Article: Lizard egg shells from the Lower Cretaceous of Cuenca Province, Spain

The Lower Cretaceous vertebrate-bearing coaly marls and limestones of Una (Province of Cuenca, Spain) have yielded fragmentary reptilian egg shells. The shell is of gekkonid microstructure type, and thus they can be confidently assigned to the lizards. These fragments represent the oldest known gekko-like egg shells.