The earliest palpimanid spider (Araneae: Palpimanidae), from the Crato Fossil-Lagerstätte (Cretaceous, Brazil)

Downen, Matthew R.; Selden, Paul A.

doi:10.1636/joa-s-19-059

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…Another case of successful repatriation is that of Chinese fossils from Australia in 2008 thanks to the efforts of Australian palaeontologist John Long with the help of his Chinese collaborators who worked together with the Australian Federal Police following a request from China in 2004 [ 235 ]. A recently described, new species of spider, Cretapalpus vittari [ 236 ], was repatriated to Brazil only months after publication, together with 35 other undescribed arachnid specimens ( figure 10 ) that were irregularly housed at the University of Kansas, USA [ 237 ]. Repatriation was done voluntarily at request of one of the authors of the study (M. R. Downen) after becoming more familiar with the issues involved with these specimens through information available on social media.…”

Section: Small Steps In the Right Direction And The Repatriation Chal...mentioning

confidence: 99%

Digging deeper into colonial palaeontological practices in modern day Mexico and Brazil

et al. 2022

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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 regulations during the twentieth century to preserve their palaeontological heritage. However, scientific colonialism is still reflected in many publications describing fossil specimens recovered from these countries. Here, we present examples of ‘palaeontological colonialism’ from publications on Jurassic–Cretaceous fossils from NE Mexico and NE Brazil spanning the last three decades. Common issues that we identified in these publications are the absence of both fieldwork and export permit declarations and the lack of local experts among authorships. In Mexico, access to many fossil specimens is restricted on account of these specimens being housed in private collections, whereas a high number of studies on Brazilian fossils are based on specimens illegally reposited in foreign collections, particularly in Germany and Japan. Finally, we outline and discuss the wider academic and social impacts of these research practices, and propose exhaustive recommendations to scientists, journals, museums, research institutions and government and funding agencies in order to overcome these practices.

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Section: Small Steps In the Right Direction And The Repatriation Chal...mentioning

confidence: 99%

Digging deeper into colonial palaeontological practices in modern day Mexico and Brazil

et al. 2022

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“…Some previous studies have relied on exposed internal anatomy of specimens, i.e., through erosion, or mechanical preparation, including destructive sampling (e.g., Secrétan, 1985;Butterfield, 2002;Siveter et al, 2013;Zacaï et al, 2016;Jauvion et al, 2020a;Ortega-Hernández et al, 2022). Technological advances in the last decade have made it possible to non-destructively scan and illustrate the external and internal anatomy of arthropod fossils in great detail, including, among others, eurypterids (Lamsdell et al, 2020), ostracods (Wang et al, 2020), euarthropods (Liu et al, 2020;Laville et al, 2023), spiders (Downen and Selden, 2021), wasps (Szabó et al, 2022), and scorpions (de Carvalho et al, 2022). Decapod crustaceans, major contributors to marine ecosystems since the Mesozoic Decapod Revolution (Klompmaker et al, 2013(Klompmaker et al, , 2015Schweitzer and Feldmann, 2015), have also been studied using newer techniques such as microCT (µCT) to uncover soft tissues (Jauvion et al, 2016(Jauvion et al, , 2020bXing et al, 2021;Luque et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans

Klompmaker,

Kloess,

Jauvion

et al. 2023

Palaeontol Electron

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Cretaceous-aged methane seep carbonates in the Western Interior Seaway, USA, have yielded a relatively high diversity and concentration of fossils, including decapod crustaceans, compared to their surrounding, contemporaneous sediments. With technological advances in non-destructive imaging techniques, the internal anatomy of decapods can be studied in remarkable detail. Here, we present a brachyuran crab specimen from an upper Campanian methane seep carbonate in South Dakota, USA. While the external morphology of the crab is insufficient for species identification (Secretanella sp.), remarkable details of the internal morphology are preserved including soft tissues. Four phyllobranchiate gills are visible due to a broken cuticle. A µCTscan revealed parts of the digestive tract including the esophagus and the cardiac stomach (foregut), and possible anterior gastric muscles. An esophagus has not been reported previously in a fossil decapod. We also found mandibles and their apodemes. Because of soft tissue preservation, the South Dakotan locality may be a candidate Konservat-Lagerstätte. To our knowledge, the studied crab contains the first preserved animal soft tissue reported from an ancient methane seep. Our new overview of internal soft tissues preserved in fossil decapod crustaceans shows that, besides muscles reported previously, gills and remains of the digestive tract are most often reported (8 and 13 occurrences, respectively). Reproductive organs, nerve chords, and the heart are only known from one or two occurrences. Although reports of soft internal anatomy preservation remain relatively rare, continued application of µCT-scans to fossil decapods has the potential to illuminate our knowledge of the evolution of internal decapod anatomy.

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“…A Bacia do Araripe é conhecida nacionalmente e internacionalmente por seus exuberantes e abundantes fósseis em excelente estado de conservação (MAISEY, 1991) com inúmeros registros de flora e fauna, abrangendo microfósseis (COIMBRA et al, 2002) e macrofósseis, desde coprólitos , invertebrados (insetos, aracnídeos, bivalves e conchostráceos) (MARTILL et al, 2007;DOWNEM;SELDEN, 2021), e vertebrados (peixes, anfíbios, quelônios, crocodilomorfos, lagartos, pterossauros e dinossauros) (VIANNA; KELLNER, 2006;SARAIVA et al, 2021. Além de uma paleoflora composta por pteridófitas, gimnospermas e angiospermas (LIMA; SARAIVA, SAYÃO, 2012;BERNARDES-DE-OLIVEIRA et al, 2014;MOHR, 2015;COIFFARDI et al, 2019).…”

Section: Introductionunclassified

Paleontologia - Estado Da Arte Da Formação Barbalha (Grupo Santana) Da Bacia Do Araripe, Nordeste, Brasil

Rebelato

Alves²,

Lima³

et al. 2022

Estudo & Debate

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A Bacia do Araripe é conhecida mundialmente por sua diversidade de fósseis em excelente estado de conservação, que registram a fauna e a flora do Paleozoico ao Mesozoico, depositados durante milhões de anos. A vasta literatura sobre a bacia é concentrada em sua maioria sobre o Mesozoico, com especial interesse ao Grupo Santana, cujo estratos aflorantes são do período Cretáceo, podendo conter lacunas entre seus diferentes sistemas deposicionais. O presente artigo tem como objetivo realizar uma revisão bibliográfica sobre a Formação Barbalha fornecendo o estado da arte e seus gargalos que corresponde a base deste grupo. As bibliografias analisadas indicaram uma predominância de estudos de natureza geológica e uma escassez de trabalhos paleontológicos. Dentre os estudos paleontológicos, a maioria ocorre com microfósseis e a minoria com paleoflora. A carência de estudos fossilíferos para a Formação Barbalha pode estar relacionada aos processos de fossilização, os quais estão diretamente relacionados aos interesses dos pesquisadores em estudar as demais formações, devido a maior qualidade de seu registro fóssil.

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The earliest palpimanid spider (Araneae: Palpimanidae), from the Crato Fossil-Lagerstätte (Cretaceous, Brazil)

Cited by 8 publications

References 28 publications

Digging deeper into colonial palaeontological practices in modern day Mexico and Brazil

Digging deeper into colonial palaeontological practices in modern day Mexico and Brazil

Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans

Paleontologia - Estado Da Arte Da Formação Barbalha (Grupo Santana) Da Bacia Do Araripe, Nordeste, Brasil

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