First occurrence of Distobatus Werner, 1989 (Elasmobranchii: Hybodontiformes) in the middle Cretaceous (Albian–Cenomanian) of Brazil: Taxonomic and biogeographical implications

Cretaceous Research, Journal Year: 2025, Volume and Issue: unknown, P. 106119 - 106119

Published: March 1, 2025

Language: Английский

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Phylogenomic and anatomical evidence for the Late Cretaceous diversification of African characiform fishes, including a new family, under the influence of the Trans-Saharan Seaway

Evolutionary Journal of the Linnean Society, Journal Year: 2024, Volume and Issue: 3(1)

Published: Jan. 1, 2024

Abstract Geological evidence supports the occurrence of an epicontinental Trans-Saharan Seaway bisecting African continent during Late Cretaceous to early Palaeogene. The seaway formed a wide saltwater channel connecting Neotethys with South Atlantic, yet no previous study has investigated its impact on freshwater fish diversification. Phylogenomic data and time-calibrated trees indicate signature for appearance three modern lineages characiform fishes. Phylogenetic analyses using ultraconserved elements 83 characiforms reveal that Alestidae, Hepsetus, Lepidarchidae fam. nov. originated Santonian–Campanian (84–77.5 Mya). consists two monotypic taxa not previously recognized as sister species: Niger tetra Arnoldichthys endemic lower Ogun rivers Nigeria, dwarf jellybean Lepidarchus from coastal Ghana, Côte d’Ivoire, Liberia, Sierra Leone, Guinea. Microcomputed tomography scans 117 provide novel morphological characters supporting Hepsetus Lepidarchidae, four monophyly five restricted Alestidae. divergence indicates allopatric speciation processes influenced by Seaway, partitioning ichthyofauna in west–east orientation. timing cladogenesis aligns Cenomanian fossil record is ~16–23 Myr younger than earliest characiform-like fossils outcrops Morocco Sudan. This highlights magnitude transgression events shaping biota gaps our understanding evolutionary history palaeobiogeography ray-finned fishes across continent.

Language: Английский

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Comment on “A Saharan fossil and the dawn of Neotropical armoured catfishes in Gondwana” by Brito et al

Gondwana Research, Journal Year: 2024, Volume and Issue: 133, P. 267 - 269

Published: Sept. 1, 2024

Language: Английский

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First record of Aegyptobatus (Hybodontiformes: Distobatidae) in the Cretaceous Alcântara formation (?Albian-Cenomanian) of Maranhão, Northeastern Brazil

Historical Biology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 7

Published: July 26, 2024

Hybodontiformes are considered the closest relatives of modern sharks and were dominant shark group throughout most Mesozoic. Although, originally a marine group, during their long temporal range, they conquered freshwater environment. This is case numerous taxa known in northern Gondwana. Here, we report presence hybodontiform Aegyptobatus Albian-Cenomanian Alcântara Formation São Luis Basin, Northeastern Brazil. A comparison made with other teeth from Northern Gondwana suggests that noticeably same species found late Cenomanian Bahariya Egypt, A. kuehnei. Although probably restricted to freshwater, new discovery increases geographic range this taxon, adds one more common taxon between Brazilian Cretaceous units North Africa, extends down into Albian-Cenomanian.

Language: Английский

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Reply to Comment on , A Saharan fossil and the dawn of the Neotropical armoured catfishes in Gondwana by Britz, Pinion, Kubicek and Conway

Gondwana Research, Journal Year: 2024, Volume and Issue: 133, P. 348 - 351

Published: June 24, 2024

Language: Английский

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