Polcyn and Bell diagnose " Dallasaurus " as follows : " Small, plesiopedal mosasauroid possessing the following autapomorphies : posterior fossa excavated immediately below the ventral rim of the cotyle of at least one middle cervical vertebra; hypapophysis anteroventral edge terminating in short projections of irregular length; postglenoid process capped by bony epiphysis bearing a calcified cartilage apex ."
मोबाइल