Jaws and teeth of the earliest bony fishes

@article{Botella2007JawsAT,
  title={Jaws and teeth of the earliest bony fishes},
  author={H. Botella and H. Blom and Markus Dorka and P. Ahlberg and P. Janvier},
  journal={Nature},
  year={2007},
  volume={448},
  pages={583-586}
}
Extant jawed vertebrates, or gnathostomes, fall into two major monophyletic groups, namely chondrichthyans (cartilaginous fishes) and osteichthyans (bony fishes and tetrapods). Fossil representatives of the osteichthyan crown group are known from the latest Silurian period, 418 million years (Myr) ago, to the present. By contrast, stem chondrichthyans and stem osteichthyans are still largely unknown. Two extinct Palaeozoic groups, the acanthodians and placoderms, may fall into these stem groups… Expand
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The discovery of an exceptionally preserved primitive fish from the Ludlow of Yunnan, China, that represents the oldest near-complete gnathostome (jawed vertebrate) offers insights into the origin and early divergence of osteichthyans, and indicates that the minimum date for the actinopterygian–sarcoperygian split was no later than 419 million years ago. Expand
Scales and Tooth Whorls of Ancient Fishes Challenge Distinction between External and Oral ‘Teeth’
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A new Silurian fish close to the common ancestor of modern gnathostomes
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  • Medicine
  • Current Biology
  • 2021
TLDR
A new Silurian maxillate placoderm, Bianchengichthys micros, from the Ludlow of Chongqing, with a near-complete dermatoskeleton preserved in articulation is reported, corroborating the paleogeographic proximity between the Indochina and South China blocks during the Middle Paleozoic. Expand
Testing models of dental development in the earliest bony vertebrates, Andreolepis and Lophosteus
TLDR
These fossil remains have no bearing on the nature of the dentition in osteichthyans and, indeed, the results raise questions concerning the homologies of these bones and the phylogenetic classification of Andreolepis and Lophosteus. Expand
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