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 ...
Researchers report a unique skeletal structure in the fins of a tetrapod-like fossil fish. Living four-limbed vertebrates, or tetrapods, exhibit a common skeletal pattern in the proximal part of their ...
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