Page "Cretaceous–Paleogene extinction event" Paragraph 33

The two living non-archosaurian reptile taxa, testudines ( turtles ) and lepidosaurs ( snakes, lizards, and amphisbaenians ( worm lizards ), along with choristoderes ( semi-aquatic archosauromorphs that died out in the early Miocene ), survived through the K – T boundary.

Over 80 % of Cretaceous turtle species passed through the K – T boundary.

Additionally, all six turtle families in existence at the end of the Cretaceous survived into the Tertiary and are represented by current species.

Living lepidosaurs include Rhynchocephalia ( tuataras ) and Squamata.

The Rhynchocephalia were a widespread and relatively successful group of lepidosaurs in the early Mesozoic, but began to decline by the mid-Cretaceous.

They are represented today by a single genus located exclusively in New Zealand.