ArticleNature2017
A symmoriiform chondrichthyan braincase and the origin of chimaeroid fishes.
Article in Nature, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.
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30 citing papers in PubMed, 76 citations in OpenAlex.
- Articulated specimens provide new insights into the iconic Mesozoic shark genusJournal of systematic palaeontology · 2025Article
- Teeth outside the jaw: Evolution and development of the toothed head clasper in chimaeras.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- A 3D braincase of the early jawed vertebrateNational science review · 2025Article
- Three-dimensional fossils of a Cretaceous collared carpet shark (Parascylliidae, Orectolobiformes) shed light on skeletal evolution in galeomorphs.Royal Society open science · 2025Article
- The Palaeozoic assembly of the holocephalan body plan far preceded post-Cretaceous radiations into the ocean depths.Proceedings. Biological sciences · 2024Article
- Evolutionary trends in the elasmobranch neurocranium.Scientific reports · 2024Article
- Bony-fish-like scales in a Silurian maxillate placoderm.Nature communications · 2023Article
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- Systematics and Phylogenetic Interrelationships of the Enigmatic Late Jurassic SharkDiversity · 2023Article
- Evidence for high-performance suction feeding in the Pennsylvanian stem-group holocephalanProceedings of the National Academy of Sciences of the United States of America · 2023Article
- Broad snouted cladoselachian with sensory specialization at the base of modern chondrichthyans.Swiss journal of palaeontology · 2023Article
- The Development of theJournal of developmental biology · 2022Article
- Sixth sense in the deep-sea: the electrosensory system in ghost shark Chimaera monstrosa.Scientific reports · 2022Article
- The Phylogeny of Rays and Skates (Chondrichthyes: Elasmobranchii) Based on Morphological Characters Revisited.Diversity · 2022Article
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- The morphology and evolution of chondrichthyan cranial muscles: A digital dissection of the elephantfish Callorhinchus milii and the catshark Scyliorhinus canicula.Journal of anatomy · 2021Article
- Mineralized Cartilage and Bone-Like Tissues in Chondrichthyans Offer Potential Insights Into the Evolution and Development of Mineralized Tissues in the Vertebrate Endoskeleton.Frontiers in genetics · 2021Review
- A symmoriiform from the Late Devonian of Morocco demonstrates a derived jaw function in ancient chondrichthyans.Communications biology · 2020Article
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Chimaeroid fishes (Holocephali) are one of the four principal divisions of modern gnathostomes (jawed vertebrates). Despite only 47 described living species, chimaeroids are the focus of resurgent interest as potential archives of genomic data and for the unique perspective they provide on chondrichthyan and gnathostome ancestral conditions. Chimaeroids are also noteworthy for their highly derived body plan. However, like other living groups with distinctive anatomies, fossils have been of limited use in unravelling their evolutionary origin, as the earliest recognized examples already exhibit many of the specializations present in modern forms. Here we report the results of a computed tomography analysis of Dwykaselachus, an enigmatic chondrichthyan braincase from the ~280 million year old Karoo sediments of South Africa. Externally, the braincase is that of a symmoriid shark and is by far the most complete uncrushed example yet discovered. Internally, the morphology exhibits otherwise characteristically chimaeroid specializations, including the otic labyrinth arrangement and the brain space configuration relative to exceptionally large orbits. These results have important implications for our view of modern chondrichthyan origins, add robust structure to the phylogeny of early crown group gnathostomes, reveal preconditions that suggest an initial morpho-functional basis for the derived chimaeroid cranium, and shed new light on the chondrichthyan response to the extinction at the end of the Devonian period.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.