40 TREMATODES OF THE PACIFIC NORTHWEST 



Gymnophallus obscurus Ching, 1960 



Host: Hacmatopiis bachmani Wash. Ching, 1960a 



Levinseniella propinqua Jagerskiold, 1907 



Host: Hacmatopus bachmani Wash. Ching, 1960a 



Microphallus primas (Jagerskiold, 1909) Stunkard, 1951 



Synonyms : Spelophallus primas Jagerskiold, 1909 



Microphallus primas (Jagerskiold, 1909) Stunkard, 1951 

 Spelotrcma primas (Jagerskiold, 1909) Belopol'skaya, 1952 

 Microphallus primas (Jagerskiold, 1909) Ching, 1960a 



Host: Haematopus bachmani Wash. Ching, 1960a 



Plenosoma minimum Ching, 1960 



Host: Haematopus bacJimani Wash. Ching, 1960a 



Family MONORCHIDAE 



Telolecithus pugetensis Lloyd and Guberlet, 1932 



Hosts : Cymatogaster aggregata B.C. McFarlane, 1936 



Cymatogaster aggregata Wash. Lloyd & Guberlet, 1932 



Tacniotoca lateralis Ore. *Lincoln Co. 



This trematode is unknown outside of the Pacific Northwest. 



Biology : The life historj' is unknown. Tliere is often great variation in tlie inci- 

 dence of this parasite. In the summers of 1931 and 1932 Lloyd and Guberlet 

 found nearly all the Cymatogaster aggregata examined to be infected with 

 the parasite, but in the summer of 1934 several hundred fish failed to harbor 

 a single worm (Lloyd, 1938). 



Family NANOPHYETIDAE 



Nanophyetus salmincola (Chapin, 1926) Chapin, 1927 



Synonyms : Nanophyes sahnincola Chapin, 1926 



Troglotrcma salmincola (Chapin, 1926) Witenberg, 1932 

 Distomiilum oregonensis Ward & Mueller, 1926 



Hosts : 



* Asterisks denote new (previously unpublished) reports of the parasite in the area. 



