Henophidia


Henophidia is a former superfamily of the suborder Serpentes that contains boas, pythons and numerous other less-well-known snakes.
Snakes once considered to belong to superfamily Henophidia include two families now considered Amerophidia, three families now considered Uropeltoidea, three families now considered Pythonoidea, at least one family now considered Booidea, and Bolyeriidae – Round Island splitjaw snakes.
Because these snakes do not form a monophyletic group they can no longer be formally referred to using a single name. In modern usage, "Henophidia" is often placed in quotes, because it can be convenient to refer to all lineages that used to be considered Henophidia. Another way of thinking about it is that "henophidian" snakes are all snakes that are not Scolecophidia or Caenophidia. "Henophidian" snakes are sometimes said to be more "basal" or "primitive" than those belonging to the Caenophidia, but this does not mean that they are inferior or that they have evolved less, rather that we think they share more traits with their common ancestor in comparison to the Caenophidia.

Etymology

Henophidia comes from the Greek heno- meaning one or former and ophidia meaning serpent, so former/older snakes.

Former families