The charecteristic of class Reptilia are
Body covered with moist skin devoid of scales , ear is represented by tympanum
Fresh water animals with bony endolskeleton , air bladder to regulate buoyancy
Marine animals with cartilaginous endoskeleton , body covered with placoid scales
Body covered with dry and cornified skin , scales over the body are epidermal , do not have extrernal ear
As we have learned
Body of reptilia -
Body is covered by dry and cornified skin, epidermal scales or scutes. Tympanum is present and have external ear opening.
-
External ear , pinnae is absent