List of snakes lists snakes, part of the squamata order of reptiles, by family, subfamily and genus, mostly according to the continuing work of Dr. Roy W. McDiarmid, available through ITIS. The one exception is the family Colubridae because ITIS information for it is currently incomplete. In this case, taxonomic data from the New Reptile Database was used instead, combined with some information for authorities, years and common names from ITIS. Approximate world distribution of snakes.