New Fossiliferous Sites of the Romualdo Formation, Lower Cretaceous, Araripe Basin, Exu, Pernambuco, Northeast of Brazil

Duque, Rudah R.C.; Barreto, Alcina Magnólia Franca

doi:10.11137/2018_1_05_14

Cited by 4 publications

(4 citation statements)

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“…Segundo Polck et al (2015), estas espécies de peixes seriam duas das três mais comuns e abundantes da Bacia do Araripe. Em Exu, a afirmação também é verdadeira, sendo V. comptoni o táxon mais comum da fauna de vertebrados do município, seguido por R. buccalis (Duque & Barreto, 2018).…”

Section: Resultsunclassified

“…Vinctifer comptoni e Rhacolepis buccalis são espécies de peixes comuns no Aptiano-Albiano das bacias sedimentares do Nordeste brasileiro, estando presente nas formações Romualdo, Bacia do Araripe (Maisey, 1991;Duque & Barreto, 2018;Lopes & Barreto, 2019), Codó, Bacia do Parnaíba (Brito et al, 2016;Lindoso et al, 2016) e, Riachuelo, Bacia de Sergipe (Gallo et al, 2012;Arai, 2014).…”

Section: Distribuição Paleogeográficaunclassified

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A incomum associação de peixes e caranguejos da Formação Romualdo, Aptiano-Albiano da Bacia sedimentar do Araripe, NE do Brasil

Prado¹,

Lopes²,

Pereira³

et al. 2021

Rev. bras. paleontol.

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The unusual association of fish and crabs from Romualdo Formation, Aptian–Albian of the Araripe sedimentary Basin, NE Brazil. In a study and collection of fossils from the Romualdo Formation in “Araripe pernambucano”, an association of Vinctifer comptoni and Rhacolepis buccalis with eubrachyurans and orithopsids crabs was observed in four calcareous nodules. Associations were discussed based on ecological and taphonomic hypotheses. It is noted from the degree of articulation of the organisms, that either the death or the availability of crab moults in the sediment possibly occurred before the death of the fish. In addition, the fish do not have teething consistent with feeding on crabs. Thus, this association would occur due to fossilization processes and not due to ecological interactions. The study also emphasized systematic and paleogeographic aspects of the groups. Romualdocarcinus salesi is probably related to the “higher” true crabs (Eubrachyura), a hypothesis already raised in previous works, due to the preservation of its dorsal carapace next to a pleon of subquadrangular shape similar to those seen in this group. The occurrence of Exucarcinus gonzagai associated with fish, in concretions in the shales, can raise the question of E. gonzagai and Araripecarcinus ferreirai species as synonyms. The data obtained with the survey of the paleogeographic distribution of fish and crabs in geological formations of correlated age corroborates the hypothesis of the Tethyan marine influence in Araripe. Keywords: ichthyolites, decapods, paleoecology, taphonomy, Santana Group, Cretaceous.

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Section: Resultsunclassified

Section: Distribuição Paleogeográficaunclassified

A incomum associação de peixes e caranguejos da Formação Romualdo, Aptiano-Albiano da Bacia sedimentar do Araripe, NE do Brasil

Prado¹,

Lopes²,

Pereira³

et al. 2021

Rev. bras. paleontol.

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“…In the western portion of the Araripe Basin in Pernambuco state, there are higher occurrences of outcrops from the Ipubi and Romualdo formations. This is primarily due to extensive mining activities focused on extracting gypsum from the Ipubi Formation, which has resulted in the exposure of rocks from these two stratigraphic units (Duque & Barreto 2018). In the municipality of Araripina in Pernambuco state, one of the most famous outcrops of the Romualdo Formation in Pernambuco is present.…”

Section: Introductionmentioning

confidence: 99%

An Unusual Fossiliferous Site in the Romualdo Formation in the Socorro Basin (Northeast Brazil)

Barros,

Saraiva,

Oliveira

et al. 2023

Anu. Inst. Geociênc.

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The Santana Group, from the base to the top, comprises the Barbalha, Crato, Ipubi, and Romualdo formations. Calcareous concretions from the Romualdo Formation are found in the Araripe Basin, but the geographic extension of this sequence has evidence in the Socorro Basin on the border of the state of Pernambuco; however, these areas outside of the Araripe Basin have rarely been investigated. The purpose of this research was to carry out a data survey of fossils collected in the Romualdo Formation from the Socorro/Santo Ignácio Basin area that were found in the northeastern portion of Ouricuri municipality in the state of Pernambuco; a new fossiliferous site, known as the Cara Branca site, is reported. Samples were collected from the surface and often in the off-season. This area is cleared by tractors for planting, either exposing fossils or moving some of the fossils. This disturbance reinforces the need for fossil rescues and excavations in this area, where weathering, agricultural machinery, and erosion can damage the fossil record. According to the initial paleontological sampling, the obtained taphonomic information pointed to rapid burial, and the degrees of disarticulation observed in some specimens indicated that disarticulation occurred through necrolysis.

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“…Elopomorpha are mostly represented in Laurasian fossil localities throughout the Mesozoic and Cenozoic (Estes, 1969;Applegate, 1970;Nessov, 1981;Case and Schwimmer, 1988;Cicimurri, 2007). Fewer Mesozoic fossil elopomorphs have been described from Gondwanan deposits (Hector, 1874;da Silva Santos, 1971;Noubhani and Cappetta, 1994;Ostrowski, 2012;Cappetta et al, 2014;Halliday et al, 2016;Duque and Barreto, 2018).…”

Section: Introductionmentioning

confidence: 99%

Late Cretaceous Elopomorpha (Actinopterygii: Teleostei) from the Mahajanga Basin of Madagascar and impacts on paleobiogeography

Ostrowski¹

2021

Palaeontol Electron

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The Upper Cretaceous deposits of Madagascar have produced a rich terrestrial vertebrate fauna. Studies of Madagascar's endemic fossils and recent fauna have led to multiple hypotheses surrounding the origin of these clades on the island following its complete isolation 88 m.y.a. This report is the first published description of several representatives of fossil Elopomorpha (Teleostei) from the Late Cretaceous of Madagascar. Elopomorphs are primarily marine fishes and one of the most morphologically diverse groups within teleosts. Fragmentary fossil elopomorph elements often consist of tooth plates and vertebrae. The tooth plates and dentary reported here are diagnostic and identifiable to the generic classification of Albula, Egertonia, and Paralbula. The vertebrae are numerous and morphologically variable, which indicates the abundance and importance of elopomorphs in the coastal environment of Madagascar during the Late Cretaceous. Most Cretaceous elopomorphs are from localities in the Northern Hemisphere. While several species of Cretaceous elopomorphs are also found in the Southern Hemisphere, there are not as many in number or kind. These Madagascar fossils represent the oldest Albula and Paralbula fossils recorded from Gondwana, increasing their known spatial range. The Egertonia material described here represents one of the earliest occurrences of the genus, adding to its record during the Cretaceous of Gondwana. The presence of these fishes supports a more global distribution of these genera during the Late Cretaceous and a higher diversity of Elopomorpha in the Southern Hemisphere during the Mesozoic than previously documented.

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New Fossiliferous Sites of the Romualdo Formation, Lower Cretaceous, Araripe Basin, Exu, Pernambuco, Northeast of Brazil

Cited by 4 publications

References 0 publications

A incomum associação de peixes e caranguejos da Formação Romualdo, Aptiano-Albiano da Bacia sedimentar do Araripe, NE do Brasil

A incomum associação de peixes e caranguejos da Formação Romualdo, Aptiano-Albiano da Bacia sedimentar do Araripe, NE do Brasil

An Unusual Fossiliferous Site in the Romualdo Formation in the Socorro Basin (Northeast Brazil)

Late Cretaceous Elopomorpha (Actinopterygii: Teleostei) from the Mahajanga Basin of Madagascar and impacts on paleobiogeography

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