Ichthyosaurs became extinct whereas sauropods, as a whole, did not; in fact, some species, like Titanosaurus, lived until the K-T extinction.
Ichthyosaurus punah, sedangkan sauropoda tidak mati secara keseluruhan di Periode Jura; pada kenyataannya, beberapa spesies, seperti Titanosaurus, hidup sampai kepunahan KT.