Cratonaia novaolindensis gen. et sp. nov. (Unionida, Silesunionoidea) from the Aptian of Brazil (Araripe Basin), and its implications for the early evolution of freshwater mussels

Silva, Victor R. da; Varejão, Filipe Giovanini; Matos, Suzana Aparecida; Fürsich, Franz T.; Skawina, Aleksandra; Schneider, Simon; Warren, Lucas Veríssimo; Assine, Mário Luís; Simões, Marcello Guimarães

doi:10.1016/j.cretres.2019.104275

Cited by 9 publications

(14 citation statements)

References 38 publications

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“…The sedimentary facies, microfossil and trace fossil content, and stratigraphic architecture of the Crato Formation attest to local influences of marginal marine sedimentation (Varejão 2019), suggesting that the depositional history of this unit is much more complex than previously thought. Also, marine bivalves have been pointed to exist in a muddy interval immediately above the Konservat-Lagerstätte (Barbosa et al 2004, Bruno andHessel 2006), although there is no formal description of them (see discussion in Silva et al 2020aSilva et al , 2020b.…”

Section: Introductionmentioning

confidence: 99%

Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil)

et al. 2021

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The Aptian Crato Formation is world renowned for its well-preserved fossils in microbially-induced laminated limestones, which are regarded as one of the main Cretaceous Konservat-Lagerstätte of the geological record. Detailed stratigraphic investigation and mapping of the up to 90-m-thick Crato Formation at the eastern border of the Araripe Plateau allowed recognition of a regionally persistent fossil-bearing muddy interval, herein defined as the Caldas Bed. At its type locality, it is defined as an up to 2-m-thick coarsening-upward succession of grey/green mudstone and interbedded sandy siltstone and claystone. The 0.85-to 2-m-thick interval was recognized in several localities along the outcrop belt, and it is bounded by sharp, lower (Konservat-Lagerstätte limestone) and upper (sandstone and heterolithic facies) contacts. Despite previous literature data suggesting the presence of marine mollusks, the bed contains freshwater bivalves, small gastropods, spinicaudatans, plant remains, trace fossils, and rare ostracods. The Caldas Bed records benthic paleocommunities representing a short-term isochronous regional freshening event, marked by abrupt changes in sedimentation pattern, bathymetry, salinity, oxygenation and water chemistry.

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Section: Introductionmentioning

confidence: 99%

Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil)

et al. 2021

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“…Palaeogeographic reconstitution of the north‐eastern Brazil during deposition of the Crato Formation (modified from Silva et al ., 2020a). …”

Section: Discussionmentioning

confidence: 99%

“…Five sections were measured in the Araripe Basin and two drill cores (2-TN-3a-BA and 2-TN-SM-BA) were described in the Tucano Basin. Sedimentological and geochemical data from the Jatob a Basin were compiled from the literature (Gratzer et al, 2013), and part of the stable isotope data from the Tucano Basin was provided by Silveira et al (2014). The sections are described in high detail (1:20).…”

Section: Methodsmentioning

confidence: 99%

“…Yet, the isolated valves are common in a convex-up posture. The bivalves are regarded as non-marine forms (Unionida, Silva et al, 2020aSilva et al, , 2020b). In the north-western areas (see Fig.…”

Section: Descriptionmentioning

confidence: 99%

“…The muddy succession is interpreted to be deposited in a freshwater lacustrine system based on the abundance of non‐marine forms (for example, Unionida; Silva et al ., 2020a,b) and the oxygen isotopic composition (Varejão et al ., 2021). Low δ 13 C values suggest lower primary productivity in surface waters, compared to those observed in FA‐4 (see Armstrong & Brasier, 2005).…”

Section: Facies Associationsmentioning

confidence: 99%

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Mixed siliciclastic–carbonate sedimentation in an evolving epicontinental sea: Aptian record of marginal marine settings in the interior basins of north‐eastern Brazil

et al. 2021

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The Aptian evaporitic transitional sequence (sag phase) of the Brazilian marginal basins records the first connection between the Central and South Atlantic oceans in the equatorial area. During this phase, lacustrine carbonate reservoirs and giant salt deposits developed in the southern basins of Santos and Campos, forming world-class petroleum reservoirs. The sag succession is also well-preserved in the interior rift basins of north-eastern Brazil, where upper Aptian strata are represented by a continuous section. This contribution presents an interpretation of the evolution of a third-order depositional sequence comprising lacustrine limestones, marine siliciclastic facies and evaporite deposits of the intracontinental Araripe Basin. The Lowstand Systems Tract is characterized by fluvial deposits filling accommodation generated during the syn-rift phase. The overlying deposits comprise marine facies with preservation of dinoflagellates and marine ichnotaxa, evidencing marine deposition in bayhead delta settings. The transgressive surface is represented by limestones, including the Konservat-Lagerst€ atte laminites, onlapping the basement rocks. Above, tide-dominated bay deposits with distinct subtidal, intertidal and supratidal portions are recorded. The Maximum Flooding Surface is a dark shale below foreshore to shoreface facies, marking the beginning of the Highstand Systems Tract, culminating with deposition of evaporites (gypsum and anhydrite). The stratigraphic architecture and palaeocurrents measured in different facies associations suggest that marine waters reached the basin from the south. The data unequivocally records late Aptian marine ingressions of an incipient South Atlantic Ocean over the interior basins of north-eastern Brazil, while lacustrine conditions were still prevailing in the Pre-Salt sag units of the Santos and Campos basins.

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Evolutionary History of Bivalves as Parasites

Skawina

2021

Topics in Geobiology

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Cratonaia novaolindensis gen. et sp. nov. (Unionida, Silesunionoidea) from the Aptian of Brazil (Araripe Basin), and its implications for the early evolution of freshwater mussels

Cited by 9 publications

References 38 publications

Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil)

Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil)

Mixed siliciclastic–carbonate sedimentation in an evolving epicontinental sea: Aptian record of marginal marine settings in the interior basins of north‐eastern Brazil

Evolutionary History of Bivalves as Parasites

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