The Upper Jurassic Stanleyville Group of the eastern Congo Basin: An example of perennial lacustrine system

Caillaud, Alexis; Blanpied, Christian; Delvaux, Damien

doi:10.1016/j.jafrearsci.2017.05.002

Cited by 13 publications

(3 citation statements)

References 23 publications

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“…Previously, this formation was assumed to be Aalenian-Bathonian in age, which would have made this fish the oldest freshwater occurrence for pycnodonts. However, there is strong evidence that the Stanleyville Formation is actually Late Jurassic-Early Cretaceous (Kimmerdigian to Barremian-Valanginian) in age (see [33,34] for arguments). While the material of C. cornutus is fragmentary, the association of such bones together indicates that these remains represent the earliest known representative of the Coccodontoidea [35], a pycnodont clade containing highly derived armored pycnodonts such as Coccodontidae [36,37], Gladiopycnodontidae [35], and Gebrayelichthyidae [38], which are otherwise only found in the famous Cenomanian (Upper Cretaceous) marine limestone deposits of Lebanon.…”

Section: Africamentioning

confidence: 99%

The Fossil Record and Diversity of Pycnodontiform Fishes in Non-Marine Environments

Cawley,

Kriwet

2024

Diversity

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Pycnodont fishes were a successful clade of neopterygian fishes that are predominantly found in shallow marine deposits. However, throughout their long 180 million year reign (Late Triassic–end Eocene), they made multiple incursions into both brackish and freshwater environments. This fossil record mostly consists of fragmentary dental material, but articulated specimens are known from Early Cretaceous lacustrine localities in Spain. This review article aims to document all non-marine occurrences of Pycnodontiformes throughout most of the Mesozoic and early Paleogene. This review highlights two interesting trends in the history of non-marine habitat colonization by pycnodonts: (1) a huge spike in non-marine occurrences during the Cretaceous; and (2) that most occurrences in non-marine localities occurred at the latest Cretaceous period, the Maastrichtian. The high number of colonization events within the Cretaceous lines up with extreme climatic events, such as high temperatures resulting in high sea levels which regularly flooded continental masses, allowing pycnodonts easier access to non-marine habitats. The increased presence of pycnodonts in brackish and freshwater habitats during the Maastrichtian might have played a role in their survival through the K/Pg extinction event. Freshwater habitats are not as vulnerable as marine ecosystems to environmental disturbance as the base of their food chain relies on detritus. Pycnodonts might have used such environments as a refuge and began to occupy marine waters after the K/Pg extinction event.

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Section: Africamentioning

confidence: 99%

The Fossil Record and Diversity of Pycnodontiform Fishes in Non-Marine Environments

Cawley,

Kriwet

2024

Diversity

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show abstract

“…Previously, this formation was assumed to be Aalenian-Bathonian in age, which would have made this fish the oldest freshwater occurrence for pycnodonts. However, there is strong evidence that the Stanleyville Formation is actually Late Jurassic to Early Cretaceous (Kimmerdigian to Barremian-Valanginian) in age see [33,34] for arguments. While the material of C. cornutus is fragmentary, the association of such bones together indicated that these remains represent the earliest known representative of the Coccodontoidea [35], a pycnodont clade containing highly derived armored pycnodonts such as Coccodontidae [36,37] Gladiopycnodontidae [35] and Gebrayelichthyidae [38], which are otherwise only found in the famous Cenomanian (Upper Cretaceous) marine limestone deposits of Lebanon.…”

Section: Africamentioning

confidence: 99%

The Fossil Record and Diversity of Pycnodondiform Fishes in Non-Marine Environments

Kriwet,

Cawley

2024

Preprint

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Pycnodont fishes were a successful clade of neopterygian fishes that are predominantly found from shallow marine deposits. However, throughout their long 180 million years reign (Late Triassic - end Eocene), they have made multiple incursions into both brackish and freshwater environments. This fossil record mostly consists of fragmentary dental material but articulated specimens are known from Early Cretaceous lacustrine localities in Spain. This review article aims to document all non-marine occurrences of Pycnodontiformes throughout most of the Mesozoic and early Palaeogene. This review highlights two interesting trends in the history of non-marine habitat colonization by pycnodonts: (1) a huge spike in non-marine occurrences during the Cretaceous, (2) the most occurrences in non-marine localities occurred at the latest Cretaceous, the Maastrichtian. The high number of colonization events within the Cretaceous lines up with extreme climatic events such as high temperatures resulting in high sea levels which regularly flooded continental masses, allowing pycnodonts easier access to non-marine habitats. The increased presence of pycnodonts in brackish and freshwater habitats during the Maastrichtian might have played a role in their survival through the K/Pg extinction event. Freshwater habitats are not as vulnerable as marine ecosystems to environmental disturbance as the base of their food chain relies on detritus. Pycnodonts might have used such environments as a refuge and began to occupy marine waters after the K/Pg extinction event.

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“…An incomplete fish from the currently considered lacustrine Upper Jurassic Lime Fine beds of Songa [95] was identified as Caturus sp. by Saint-Seine & Casier [96].…”

Section: Diversity Of Caturids Through Timementioning

confidence: 99%

Taxonomic status of the caturid genera (Halecomorphi, Caturidae) and their Late Jurassic species

López‐Arbarello

Ebert

2023

R. Soc. open sci.

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Caturids are among the best-known predatory ray-finned fishes of the Mesozoic. Although there is consensus about their sister-group relationship to Amiidae (Holostei, Amiiformes), their diversity, ingroup phylogenetic relationships and evolutionary history are still very poorly understood. Caturidae is currently restricted to Caturus and Amblysemius , each with two species. Among them, C. furcatus has become the wastebasket taxon for the group. Our revision of nearly 40 species based on the original descriptions, type and referred material led to significant results changing the picture of caturid diversity in the Late Jurassic. Four specific names are unavailable. Due to insufficient information in the original descriptions, lack of diagnostic features in the type material, or the complete lack of type material, 13 nominal species are nomina dubia. Two species currently considered junior synonyms represent distinct taxa. Strobilodus giganteus is removed from Caturidae. Caturus cliftoni , Thlattodus and Ditaxiiodus are tentatively referred to Strobilodus . The fossil record of Caturoidea is restricted to the Jurassic and earliest Cretaceous. The group apparently underwent significant diversification during the Late Jurassic, as indicated by the increase in the number of taxa and the dispersal of the group outside Europe, which had already begun in the Middle Jurassic.

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The Upper Jurassic Stanleyville Group of the eastern Congo Basin: An example of perennial lacustrine system

Cited by 13 publications

References 23 publications

The Fossil Record and Diversity of Pycnodontiform Fishes in Non-Marine Environments

The Fossil Record and Diversity of Pycnodontiform Fishes in Non-Marine Environments

The Fossil Record and Diversity of Pycnodondiform Fishes in Non-Marine Environments

Taxonomic status of the caturid genera (Halecomorphi, Caturidae) and their Late Jurassic species

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