A new late devonian fish fauna from Northeastern Brazil

Rezende, João Marcelo Pais de; Figueroa, Rodrigo T.; Ponciano, Luiza Corral Martins de Oliveira; Gallo, Valéria

doi:10.1080/08912963.2020.1868452

Cited by 5 publications

(4 citation statements)

References 48 publications

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“…Isolated jaw elements, body impressions and scales from Famennian deposits in South Africa likely represent a single actinopterygian amid a diverse array of other fishes (Gess & Whitfield, 2020), while renewed prospecting in the contemporary Maïder Basin in Morocco has produced remains of a single articulated actinopterygian (Frey et al, 2018) amongst its well-known placoderm and chondrichthyan assemblages. New South American discoveries include evidence of a stegotrachelid actinopterygian from the Frasnian of Colombia (Olive et al, 2019), the first actinopterygian remains from the Devonian of the Parnaíba Basin of Brazil (Pais de Rezende et al, 2021), and a new circumpolar species from the Middle Devonian (Figueroa, Weinschütz, & Friedman, 2021). As in other localities, non-actinopterygian fishes dominate these faunas (Janvier, 2007;Janvier & Maisey, 2010;Figueroa & Machado, 2018).…”

Section: Diversity (1) Past Studiesmentioning

confidence: 99%

The early diversification of ray-finned fishes (Actinopterygii): hypotheses, challenges and future prospects

Henderson¹,

Dunne²,

Fasey³

et al. 2022

Preprint

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Actinopterygii are the most speciose living vertebrate clade, and study of fossil members during their Palaeozoic rise to dominance has a long history of descriptive work. Although research interest into Palaeozoic actinopterygians has increased in recent years, broader patterns of diversity and diversity dynamics remain critically understudied. Past studies have investigated macroevolutionary trends in Palaeozoic actinopterygians in a piecemeal fashion, variably using existing compendia of vertebrates or literature-based searches, and there is no comprehensive occurrence-based dataset of actinopterygians spanning the whole of the Palaeozoic. Past studies typically show low levels of diversity in the Devonian with a substantial rise in the early Carboniferous in the aftermath of the end-Devonian mass extinction. However there are unresolved patterns reported for the later Carboniferous and Permian. In large part, these conflicts span from a lack of publicly-available occurrence data: actinopterygians are majorly underrepresented in the Paleobiology Database (PBDB), for example, obscuring patterns of diversity through time. This is exacerbated by major taxonomic problems pervading the Palaeozoic actinopterygian record. Innumerable taxa are lumped into wide-ranging families and poorly-formulated genera, with a vast number of described species concentrated in several particularly problematic ‘waste-basket’ genera. This taxonomic confusion feeds into a limited understanding of phylogenetic relationships. There is also a heavy sampling bias towards Europe and North America, with other regions underrepresented despite yielding important occurrences. Scrutiny of the extent to which spatial biases influence the record is lacking, as is research on other forms of bias. Low richness in some time periods may be linked to geological biases, while the effect of taphonomic biases on Palaeozoic actinopterygians have not yet been investigated. Efforts are already underway to both redescribe poorly defined taxa and describe taxa from underrepresented regions, helping address taxonomic issues and accuracy of occurrence data. New methods of sampling standardisation utilising up-to-date occurrence databases will be critical in teasing apart biological changes in diversity from those resulting from bias. Lastly, continued phylogenetic work will enable the use of phylogenetic comparative methods to elucidate the origins of actinopterygian biogeography and subsequent patterns of radiation throughout their rise to dominate aquatic faunas.

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Section: Diversity (1) Past Studiesmentioning

confidence: 99%

The early diversification of ray-finned fishes (Actinopterygii): hypotheses, challenges and future prospects

Henderson¹,

Dunne²,

Fasey³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Isolated jaw elements, body impressions and scales from Famennian deposits in South Africa likely represent a single actinopterygian amid a diverse array of other fishes (Gess & Whitfield, 2020 ), while renewed prospecting in the contemporary Maïder Basin of Morocco has produced remains of a single articulated actinopterygian (Frey et al ., 2018 ) amongst its well‐known placoderm and chondrichthyan assemblages. New South American discoveries include evidence of a stegotrachelid actinopterygian from the Frasnian of Colombia (Olive et al ., 2019 ), the first actinopterygian remains from the Devonian of the Parnaíba Basin of Brazil (Pais de Rezende et al ., 2021 ), and a new circumpolar species from the Middle Devonian (Figueroa, Weinschütz & Friedman, 2021 ). As in other localities, non‐actinopterygian fishes dominate these faunas (Janvier, 2007 ; Janvier & Maisey, 2010 ; Figueroa & Machado, 2018 ).…”

Section: Current Hypotheses Of P Alaeozoic Actinop...mentioning

confidence: 99%

The early diversification of ray‐finned fishes (Actinopterygii): hypotheses, challenges and future prospects

et al. 2022

View full text Add to dashboard Cite

Actinopterygii makes up half of living vertebrate diversity, and study of fossil members during their Palaeozoic rise to dominance has a long history of descriptive work. Although research interest into Palaeozoic actinopterygians has increased in recent years, broader patterns of diversity and diversity dynamics remain critically understudied. Past studies have investigated macroevolutionary trends in Palaeozoic actinopterygians in a piecemeal fashion, variably using existing compendia of vertebrates or literature‐based searches. Here, we present a comprehensive occurrence‐based dataset of actinopterygians spanning the whole of the Palaeozoic. We use this to produce the first through‐Palaeozoic trends in genus and species counts for Actinopterygii. Diversity through time generally tracks metrics for sampling, while major taxonomic problems pervading the Palaeozoic actinopterygian record obscure diversity trends. Many described species are concentrated in several particularly problematic ‘waste‐basket’ genera, hiding considerable morphological and taxonomic diversity. This taxonomic confusion also feeds into a limited understanding of phylogenetic relationships. A heavy sampling bias towards Europe and North America exists in both occurrence databases and available phylogenetic matrices, with other regions underrepresented despite yielding important data. Scrutiny of the extent to which spatial biases influence the actinopterygian record is lacking, as is research on other forms of bias. Low richness in some time periods may be linked to geological biases, while the effects of taphonomic biases on Palaeozoic actinopterygians have not yet been investigated. Efforts are already underway both to redescribe poorly defined taxa and to describe taxa from underrepresented regions, helping to address taxonomic issues and accuracy of occurrence data. New methods of sampling standardisation utilising up‐to‐date occurrence databases will be critical in teasing apart biological changes in diversity and those resulting from bias. Lastly, continued phylogenetic work will enable the use of phylogenetic comparative methods to elucidate the origins of actinopterygian biogeography and subsequent patterns of radiation throughout their rise to dominate aquatic faunas.

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“…Brazil and Bolivia) [10,11,45], the Falkland Islands [46] and South Africa [47]. Even in Late Devonian high-latitude localities postdating dissolution of the Malvinokaffric Realm, actinopterygians remains rare and represented mostly by fragments of little taxonomic value [47][48][49][50]. Austelliscus hints that the littlestudied circumpolar region might have been an important area for early divergences in actinopterygian evolution, potentially accounting for the sparse early record of Devonian ray-finned fishes captured by better-known sites at lower palaeolatitudes.…”

Section: Discussionmentioning

confidence: 99%

The oldest Devonian circumpolar ray-finned fish?

2021

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Actinopterygians (ray-finned fishes) are the most diverse group of living fishes, but have a sparse Devonian fossil record restricted to low palaeolatitudes. Here we report a new actinopterygian from the Paraná Basin of Brazil, which occupied a circumpolar position in the Palaeozoic. Available geological evidence supports a Middle Devonian or older age for this taxon, which shares features of the mandibular symphysis with the latest Devonian Tegeolepis . A phylogenetic analysis resolves these two as sister taxa. This new record expands the palaeogeographic distribution of Devonian ray-fins and suggests that gaps in their fossil record might be filled by exploring poorly sampled high-latitude localities within the Malvinokaffric Realm.

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A new late devonian fish fauna from Northeastern Brazil

Cited by 5 publications

References 48 publications

The early diversification of ray-finned fishes (Actinopterygii): hypotheses, challenges and future prospects

The early diversification of ray-finned fishes (Actinopterygii): hypotheses, challenges and future prospects

The early diversification of ray‐finned fishes (Actinopterygii): hypotheses, challenges and future prospects

The oldest Devonian circumpolar ray-finned fish?

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