Set of scales near the tip of the snout of a reptile
Nomenclature of scales (top view of head)
The prefrontal scales on snakes and other reptiles are the scales adjacent and anterior to the frontal, towards the tip of the snout, which are also in contact with the internasals.
Wareham DC (2005). Elsevier's Dictionary of Herpetological and Related Terminology. Amsterdam: Elsevier. 240 pp. ISBNÂ 978-0444518637. ("PREFRONTAL", p. 160).
