The discovery should help scientists better understand the evolution of fish to advanced animals that walk on land.
The 365-million-year-old fossil skull, shoulders and part of the pelvis of the water-dweller, Ventastega curonica.
The fossil was found in Latvia, according to a study published in the journal Nature.
Ventastega is likely an evolutionary dead-end, because scientists don't think that four-legged creatures are directly evolved from it. But the finding sheds new details on the evolutionary transition from fish to tetrapods, animals with four limbs.
