The authors of the latest study determined that the bone represents a pterosaur from the family called Azhdarchidae. The incomplete vertebra bone, described in a journal article published in The Magazine of the Argentine Museum of Natural Sciences, was discovered in rocks from a geological formation that dates back to between 100 million and 90 million years ago. Researchers found a single neck vertebra bone on the banks of the Ezequiel Ramos Mexía Reservoir-a huge man-made lake located along Rio Negro's border with the neighboring province of Neuquén. More Gabriel Lio/Laboratorio de Anatomía Comparada y Evolución de los Vertebrados This prehistoric reptile belongs to a group known as Azhdarchidae that includes the largest flying animals of all time. An illustration of the pterosaur represented by a single vertebra bone found on the banks of the Ezequiel Ramos Mexía Reservoir in Rio Negro Province, Argentina. This prehistoric reptile belongs to a group known as.
