Unique pelvic fin in a tetrapod-like fossil fish, and the evolution of limb patterning

@article{Jeffery2018UniquePF,
  title={Unique pelvic fin in a tetrapod-like fossil fish, and the evolution of limb patterning},
  author={J. Jeffery and G. W. Storrs and Timothy Holland and C. Tabin and P. Ahlberg},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2018},
  volume={115},
  pages={12005 - 12010}
}
Significance The fossil fish Rhizodus hibberti, a member of the tetrapod stem group, shows a unique skeletal pattern in the pelvic fin. Rather than the highly conserved one-to-two pattern of a femur, tibia, and fibula (seen in all known tetrapods, including the extinct, fishlike members of the group), the fin of Rhizodus comprises a femur articulating distally with three bones, each with a distinct morphology. This reveals an early stage in the evolution of limb development, in which the… Expand
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