Sustained fast rates of evolution explain how tetrapods evolved from fish. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2021 / 08 / 210823125839.htm ...

This “fish-to-tetrapod” transition took place somewhere between the Middle and Late Devonian (~400-360 million years ago) and represents the onset of a major environmental shift, when ...

Early tetrapods, the first four-limbed vertebrates, retained many fish-like traits but had jointed legs and digits. Their bones gradually adapted for walking and supporting weight outside of water.

On Tiktaalik and other tetrapod-like fish, the humerus had knobs and ridges where powerful walking muscles were anchored. But Qikiqtania had a smooth humerus that offered little support for muscles.

The study expands paleontologists' understanding of this period in evolutionary history by showing that animals weren't just evolving from water-based fish to land-based tetrapods.

M. Coates, ‘The Devonian tetrapod Acanthostega gunnari Jarvik: postcranial anatomy, basal tetrapod interrelationships and patterns of skeletal evolution’ (Transactions of the Royal Society of ...

Tetrapods had more complex connections between the bones inside their skull than fish, and that this impeded their evolution. By JERUSALEM POST STAFF SEPTEMBER 12, 2022 03:17 Early tetrapod.

Tetrapod Limbs: If you want to see concrete evidence of evolution, look no further than your hand or your foot. Five fingers, five toes. There's nothing magical about the number, yet five digits ...

More information: Earliest amniote tracks recalibrate the timeline of tetrapod evolution, Nature (2025). DOI: 10.1038/s41586-025-08884-5 Journal information: Nature ...

Tetrapod Limbs: If you want to see concrete evidence of evolution, look no further than your hand or your foot. Five fingers, five toes. There's nothing magical about the number, yet five digits ...