An Alien Monogenean, Ligictaluridus pricei (Platyhelminthes: Ancyrocephalidae), Parasitic on the Channel Catfish Ictalurus punctatus (Actinopterygii: Siluriformes: Ictaluridae) in Japan

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The alien monogenean Ligictaluridus pricei (Mueller, 1936), parasitic on the gills of the channel catfish Ictalurus punctatus (Rafinesque, 1818), is described from Lake Kasumigaura, Ibaraki Prefecture, central Honshu, Japan, as a new country record. This monogenean is native to North America and is known as an introduced parasite in Eurasia. As it is not strictly host-specific to ictalurids, native freshwater fishes in Japan have a risk of infection by this monogenean species.