Giant gar from directly above the Cretaceous–Palaeogene boundary suggests healthy freshwater ecosystems existed within thousands of years of the asteroid impact

Brownstein, Chase Doran; Lyson, Tyler R.

doi:10.1098/rsbl.2022.0118

Cited by 6 publications

(2 citation statements)

References 76 publications

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“…While this caused one of the five largest mass extinctions, leading to the disappearance of ~ 70% of species including the non-avian dinosaurs [ 54 , 55 ], several taxa were less affected and were able to diversify and thrive, including mammals, birds, worm lizards, spiny-rayed fishes and freshwater species [ 56 – 61 ]. In particular, freshwater environments acted as a refuge for biota due to their higher thermal inertia, and because the detritus-based food web of riverine systems was less affected than terrestrial and marine primary production [ 56 , 60 , 62 – 64 ]. This would allow them to occupy ecological roles left by extinct forms and thus diversify [ 57 , 58 ].…”

Section: Discussionmentioning

confidence: 99%

Genomes of the Orestias pupfish from the Andean Altiplano shed light on their evolutionary history and phylogenetic relationships within Cyprinodontiformes

Morales,

Gajardo,

Valdivieso

et al. 2024

BMC Genomics

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Background To unravel the evolutionary history of a complex group, a comprehensive reconstruction of its phylogenetic relationships is crucial. This requires meticulous taxon sampling and careful consideration of multiple characters to ensure a complete and accurate reconstruction. The phylogenetic position of the Orestias genus has been estimated partly on unavailable or incomplete information. As a consequence, it was assigned to the family Cyprindontidae, relating this Andean fish to other geographically distant genera distributed in the Mediterranean, Middle East and North and Central America. In this study, using complete genome sequencing, we aim to clarify the phylogenetic position of Orestias within the Cyprinodontiformes order. Results We sequenced the genome of three Orestias species from the Andean Altiplano. Our analysis revealed that the small genome size in this genus (~ 0.7 Gb) was caused by a contraction in transposable element (TE) content, particularly in DNA elements and short interspersed nuclear elements (SINEs). Using predicted gene sequences, we generated a phylogenetic tree of Cyprinodontiformes using 902 orthologs extracted from all 32 available genomes as well as three outgroup species. We complemented this analysis with a phylogenetic reconstruction and time calibration considering 12 molecular markers (eight nuclear and four mitochondrial genes) and a stratified taxon sampling to consider 198 species of nearly all families and genera of this order. Overall, our results show that phylogenetic closeness is directly related to geographical distance. Importantly, we found that Orestias is not part of the Cyprinodontidae family, and that it is more closely related to the South American fish fauna, being the Fluviphylacidae the closest sister group. Conclusions The evolutionary history of the Orestias genus is linked to the South American ichthyofauna and it should no longer be considered a member of the Cyprinodontidae family. Instead, we submit that Orestias belongs to the Orestiidae family, as suggested by Freyhof et al. (2017), and that it is the sister group of the Fluviphylacidae family, distributed in the Amazonian and Orinoco basins. These two groups likely diverged during the Late Eocene concomitant with hydrogeological changes in the South American landscape.

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Section: Discussionmentioning

confidence: 99%

Genomes of the Orestias pupfish from the Andean Altiplano shed light on their evolutionary history and phylogenetic relationships within Cyprinodontiformes

Morales,

Gajardo,

Valdivieso

et al. 2024

BMC Genomics

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“…Placements of the fossil holostean taxa in the phylogeny are on the basis of inferences from morphological analyses (Olsen 1984;Schultze and Wiley 1984;Lambers 1995;Gardiner et al 1996;Wenz 1999;Xu and Gao 2011;López-Arbarello 2012;Xu et al , 2018Cavin et al 2013;López-Arbarello et al 2014Xu. Zhao, et al 2014;Poyato-Ariza 2015;Xu and Shen 2015;Brito et al 2017;Sun et al 2017;Ebert 2018;Latimer and Giles 2018;López-Arbarello and Sferco 2018;Ren and Xu 2021;Brownstein 2022;Brownstein and Lyson 2022;.…”

Section: Acipenseridae Polyodontidae †Paleopsephurus †Priscosturion †...mentioning

confidence: 99%

Phylogenetic Classification of Living and Fossil Ray-Finned Fishes (Actinopterygii)

Near,

Thacker

2024

Bulletin of the Peabody Museum of Natural History

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Classification of the tremendous diversity of ray-finned fishes (Actinopterygii) began with the designation of taxonomic groups on the basis of morphological similarity. Starting in the late 1960s morphological phylogenetics became the basis for the classification of Actinopterygii but failed to resolve many relationships, particularly among lineages within the hyperdiverse Percomorpha. The introduction of molecular phylogenetics led to a dramatic reconfiguration of actinopterygian phylogeny. Refined phylogenetic resolution afforded by molecular studies revealed an uneven diversity among actinopterygian lineages, resulting in a proliferation of redundant group names in Linnean-ranked classifications. Here we provide an unranked phylogenetic classification for actinopterygian fishes based on a summary phylogeny of 830 lineages of rayfinned fishes that includes all currently recognized actinopterygian taxonomic families and 287 fossil taxa. We provide phylogenetic definitions for 90 clade names and review seven previously defined names. For each of the 97 clade names, we review the etymology of the clade name, clade species diversity and constituent lineages, clade diagnostic morphological apomorphies, review synonyms, and provide a discussion of the clade's nomenclatural and systematic history. The new classification is free of redundant group names and includes only one new name among the 97 clade names we review and describe, yielding a comprehensive classification that is based explicitly on the phylogeny of ray-finned fishes that has emerged in the 21st century and rests on the foundation of the previous 200 years of research on the systematics of ray-finned fishes.

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A new fully marine, short-snouted lepisosteid gar from the Upper Cretaceous (Turonian) of North Africa

Cooper

Gunn

Brito

et al. 2023

Cretaceous Research

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Giant gar from directly above the Cretaceous–Palaeogene boundary suggests healthy freshwater ecosystems existed within thousands of years of the asteroid impact

Cited by 6 publications

References 76 publications

Genomes of the Orestias pupfish from the Andean Altiplano shed light on their evolutionary history and phylogenetic relationships within Cyprinodontiformes

Genomes of the Orestias pupfish from the Andean Altiplano shed light on their evolutionary history and phylogenetic relationships within Cyprinodontiformes

Phylogenetic Classification of Living and Fossil Ray-Finned Fishes (Actinopterygii)

A new fully marine, short-snouted lepisosteid gar from the Upper Cretaceous (Turonian) of North Africa

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