8 TREMATODES OF THE PACIFIC NORTHWEST 



Family GYRODACTYLIDAE 



Gyrodactylus couesius Wood and Mizelle, 1957 



Host : Couesius plumbeus B.C. Wood & Mizelle, 1957 



This form has not been reported elsewhere. 



Gyrodactylus elegans Nordmann, 1832 



Synonym : Gyrodactylus japonicus Kikuchi, 1929 ( Yamaguti, 1940) 



Hosts : Salmo gairdnerii Wash. Guberlet, Hansen, & Kavan- 



augh, 1927 



Gasterosteus aculeatus (Experimentally) Hansen & Kavan- 



augh 



Salmo clarkii Wash. Wood & Mizelle, 1957 



Gasterosteus cataphractus Wash.f Guberlet, 1937 



Salmo trutta Wash. Wood & Mizelle, 1957 



Ophiodon elongatus Wash. Guberlet, 1937 



Salvelinus fontinalis Wash. Wood & Mizelle, 1957 



Sebastodes spp. Wash. Guberlet, 1937 



■\Gasterosteus cataphractus does not occur in the Pacific Northwest and is 

 probably reported in error. It is assumed that this should be G. aculeatus. 



Sproston (1946) listed many records from Europe. Seamster (1938) and 

 Mueller (1936) reported this form from elsewhere in the United States. It has 

 also been reported from Japan (Kikuchi, 1929). Gyrodactylus elegans is con- 

 sidered an important pathogen of fish especially in hatcheries. Mizelle (1938) 

 reviewed the literature of the family and control of epidemics. 



Gyrodactylus sp. 



Griffith (1953) reported Gyrodactylus sp. from Catostomus columbianus pa- 

 louseaniis from Washington; Shaw, Simms, and Muth (1934) reported it from 

 Salmo gairdnerii from Oregon; and Shaw (1933) reported it from hatcheries in 

 Oregon. 



Family HEXABOTHRIIDAE 



Rajonchocotyle batis Cerfontaine, 1899 



Synonyms : Rajonchocotyle ovata Guberlet, 1937 

 Rajonchocotyle zvehri Price, 1942 



Hosts : Raja binoculata Wash. Guberlet, 1937 ; Bonham, 1950 



Raja stellulata Wash. Price, 1942 



Cerfontaine (1899) reported this worm from Raja batis from Europe. Win- 

 ters (1955) considered R. ovata and R. zi'ehri to be synonj'ms of R. batis al- 

 though Sproston (1946) had not done so. 



