24 TREMATODES OF THE PACIFIC NORTHWEST 



Alaria marcinae (LaRue, 1917) Walton, 1950 



Synonym: Agatnodistommn marcianae haRue, 1917 



Hosts : Thamnophis sirtalis Wash. Sumwalt, 1926 



Thamnophis ordinoides Wash. Sumwalt, 1926 



In both cases these forms were larval in the snakes. Also reported from 

 Rana pipiens by LaRue, 1917. 



Alaria mustelae Bosma, 1931 



Hosts : Mustela vison Ore. Senger & Neiland, 1955 



Mustela frenata Ore. Senger & Neiland, 1955 



Additional hosts listed by Dubois (1938). 



Morphology: Bosma (1934) described the adult and larval stages in detail; 

 these are also described and figured by Dubois (1938). 



Biology : Cercariae develop in Planorhula armigera; metacercariae in tadpoles 

 and frogs — confirmed experimentally by Bosma (1934). 



Alaria oregonensis LaRue and Barone, 1932 



Host: Canis latrans testes Ore. LaRue & Barone, 1927, 1932 



Morphology: Described and figured by Dubois (1938). 

 Alaria sp. 



Cram (1926) reported an Ataria sp. from a coyote (Canis tatrans testes) 

 from Oregon, and Shaw (1947) reported a larval Ataria sp. from the Eastern 

 Brook Trout, Salvetinus fontinalis, from Oregon. 



Diplostomum sp. 



Shaw (1947) reported a Proalaria sp. from a pelican (Pcticanus sp.) 

 Proataria is now considered to be a synonym of Diplostomum (Dubois, 1938). 



Diplostomulum sp. 



Dip tost omnium is a "generic" name for metacercaria of diplostomid trema- 

 todes for which the adult form is unknown and which is unencysted in the inter- 

 mediate host. Bangham and Adams (1945) reported the following fish hosts of 

 Diplostomulum from fresh water of British Columbia : 



Prosopium wiltiamsoni Oncorhynchus kisutch 

 P. cylindraceum quadrilaterale Salmo clarki 



Catostomus catostomus S. gairdneri kamloops 



C. macrocheilus Salvetinus fontinalis 



C. commersoni S. nialnia 



Mylocheilus caurinum Couesius ptumheus 



Ptychocheilus oregonensis Richardsonius halteatus 



Gasterosteus aculeatus Lota lota 



Micropterus salmoides Coitus asper 



Cottus rhotheus 



