changes. This study examines the taphonomic implications of bioerosional traces in bioclastic accumulations from coastal sites in Rio de Janeiro State, Brazil. By integrating sedimentological, taphonomic, and taxonomic data, the rel...
Article
Lingulids are significant infaunal elements of Lower to Middle Devonian in the Paraná Basin, Brazil, with Lingulichnus traces sometimes found in association with in situ lingulids specimens (Lingulida, Brachiopoda). These trace fossils are typically confined to offshore and transitional offshore-to-lower shoreface environments. This study investiga...
Article
Full-text available
This study investigates ichnoassemblages characterized by spreite trace fossils from the Upper Cretaceous Snow Hill Island Formation on Vega Island, Antarctica. The succession reveals alternating heterolithic beds of sandy siltstones to very fine-to fine-grained sandstones, suggestive of a deltaic depositional setting influenced by fluctuating ener...
Conference Paper
Full-text available
No contexto do Projeto-Temático FAPESP No. 20/07997-4 "Explorando a diversidade dos dinossauros do Cretáceo Sul-Americano e suas faunas associadas", foram realizados nos anos de 2023 (03 a 17 de junho) e 2024 (23 de junho a 09 de julho) dois trabalhos de campo para os arredores de Bagua e Bagua Grande, Região do Amazonas, Peru. Os depósitos explora...
Conference Paper
Full-text available
A Formação Snow Hill Island (Campaniano – Maastrichtiano) é uma unidade do Grupo Marambio que aflora nas Ilhas James Ross e Vega da Península Antártica, destacando-se por seu rico conteúdo fossilífero. Coquinas contendo fragmentos de invertebrados e vertebrados e, mais raramente, de vegetais, ocorrem em alguns níveis fossilíferos dessa formação. A...
Conference Paper
Full-text available
One of the key interests in studying trace fossils is their use as environmental proxies due to the strict organism-environment relationship preserved in certain ichnotaxa. This is particularly relevant for the Late Paleozoic Ice Age (LPIA) in Brazil, due to the scarcity of preserved body fossils in most deposits. The Itararé Group (Paraná Basin) r...
Article
Skolithos piperock is prevalent in Cambrian shallow marine deposits but diminishes throughout the Paleozoic. This study reports an interval with Skolithos piperock from the upper Furnas Formation (Lower Devonian), offering insights into the paleoenvironmental interpretation of nearshore sandstones. The studied section comprises eight sedimentary fa...
Conference Paper
Full-text available
A fauna que habitou a região norte da América do Sul durante o Cretáceo ainda é relativamente pouco conhecida. Nas proximidades de Bagua (Região do Amazonas, Peru) afloram depósitos fossilíferos das formações Celendín (Cenomaniano-Campaniano) e Chota (Campaniano-Maastrichtiano), dos quais restos de invertebrados, vertebrados e plantas já foram repo...
Conference Paper
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Paleodeserto Botucatu representa um vasto sistema deposicional eólico seco, formado no ápice da aridificação do Gondwana durante o Mesozoico. Esse depósito, representado por várias unidades correlatas em países da América do Sul e da África, é um marco ambiental significativo. A Formação Botucatu que constitui a parcela brasileira desse sistema, fo...
Article
50 days' free access: https://authors.elsevier.com/a/1kAqk73N%7EEJDK _____________________________________________________________________ The earliest Cretaceous Botucatu Formation (Paraná Basin, Brazil) comprises an erg deposit developed in the central part of Gondwana and is dominated by eolian dune facies. In this paper, we improve understandin...
Article
Full-text available
ICHNIA 2024—The 5th International Congress on Ichnology was held at the Canto da Ilha Hotel and Convention Center from 14 to 19 April, 2024, attracting 105 ichnologists from Africa, Asia, Europe, North America, and South America (Figure 1). The scientific program consisted of three short courses, two workshops, five keynote talks, four days of tech...
Article
Vertebrate burrows serve as windows into the past, revealing the activities of various organisms and providing clues about their paleoenvironmental conditions. This study focuses on a vertebrate paleoburrow from the Três Barras Formation, Minas Gerais state, southeastern Brazil, aiming to detail and reconstruct aspects of the paleoclimatic conditio...
Article
The upper Aptian lower Codó Formation is an attractive stratigraphic unit within the Parnaíba and São Luís basins, northeastern Brazil, formed during the Western Gondwana breakup. Located in a large sag basin, the formation records a dynamic depositional history of marine-influenced deltaic, lacustrine, and sabkha environments. This sedimentary evo...
Article
The Early Cretaceous geological record contains evidence of major and abrupt global environmental changes. Understanding the past water-column redox fluctuations and paleoenvironmental evolution of Early Cretaceous environments is, therefore, pivotal for a better comprehension of this period as a whole. In this sense, to investigate the processes t...
Article
Annelids are relatively rare in the fossil record because they lack a hard skeleton. Here, we report a new occurrence of annelids, Annulitubus fernandesi sp. n. and provide interpretations of its life mode based on taphonomy. The fossils were found both in situ and forming pavements in the upper sandstone beds of the Pimenteira Formation exposed in...
Article
Full-text available
Todos sabem o que é Icnologia, mas, provavelmente, não conhecem por esse nome. Uma pegada na areia da praia ou num chão lamacento é uma estrutura biogênica, um dos focos da Icnologia. E não apenas pegadas: a Icnologia se ocupa do estudo das interações entre organismos e substratos, incluindo escavações, tocas, galerias, evidências de predação, feze...
Article
The Gramame and Maria Farinha formations were deposited in the Paraíba Basin during the Maastrichtian-Danian interval, recording the paleoenvironmental evolution during the opening of the Atlantic Ocean. Despite well-investigated, there is still a need to better understand the bioturbation record and the represented ecological conditions during the...
Article
The study of sedimentary organic matter (SOM) is essential for understanding paleoenvironmental conditions and depositional settings of geological formations. This paper explores the Devonian strata of the Paraná Basin, utilizing SOM analysis to reconstruct paleoenvironments and identify global events. The Devonian period is notable for significant...
Article
Plant fossils serve as critical proxies for interpreting past climates and environments, offering insights into the history of biosphere and climatic conditions. Here we describe a large tracheophyte cast, as well as the sedimentological settings in which it is preserved, expanding the paleobotanical database of the Itararé Group and contributing t...
Article
Fine-grained rocks have historically been interpreted as a product of the settling of fine fractions in low-energy environments. However, recent studies have suggested that in these environments, more dynamic and complex processes operate. These processes involve a much more diverse set of sedimentary processes than those previously assumed. The li...
Article
Full-text available
The sedimentary basins in the Continental Rift of Southeastern Brazil (CRSB) provide an opportunity for ichnological analyses due to its well-known facies relationships and paleoenvironmental interpretations. This study reports invertebrate trace fossils from the Neogene fluvial deposits (Floriano Formation) and applies integrated ichnological and...
Article
Full-text available
T he consolidation of Ichnology as a science: history, concepts, and methods. Ichnology, a science bridging Geology and Biology, has undergone different phases since the initial studies on biogenic structures until its scientific consolidation. The approach to Ichnology as a science in this text raises questions about how to demarcate what is consi...
Article
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The Rio Sambito and São Miguel do Tapuio studied sections are constrained to the Devonian Pimenteira Formation, Parnaíba Basin, being very poorly known when it comes to petrography and diagenesis of its lythotypes. In this sense, this work aims to detail the petrographic features and diagenetic evolution stages. The Pimenteira Formation comprises l...
Conference Paper
Full-text available
The sedimentary basins in the “Continental Rift of Southeastern Brazil” (CRSB) provides an opportunity for ichnological analyses due to its well-established facies relationships and paleoenvironmental interpretations. This study reports invertebrate trace fossils from the Neogene fluvial deposits (Floriano Formation) and applies integrated ichnolog...
Conference Paper
Full-text available
The Itararé Group constitutes an important record of the Late Paleozoic Ice Age (LPIA) in southern Gondwana, with deposits associated with diverse depositional settings in shallow to marginal glacial-marine and glacial-lacustrine environments. Most of the trace fossils from the Itararé Group are represented by arthropod trackways and shallow invert...
Conference Paper
Full-text available
Ichnofossils are still controversial as biostratigraphic markers due to the broad temporal occurrence of most ichnotaxa. However, certain groups with complex behavioral programs and limited temporal intervals have been used in models to determine relative ages [1,2], such as the Proterozoic–Cambrian limit (the Treptichnus pedum Zone [3]. For the Pa...
Conference Paper
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The Taubaté Basin is a sedimentary basin of Paleogene age that is part of the “Continental Rift of Southeast Brazil” derived from the evolution of the Brazilian continental margin [1]. The sedimentary infill is composed of alluvial fan and braided river deposits (Resende Formation), playa lake deposits (Tremembé Formation), and meandering river dep...
Conference Paper
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The study and application of paleosols, in conjunction with ichnology, are still relatively unexplored as tools for paleoenvironmental and paleoecological reconstruction in the Brazilian intracontinental basins. Paleosols are common in the Serra da Galga Member (the upper unit of the Marília Formation, Maastrichtian of the Bauru Basin), whose depos...
Conference Paper
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The amount of animal biomass in modern dune deserts is tied to the primary productivity in the area, steadily increasing when the water input increases, whether by rain or fog [1–3]. There is evidence that life in ancient deserts followed the same ecological strategy [4–6]. Here we analyzed the invertebrate trace fossils in the Botucatu Formation t...
Conference Paper
Full-text available
The Taubaté Basin is located in the Central Segment of the Southeast Brazilian Rift Continental System (RCSB) and presents itself as an elongate, depressed feature with a maximum dimension of 170 km in the eastern state of São Paulo. The basin's sedimentation originated typically from continental processes and underwent pre-rift (Paleogene) and pos...
Conference Paper
Full-text available
Trilobites inhabited most environments of Paleozoic seas, ranging from estuaries to continental slopes, and were globally distributed. Although their functional morphology and phylogenetic relations are established by well-preserved body fossils, the behavior of trilobites has received less attention. Three well-known trace fossils are interpreted...
Article
During the Devonian, the Gondwana occupied areas close to the South Pole and hosted many epicontinental seas, with a benthic fauna dominated by brachiopods. Due to the limited preservation of chronostratigraphic markers (e.g. conodonts and graptolites) on this paleocontinent, the study of ichnology and palynology has helped to track Devonian events...
Conference Paper
Full-text available
The morphology and architectural design of trace fossils are strongly influenced by substrate characteristics, organism anatomy, and burrowing behavior. In this study, we explore the influence of substrate moisture on preservation variants of horizontal to subhorizontal mole cricket burrows and discuss its correspondence to previously described ich...
Article
The near-field glacial record of the late Paleozoic Ice Age in Gondwanan basins is widely used in global paleogeographic and paleoclimatic models. Nevertheless, several late Paleozoic glacial successions still lack a detailed depositional history or reassessment of their genesis under modern glacial sedimentology concepts. One such example is the A...
Preprint
Vertebrate burrows serve as windows into the past, revealing the activities of various organisms and providing clues about their paleoenvironmental conditions. This study focuses on a vertebrate paleoburrow from the Três Barras Formation, Minas Gerais state, southeastern Brazil, aiming to detail and reconstruct aspects of the paleoclimatic conditio...
Poster
A planície Costeira do Rio grande do Sul (PCRS) é uma área construída pela poção emersa da Bacia de Pelotas. A PCRS é caracterizada principalmente por depósitos sedimentares do tipo laguna-barreira. Esses depósitos consistem em corpos lagunares conectados ao mar por pequenos canais denominados de inlets, formando barras arenosas ao longo das linhas...
Article
Full-text available
Trace fossils are not generally utilized as biostratigraphic indicators due to their long stratigraphic ranges. Despite the use of intricate behavioral traces in the absence of other indicators, existing models like the Precambrian–Cambrian boundary and Cruziana stratigraphy encounter limitations due to crucial data gaps and regional constraints. T...
Poster
A Planície Costeira do Rio Grande do Sul ( é uma área constituída pela porção emersa da Bacia de Pelotas A PCRS é caracterizada principalmente por depósitos sedimentares do tipo laguna barreira Esses depósitos consistem em corpos lagunares conectados ao mar por pequenos canais denominados de inlets formando barras arenosas ao longo das linhas de pr...
Article
Trace fossils are important records of the presence and behaviour of animals in the past, especially in deposits where few body fossils are preserved. They tend to provide the main palaeobiological record for past glacial environments, and are thus very important for understanding the ecology of these palaeoenvironments. Two ichnogenera are common...
Article
Full-text available
The genus Lingulapholis had temporal and spatial restrictions during the Devonian, being found only in Colombia and the United States. In Brazil, its related taxa Craniops is common in the Amazonas, Paraná, and Parnaíba basins. New data from the cities of Picos and Itainópolis, east flank of Parnaíba Basin, led to the discovery of a yet previously...
Article
Full-text available
The genus Lingulapholis had temporal and spatial restrictions during the Devonian, being found only in Colombia and the United States. In Brazil, its related taxa Craniops is common in the Amazonas, Paraná, and Parnaíba basins. New data from the cities of Picos and Itainópolis, east flank of Parnaíba Basin, led to the discovery of a yet previously...
Article
Lakes can be classified as open, semi-closed, and closed based on the balance between accommodation space and sediment-water fill. Different lake types can coexist in adjacent basins and rapidly change throughout time from one type to another. Understanding the processes that result from shifts in a lake's hydrological properties can be challenging...
Article
Full-text available
Trilobites inhabited all environments of Paleozoic seas, ranging from estuaries to continental slopes, and were globally distributed. Although their functional morphology and phylogenetic relations are established by well-preserved body fossils, the behavior of trilobites has received less attention. Three well-known trace fossils are interpreted t...
Article
Full-text available
Mato Grosso do Sul has a significant area with Devonian outcrops containing fossils mainly of marine invertebrates, plants and, more rarely, fish fragments of the climax and impoverished Malvinoxhosan (= Malvinokaffric) fauna. Despite this, for a long time the state had a lack in studies related to the Devonian paleontology of the Paraná Basin, onl...
Article
Full-text available
O arcabouço estratigráfico na porção sul da Bacia do Paraná representada pelos estratos do Sistema Devoniano preserva um rico depósito fossilífero. Este depósito é marcado pela presença de uma paleofauna comumente referida como endêmica composta por organismos bentônicos do Domínio Malvinocáfrico. O presente estudo configura a interpretação de uma...
Article
Full-text available
The Rio Grande do Sul Coastal Plain records sea-level oscillations driven by climatic changes during Quaternary glaciations, represented as four lagoon-barrier systems, the last one forming after the last glacial maximum and still active. Marine trace fossils are reported in the Pleistocene deposits, but terrestrial burrows also occur in the eolian...
Conference Paper
Full-text available
Os icnofósseis são classificados como vestígios das interações de organismos extintos com os substratos, sendo elementos importantes em reconstruções paleoambientais. No que se refere a flora, as feições mais comuns são os traços de raízes, denominados de rizólitos. No estado de Minas Gerais, o Grupo Bauru (Bacia Bauru, Cretáceo Superior) apresenta...
Article
Trace fossils in storm-generated beds of shelf siliciclastic settings have been investigated mostly to understand the effect of waves in the infauna distribution. It is possible to identify a post-storm ichnofauna (with features attributable to Skolithos ichnofacies) and a resident ichnofauna (attributable to Cruziana ichnofacies) and this ichnolog...
Article
Full-text available
Vertebrates produce a variety of trace fossils, mostly tracks and trackways, coprolites, and burrows resulting from fossorial and subterranean habits. Burrows, particularly, tend to represent temporary or permanent shelter. Vertebrate burrows are relatively understudied in the Brazilian Mesozoic units, as well as in Cretaceous rocks worldwide. This...
Conference Paper
Full-text available
INTRODUÇÃO Diante do processo de crescimento das cidades e de seu desenvolvimento, muitos pesquisadores notam a falta de manejo nos locais de geoconservação, que acabam resultando na degradação desse patrimônio que, por sua vez, contém histórias do passado, contada por fósseis, icnofósseis, pinturas rupestres ou artefatos. A origem do termo geodive...
Article
Full-text available
The present work analyzes the monotypic Taenidium barretti ichnofabric developed in abandoned channels and floodplains to understand its paleoecological significance in highly seasonal fluvial systems. The data come from the Cretaceous paleosols of the Marília Formation (Bauru Basin, SE Brazil), in which the T. barretti ichnofabric and rhizoliths r...
Conference Paper
Full-text available
A filled burrow is reported from the Adamantina Formation and its implications for the Brazilian late Cretaceous paleoenvironment. The Adamantina Formation is a lithological unit formed by alluvial and river deposits intertwined composed of reddish sandstones. This study aims to analyze a paleoburrow preserved in the Upper Cretaceous deposits of th...
Article
The Glossifungites ichnofacies can be a signature of allogenic processes that demark omission, exhumation, and ravinement or indicate autogenic processes impacting several depositional scenarios, such as incised valleys, submarine gullies and canyons, erosive shoreface, tidal channels, and dewatered muddy substrates. Comparatively, autogenic surfac...
Article
Full-text available
Resumo: A região nordeste do estado do Paraná ainda é pouco conhecida em seus aspectos paleontológicos e estratigráficos. Este trabalho enfocou afloramentos devonianos localizados em Arapoti e Piraí do Sul e buscou o reconhecimento das fácies sedimentares e a definição de tafofácies com a intenção de interpretação paleoambiental e de correlação est...
Article
Full-text available
The Silurian-Devonian strata of the Paraná Basin (southern Brazil) have a wide variety of ichnofossils. The first records date from the beginning of the last century, with pioneering studies in 1912 addressing the Furnas and Ponta Grossa formations. Significant advances in the ichnological knowledge of these units occurred between the 1980s and 199...
Article
Full-text available
In this paper we characterize pecopterids found in deposits of the Passa Dois Group (Upper Permian of the Paraná Basin) in a new outcrop, on the side of the BR-153 road, located at the municipality of Aceguá, Rio Grande do Sul State, Brazil. Pecopterids are common in the Permian paleophytogeogragic realms, signaling interglacial phases of the Late...
Article
Full-text available
Abstract: In this paper we characterize pecopterids found in deposits of the Passa Dois Group (Upper Permian of the Paraná Basin) in a new outcrop, on the side of the BR-153 road, located at the municipality of Aceguá, Rio Grande do Sul State, Brazil. Pecopterids are common in the Permian paleophytogeogragic realms, signaling interglacial phases of...
Article
Full-text available
The northeastern region of the state of Paraná, Brazil, is still little known in its paleontological and stratigraphic aspects. This work focused on Devonian outcrops located in Arapoti and Piraí do Sul and aimed at the recognition of sedimentary facies and the definition of taphofacies, with the intention of paleoenvironmental interpretation and s...
Article
Full-text available
The Silurian-Devonian strata of the Paraná Basin (southern Brazil) have a wide variety of ichnofossils. The first records date from the beginning of the last century, with pioneering studies in 1912 addressing the Furnas and Ponta Grossa formations. Significant advances in the ichnological knowledge of these units occurred between the 1980s and 199...
Article
Full-text available
A área urbana de Ponta Grossa (PR) ocorre sobre um dos mais abundantes campos fossilíferos do país, que registra uma fauna endêmica que ocorreu no Devoniano da Bacia do Paraná. A crescente urbanização da cidade cada vez mais sepulta esses afloramentos, sendo crucial que novas obras tenham acompanhamento de uma equipe especializada para salvaguarda...
Article
Full-text available
A icnofauna dos depósitos do Grupo Itararé aflorantes em Santa Catarina vem sendo registrada desde o trabalho de Maury, em 1927, na cidade de Anitápolis, no sul do estado. Já no sul do estado do Paraná, na região da cidade de Rio Negro, a primeira descrição de assembleias icnofossilíferas foi realizada em 2003 por Balistieri e colaboradores, aprese...
Article
Full-text available
Para valorizar o ensino da Paleontologia, devido à carência de ferramentas de auxílio ao seu ensino no curso de Graduação em Geologia da Universidade Federal de Uberlândia, desenvolveu-se uma ferramenta digital na forma de blog, utilizando os recurso já existentes numa plataforma online gratuita, além de características adicionais elaboradas nas li...
Conference Paper
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Os icnofósseis revestem-se de importância por preservarem comportamentos de animais cujo potencial de preservação é baixo (e.g. corpo mole). Sendo assim, um dos grandes interesses no estudo dos icnofósseis é sua utilização como proxies ambientais, devido à estrita relação organismo-ambiente preservada em alguns icnotáxons. Nesse caso, os icnofóssei...
Article
The long-standing view on the Cretaceous climate zones suggests the inception of an Equatorial Humid Belt (EHB) in the Albian. This inception contrasts with recent sedimentological and palynological evidence of sustained low-latitude, wetter paleoenvironment in the South American and African landmasses during the Aptian. The trigger for this early-...
Article
Full-text available
Biomineralized and organic metazoan tubular skeletons are by far the most common in the fossil record. However, several groups of organisms are also able to agglutinate particles to construct more rigid structures. Here we present a novel type of agglutinated tube from the austral and endemic palaeobiota of the Malvinokaffric realm (Devonian, Brazi...
Article
The Late Paleozoic Ice Age (LPIA) in Brazil has an extended sedimentary record, mainly in the Paraná Basin. Ichnological records are the main biotic evidence in such an environment, and the Itararé Group (Paraná Basin) is important in this regard. However, the Aquidauana Formation, one of the formations in the Itararé Group, is understudied regardi...
Data
Supplementary Material of 'Ichnological aspects of the Aquidauana Formation (Upper Carboniferous, Itararé Group, Brazil): An arthropod-colonized glacial setting'
Data
Script author: Gabriel E. B. de Barros Git: https://github.com/gabrielbarea ########################################## Scripts in 'Ichnological aspects of the Aquidauana Formation (Upper Carboniferous, Itararé Group, Brazil): an arthropod-colonized glacial setting' Scripts and data used for statistical analysis and graphic production of the pap...
Article
Marine sediments deposited during late Miocene transgressive events are recorded over large onshore areas in southeastern South America, characterizing the “Entrerriense Sea”. In Uruguay, these deposits crop out at the coast of the Department of Colonia, and are assigned to the Camacho Formation, which is well-known by its abundant fossil content....
Article
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 (...