Obruchevichthys is an extinct genus of stem-tetrapod from Latvia during the Late Devonian. When the jawbone, the only known fossil of this creature, was uncovered in Latvia, it was mistaken as a lobe-fin fish. However, when it was analyzed, it proved to hold many similarities to Elginerpeton, from Scotland. It was then declared belonging to the earliest group of tetrapods.

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Further reading

• Gaining Ground: The Origin and Early Evolution of Tetrapods by Jennifer A. Clack

• Origins of the Higher Groups of Tetrapods: Controversy and Consensus by Hans-Peter Schultze and Linda Trueb

• Air-Breathing Fishes: Evolution, Diversity, and Adaptation by Jeffrey B. Graham