Saurischian dinosaurs have have the hips of modern dinosaurs/lizards. Some lizards that have reptilian ansesters such dinosaurs and other lizards. How are small lizards still alive today? Because they were small enough they could fit underground.Thorugh the exinction.
The t rex had a huge skull and long curved teeth and the hips of a lizard.
The oviraptor alaso had the hips of a lizard even though it had a beak like a bird.It eats mea . Its beak could crush shellfish or lizards. It lived in the late creteaceous peroid.