Claim: Two species of the extinct Coniasaurus have only been described from incomplete specimens and chalk deposits; it was a marine squamate of the Late Cretaceous period.
Evidence: Coniasaurus is an extinct genus of Late Cretaceous marine squamates that range in age from Cenomanian to Santonian. Squamata (/skwæˈmeɪtə/, Latin squamatus ("scaly, having scales")) is the largest order of reptiles, comprising lizards, snakes and amphisbaenians (worm lizards), which are collectively known as squamates or scaled reptiles. Cretaceous Upper/
Late Lower/
Early Jurassic Paleogene