Ancient fish had synovial joints, challenging the idea that flexible skeletons evolved on land. Fossils and modern fish show similarities.

Recent research reveals that synovial joints originated in early jawed fish, reshaping our understanding of vertebrate skeletal evolution and movement.

Unlike nearly all fossil fish of that age, Palaeospondylus was ... Palaeospondylus was related either to chondrichthyans (sharks), or tetrapods (the land vertebrates). Or maybe it was a stem ...

But vertebrate-style hearing only evolved once in a fish ancestor, which was passed on to all tetrapods, or animals with four limbs like mammals, birds, reptiles, and amphibians. We know that ...

Most of the work on motor neuron death in tetrapods was carried out on limb innervating motor ... In the future, with more advanced imaging techniques, the sensor fish in the present study may provide ...

curid=108093940 A tetrapod is a four-limbed vertebrate, including animals like amphibians, reptiles, birds, and mammals. These creatures first evolved from fish, adapting to life on land. Gaiasia ...

They belong to a group of “lobe-finned” fish. This means their fins have a bone structure that’s surprisingly similar to human arms. In fact, they’re more closely related to tetrapods—four-limbed ...

The study finds the prehistoric hunter had a much longer body -- closer ... Adaptability of Some Coral Reef Fish to Rising Temperatures Mar. 6, 2025 — Researchers have found that reef fish from ...