ArticleNature ecology & evolution2020
Endochondral bone in an Early Devonian 'placoderm' from Mongolia.
Article in Nature ecology & evolution, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.
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23 citing papers in PubMed.
- Synchrotron radiation micro-computed tomography of the small-spotted catshark embryonic development (Chondrichthyes: Scyliorhinus canicula).GigaScience · 2026Article
- Cellular and genetic mechanisms that shape the development and evolution of tail vertebral proportion in mice and jerboas.Nature communications · 2025Article
- Evolutionary trends in the emergence of skeletal cell types.Evolution letters · 2025Article
- A 3D braincase of the early jawed vertebrateNational science review · 2025Article
- Synovial joints were present in the common ancestor of jawed fish but lacking in jawless fish.PLoS biology · 2025Article
- The evolution of tenascins.BMC ecology and evolution · 2024Article
- Bony-fish-like scales in a Silurian maxillate placoderm.Nature communications · 2023Article
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- A well-preserved 'placoderm' (stem-group Gnathostomata) upper jaw from the Early Devonian of Mongolia clarifies jaw evolution.Royal Society open science · 2023Article
- The oldest gnathostome teeth.Nature · 2022Article
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- Parallel Evolution of Ameloblastic scpp Genes in Bony and Cartilaginous Vertebrates.Molecular biology and evolution · 2022Article
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- Bone metabolism and evolutionary origin of osteocytes: Novel application of FIB-SEM tomography.Science advances · 2021Article
- Evolution of Matrix Gla and Bone Gla Protein Genes in Jawed Vertebrates.Frontiers in genetics · 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
- Divergent Expression ofFrontiers in genetics · 2021Article
- A large Middle Devonian eubrachythoracid 'placoderm' (Arthrodira) jaw from northern Gondwana.Swiss journal of palaeontology · 2021Article
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9 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Endochondral bone is the main internal skeletal tissue of nearly all osteichthyans-the group comprising more than 60,000 living species of bony fishes and tetrapods. Chondrichthyans (sharks and their kin) are the living sister group of osteichthyans and have primarily cartilaginous endoskeletons, long considered the ancestral condition for all jawed vertebrates (gnathostomes). The absence of bone in modern jawless fishes and the absence of endochondral ossification in early fossil gnathostomes appear to lend support to this conclusion. Here we report the discovery of extensive endochondral bone in Minjinia turgenensis, a new genus and species of 'placoderm'-like fish from the Early Devonian (Pragian) of western Mongolia described using X-ray computed microtomography. The fossil consists of a partial skull roof and braincase with anatomical details providing strong evidence of placement in the gnathostome stem group. However, its endochondral space is filled with an extensive network of fine trabeculae resembling the endochondral bone of osteichthyans. Phylogenetic analyses place this new taxon as a proximate sister group of the gnathostome crown. These results provide direct support for theories of generalized bone loss in chondrichthyans. Furthermore, they revive theories of a phylogenetically deeper origin of endochondral bone and its absence in chondrichthyans as a secondary condition.
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