1) Class 2) Subclass lepidosauria 
The Lepidosauria (from Greek meaning scaled lizards) are reptiles with overlapping scales. This subclass includes Squamata and Rhynchocephalia. It is a monophyletic group and therefore contains all descendents of a common ancestor. Squamata includes snakes, lizards, and amphisbaenia. Rhynchocephalia was a widespread and diverse group 220-100 milli...
• (n. pl.) A division of reptiles, including the serpents and lizards; the Plagiotremata.
Lep`i·do·sau'ri·a (-do*sa'rĭ*ȧ) noun plural [ New Latin , from Greek 
[n] - diapsid reptiles: lizards
subclass Lepidosauria noun diapsid reptiles: lizards; snakes; tuataras