Redescription of <i>Argulus mongolianus</i> (Crustacea: Branchiura: Argulidae), an Ectoparasite of Freshwater Fishes in East Asia, with Its First Record from Japan

Both adult females and males of Argulus mongolianus Tokioka, 1939 were collected from the buccal cavity wall body surface freshwater fishes in Lake Izunuma Uchinuma, Miyagi Prefecture, northen Honshu, Japan. The original description species was insufficient, based on a single female Inner Mongolia, China, no further has been made to date. Thus, this paper redescribes A. newly-collected specimens, including first male. This represents record infected largemouth bass, Micropterus salmoides (Lacepède, 1802), common carp, Cyprinus carpio Linnaeus, 1758, Japanese white crucian Carassius cuvieri Temminck Schlegel, 1846, silver sp. three other than carp are new host records for mongolianus. parasite most probably introduced with an unspecified fish China into