A fish assemblage from an early Miocene horizon from Jabal Zaltan, Libya

Argyriou, Thodoris; Cook, Todd D.; Muftah, Ahmed M.; Pavlakis, Paris; Boaz, Noel T.; Murray, Alison M.

doi:10.1016/j.jafrearsci.2014.11.008

Cited by 32 publications

(29 citation statements)

References 41 publications

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“…The molecular clock was calibrated based on early Miocene (ca. 18 Ma) fossilized dentition attributable to Distichodus recovered from deposits of the Maradah Formation in Jabal Zaltan, Libya, by far the oldest fossil unambiguously assignable to the genus [35]. In fact, this fossil pushes back the first known appearance of Distichodus in the fossil record by 10 Ma with respect to the Distichodus calibration fossil used by Arroyave et al [18] to infer a time-scaled phylogeny of citharinoid fishes.…”

Section: Bayesian Co-estimation Of Phylogeny and Divergence Timesmentioning

confidence: 78%

“…These inferences were based on a molecular clock calibrated using~7.5 Ma Distichodus fossilized dentition [34], which at the time was the oldest known fossil assignable to the genus. The recent discovery of a considerably older (18-19 Ma) Distichodus fossil [35], however, prompted our reexamination of the timescale of Distichodus diversification in the context of a larger dataset, both in terms of molecular markers (8 vs. 7 loci) and taxon sampling (20 vs. 16 spp.). This older fossil, however, presented us with the challenge of accurately assigning it to a node for the purpose of calibrating the molecular clock and estimating absolute times of divergence in the phylogeny of Distichodus.…”

Section: A Spatiotemporal Framework For Distichodus Diversificationmentioning

confidence: 99%

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Pattern and timing of diversification in the African freshwater fish genus Distichodus (Characiformes: Distichodontidae)

Arroyave

Denton

2020

BMC Evol Biol

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Background: Distichodus is a clade of tropical freshwater fishes currently comprising 25 named species distributed continent-wide throughout the Nilo-Sudan and most Sub-Saharan drainages. This study investigates the phylogenetic relationships, timing of diversification, and biogeographic history of the genus from a taxonomically comprehensive mutilocus dataset analyzed using Maximum Likelihood and Bayesian methods of phylogenetic inference, coalescence-based species-tree estimation, divergence time estimation, and inference of geographic range evolution. Results: Analyses of comparative DNA sequence data in a phylogenetic context reveal the existence of two major clades of similar species-level diversity and provide support for the monophyletic status of most sampled species. Biogeographic reconstruction on a time-scaled phylogeny suggest that the origins of the genus date back to the late Oligocene and that current geographic distributions are the result of a Congo Basin origin followed by dispersal and range expansion into adjacent ichthyofaunal provinces at different times during the evolutionary history of the group. Conclusions: We present the most comprehensive phylogenetic, chronological, and biogeographic treatment yet conducted for the genus. The few instances of species paraphyly (D. teugelsi, D. fasciolatus) revealed by the resulting phylogenies are likely a consequence of post-divergence introgressive hybridization and/or incomplete lineage sorting due to recent speciation. Historical biogeographic findings are both in agreement and conflict with previous studies of other continent-wide African freshwater fish genera, suggesting a complex scenario for the assemblage of Africa's continental ichthyofaunal communities.

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Section: Bayesian Co-estimation Of Phylogeny and Divergence Timesmentioning

confidence: 78%

Section: A Spatiotemporal Framework For Distichodus Diversificationmentioning

confidence: 99%

Pattern and timing of diversification in the African freshwater fish genus Distichodus (Characiformes: Distichodontidae)

Arroyave

Denton

2020

BMC Evol Biol

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“…In contrast, † G . mayumbensis has been reported in the scientific literature from a few Miocene localities of Africa, Asia, North America and South America [ 42 , 61 , 83 , 149 , 150 ]. The known fossil record of † G .…”

Section: Discussionmentioning

confidence: 99%

Neogene sharks and rays from the Brazilian ‘Blue Amazon’

et al. 2017

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The lower Miocene Pirabas Formation in the North of Brazil was deposited under influence of the proto-Amazon River and is characterized by large changes in the ecological niches from the early Miocene onwards. To evaluate these ecological changes, the elasmobranch fauna of the fully marine, carbonate-rich beds was investigated. A diverse fauna with 24 taxa of sharks and rays was identified with the dominant groups being carcharhiniforms and myliobatiforms. This faunal composition is similar to other early Miocene assemblages from the proto-Carribbean bioprovince. However, the Pirabas Formation has unique features compared to the other localities; being the only Neogene fossil fish assemblage described from the Atlantic coast of Tropical Americas. Phosphate oxygen isotope composition of elasmobranch teeth served as proxies for paleotemperatures and paleoecology. The data are compatible with a predominantly tropical marine setting with recognized inshore and offshore habitats with some probable depth preferences (e.g., Aetomylaeus groups). Paleohabitat of taxa particularly found in the Neogene of the Americas ( †Carcharhinus ackermannii, †Aetomylaeus cubensis) are estimated to have been principally coastal and shallow waters. Larger variation among the few analyzed modern selachians reflects a larger range for the isotopic composition of recent seawater compared to the early Miocene. This probably links to an increased influence of the Amazon River in the coastal regions during the Holocene.PLOS ONE | https://doi.org/10.1371/journal.pone

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“…The molecular clock was calibrated based on early Miocene (ca. 18 Ma) fossilized dentition attributable to Distichodus recovered from deposits of the Maradah Formation in Jabal Zaltan, Libya, by far the oldest fossil unambiguously assignable to the genus [32]. In fact, this fossil pushes back the first known appearance of Distichodus in the fossil record by 10 Ma with respect to the Distichodus calibration fossil used by Arroyave et al [15] to infer a time-scaled phylogeny of citharinoid fishes.…”

Section: Bayesian Co-estimation Of Phylogeny and Divergence Timesmentioning

confidence: 78%

“…These inferences were based on a molecular clock calibrated using ~7.5 Ma Distichodus fossilized dentition [31], which at the time was the oldest known fossil assignable to the genus. The recent discovery of a considerably older (18)(19) Ma) Distichodus fossil [32], however, prompted our reexamination of the timescale of Distichodus diversification in the context of a larger dataset, both in terms of molecular markers (8 vs. 7 loci) and taxon sampling (20 vs. 16 spp.). This older fossil, however, presented us with the challenge of accurately assigning it to a node for the purpose of calibrating the molecular clock and estimating absolute times of divergence in the phylogeny of…”

Section: A Spatiotemporal Framework For Distichodus Diversificationmentioning

confidence: 99%

Pattern and Timing of Diversification in the African Freshwater Fish Genus Distichodus (Characiformes: Distichodontidae)

Arroyave

Denton

2020

Preprint

View full text Add to dashboard Cite

Background : Distichodus is a clade of tropical freshwater fishes currently comprising 25 named species distributed continent-wide throughout the Nilo-Sudan and most Sub-Saharan drainages. This study investigates the phylogenetic relationships, timing of diversification, and biogeographic history of the genus from a taxonomically comprehensive mutilocus dataset analyzed using Maximum Likelihood and Bayesian methods of phylogenetic inference, coalescence-based species-tree estimation, divergence time estimation, and inference of geographic range evolution. Results: Analyses of comparative DNA sequence data in a phylogenetic context reveal the existence of two major clades of similar species-level diversity and provide support for the monophyletic status of most sampled species. Biogeographic reconstruction on a time-scaled phylogeny suggest that the origins of the genus date back to the late Oligocene and that current geographic distributions are the result of a Congo Basin origin followed by dispersal and range expansion into adjacent ichthyofaunal provinces at different times during the evolutionary history of the group. Conclusions : We present the most comprehensive phylogenetic, chronological, and biogeographic treatment yet conducted for the genus. The few instances of species paraphyly ( D. teugelsi, D. fasciolatus ) revealed by the resulting phylogenies are likely a consequence of post-divergence introgressive hybridization and/or incomplete lineage sorting due to recent speciation. Historical biogeographic findings are both in agreement and conflict with previous studies of other continent-wide African freshwater fish genera, suggesting a complex scenario for the assemblage of Africa’s continental ichthyofaunal communities.

show abstract

A fish assemblage from an early Miocene horizon from Jabal Zaltan, Libya

Cited by 32 publications

References 41 publications

Pattern and timing of diversification in the African freshwater fish genus Distichodus (Characiformes: Distichodontidae)

Pattern and timing of diversification in the African freshwater fish genus Distichodus (Characiformes: Distichodontidae)

Neogene sharks and rays from the Brazilian ‘Blue Amazon’

Pattern and Timing of Diversification in the African Freshwater Fish Genus Distichodus (Characiformes: Distichodontidae)

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