MONOGENETIC TREMATODES 7 



Dactylogyrus columbiensis Monaco and Mizelle, 1955 



Host : Ptychocheiliis orcgoncnsis B.C. Monaco & Mizelle, 1955 



Dactylogyrus extensus Mueller and Van Cleave, 1932 



Host: Cyprinus carpio B.C. Monaco & Mizelle, 1955 



This form has been reported from New York (Mueller and Van Cleave, 

 1932) and Oklahoma (Roberts, 1957). 



Morphology : Additional by Mueller, 1936. 



Dactylogyrus mylocheilus Monaco and Mizelle, 1955 



Hosts : Mylocheilus caurinum B.C. Monaco & Mizelle, 1955 



Couesius plumhciis B.C. Monaco & Mizelle, 1955 



Dactylogyrus ptychocheilus Monaco and Mizelle, 1955 



Host : Ptychocheilus orcgoncnsis B.C. Monaco & Mizelle, 1955 



Dactylogyrus richardsonius Monaco and Mizelle, 1955 



Host : Richardsonius halteatus B.C. Monaco & Mizelle, 1955 



Dactylogyrus tridactylus Monaco and Mizelle, 1955 



Host : Ptychocheilus orcgoncnsis B.C. Monaco & Mizelle, 1955 



Dactylogyrus vancleavei Monaco and Mizelle, 1955 



Hosts : Ptychocheilus orcgoncnsis B.C. Monaco & Mizelle, 1955 



Acrochcilus alutaceum B.C. Monaco & Mizelle, 1955 



Family DISCOCOTYLIDAE 



Discocotyle salmonis Schaffer, 1916 



Hosts: Prosopium williamsoni B.C. Bangham & Adams, 1954 



Salvelinus malnta B.C. Bangham & Adams, 1954 



This trematode has been reported from New York by Schaffer (1916). 

 Price (1943) reviewed the genus. 



Octomacrum lanceatum Mueller, 1934 



Synonym: Octobothrium sagittatum Wright, 1879, nee Leuckart, nee. Olsson 



Hosts : Catostonius macro cheilus Idaho Fritts, 1959 



Catostomus macrocheilus B.C. Bangham & Adams, 1954 



Catostomus catostomus B.C. Bangham & Adams, 1954 



Mylocheilus caurinum B.C. Bangham & Adams, 1954 



This parasite has also been reported from New York by Mueller (1934). 



Octomacrum sp. 



Octomacrum sp. has been reported from Richardsonius halteatus and Coues- 

 ius plumbcus from British Columbia (Bangham and Adams, 1954). 



