Tylosaurinae

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Tylosaurinae is a subfamily of mosasaurs, a diverse group of Late Cretaceous marine lizards. Russell (1967, pp. 170) defined the Tylosaurinae as follows: "Large rostrum present anterior to premaxillary teeth. Twelve or more teeth in dentary and maxilla. Cranial nerves X, XI, and XII leave lateral wall of opisthotic through a single foramen. No canal in basioccipital or basispehnoid for basilar artery. Suprastapedial process of quadrate moderately large, distally pointed.