Evolution of terrestrial anatomy revealed by a derived stem tetrapod

T1Covered by 1 source · first reported by Nature / Science / Nature Biotechnology at 30 Sept, 00:00 UTC

Nature, Published online: 30 September 2026; doi:10.1038/s41586-026-11090-6 New anatomical evidence reclassifies Westlothiana as an aquatic stem tetrapod, showing that terrestrial limb adaptations evolved mosaically in transitional amphibious environments before crown tetrapods emerged.