Description: The Osteolepiform fish are thought to be the ancestors of the Tetrapoda due to their paired lobed fins being homologous to the limbs, and the choanae (posterior nostril). Osteolepis possessed two rounded dorsal fins placed posteriorly, and a heterocercal tail with a larger lower lobe. They possessedthick rhombic scales covered with a cosmine layer, resulting in the shine seen in this fossil. This ancient group of fish is thought to have given rise to the Tetrapod body plan. The fossil has a few additional skull fragments from another specimen.