DIGENETIC TREMATODES 19 



Family BUCEPHALIDAE 



Rbipidocotyle elongatum McFarlane, 1936 



Hosts: Ophiodon elongatus B.C. McFarlane, 1936 



Ophiodon elongatus Wash. Ching, 1960b 



Biology : The life cycle for this form is not known, but other species in the 

 genus have been shown to have distinctive cercariae which develop in 

 mussels and encyst in the tissues of small fish before reaching the definitive 

 host (Kniskern, 1952). 



Bucephalopsis ozakii (Ozaki, 1928) Nagaty, 1937 



Synonyms: Bucephalopsis ovatus Ozaki, 1928 (Preoccupied by B. ovattis Linton, 

 1900) 



Hosts: Salvelinus niahiia B.C. Bangham & Adams, 1954 



Platyichthys stellatus Ore. ^Lincoln Co. 



Leptocottus armatus Ore. ^Lincoln Co. 



This form has also been described from Korea (Ozaki, 1928). 



Biologj' : The life history of this form is unknown, but the closely related 

 Bucephalopsis haemiamis has been shown to develop in the oyster, encyst 

 in Menidia, and develop to maturity in various fishes (Palombi, 1934). 



Prosorhynchus squamatus Odhner, 1905 



Synonyms : Bucephalus crux Levinsen, 1881 



Prosorhynchus grandis Lebour, 1908 

 Prosorhynchus triglac Nicoll, 1914 



Host: Enophrys bison Ore. *Lincoln Co. 



Additional hosts have been reported from England by Dawes (1946), Nicoll 

 (1907a, 1910a, 1915b), Arctic Russia by Issaitschikow (1928), and Chubrick 

 (1952), Sweden by Levinsen (1881), and Japan by Ozaki (1924). 



Biology: Chubrick (1952) concluded that the cercariae from Mytilus edulis and 

 the metacercariae from Liparis liparis are the intermediate stages of this 

 form in the Barents Sea; and that sometimes it is progenetic in the liparid. 



Prosorhynchus scalpellus McFarlane, 1936 



Host: Scorpaenichthys marmoraUis B.C. McFarlane, 1936 



This species is not reported elsewhere. 



Taxonomy: Nagat>- (1937) considered tliis as a synonym of Prosorhynchus 

 crucibulus. 



Biology: The life history is unknown (see Biology section under P. squamatus 

 above). 



* Asterisks denote new (previously unpublished) reports of the parasite in the area. 



