Family ICHTHYOPHTHIRIIDAE Kent, 1881

Syns.

Cryptocaryonidae, Ichthyophthiridae

Oral ciliature possibly less complex than in ophryoglenids, but similar in many other characteristics; encysted tomont (away from host) can be of great size, producing hundreds (up to 2,000) tomites by palintomic fission; trophonts invade epithelial tissues of marine or fresh-water fishes, causing white spot disease; few species, but widespread distribution.

Cryptocaryon Brown, 1951. Single (marine) species.
Ichthyophthirioides Roque & de Puytorac, 1966 (syn. of Ichthyophthirius?). Single species.
Ichthyophthirius Fouquet, 1876. Single (possibly more?) species.