Porocephalida

Porocephalida is an order of tongue worms. Some species in this order, such as Armillifer grandis, have been found in vipers, with some found in vipers from bushmeat markets.

Superfamilies and families
There are four families recognised in the order Porocephalida.
 * Linguatuloidea
 * Linguatulidae
 * Subtriquetridae
 * Porocephaloidea
 * Porocephalidae
 * Sebekidae