so TREMATODES OF THE PACIFIC NORTHWEST 



Morphology: Described and figured by Pigulevsky (1953). While the life history 

 of neither of the two Northwest species has been worked out, a great deal 

 of information about other members of the genus is known. Frandsen 

 (1957), Pande (1937), and Kaw (1950) considered Gorgoderina to be a 

 synonym of Phyllodistomum, and DoUfus (1958) suggested that these two 

 genera be differentiated on the basis of host class : Gorgoderina from the 

 amphibians and Phyllodistoviuni from fish. Phyllodistomum life history 

 studies have been made by Beilfus (1954), Shibue (1954), Yamaguti (1958), 

 Crawford (1939), and Goodchild (1943). The genus was reviewed by Ny- 

 belin (1926), HoU (1929), Lewis (1935), Wu (1938), Fischthal (1942, 

 1943), and Meserve (1943). Other contributions to the biology of the genus 

 concern the excretory anatomy by Byrd and Venard (1940), the ecology' 

 by Groves (1945) and the embryology by Dhingra (1954). 



Family HEMIURIDAE 

 AponuTus sp. 



Shaw (1947) reported Aponurus sp. from Salvclinus mahna and Sahno 

 gairdneri from Oregon. 



Brachyphallus crenatus (Rudolphi, 1802) Odhner, 1905 



Sj'nonyms : Fasciola crcnata Rudolphi, 1802 



Distojna crcnatuni Rudolphi, 1809, nee Rudolphi, 1810, nee Molin, 



1859 

 D. appendieulatmn Rudolphi, 1819, in part 

 Distomum ventricosuni Wagener, 1860, in part 

 D. oereatum Olsson, 1867 nee Rudolphi, 1819, nee Molin, 1861 

 Apohlema oereatum Juel, 1899 

 A. appendiculatum Monticelli, 1892, in part, and Miihling, 1898, 



nee Rudolphi, 1802 

 IFaseiola serratulata Mueller, 1780 

 IDistonia oereatum of Linton, 1900 

 ?Fasetola salmonis Mueller, 1780 

 Hemiurus oereatus (Rudolphi) of Liihe, 1901 



The above synonymy is after Dawes (1946). 



Hosts : Salvclinus malma B.C. Bangham & Adams, 1954 



Oncorhynehus tshawytseha Wash. Lloyd, 1938 

 Oneorhynchus tshazvytscha Ore. Shaw, 1947 



This trematode is known from the Scandinavian arctic (Odhner, 1905), 

 Russian Arctic (Schulman and Schulman-Albova, 1953), England (Nicoll, 1915), 

 Poland (Markowski, 1933), Japan (Yamaguti, 1934), Atlantic Coast of North 

 America (Linton, 1940; Manter, 1926; Lander, 1904). 



Morphology: The morphology of this worm has been worked out in great 

 detail by Lander (1904) and again by Lloyd (1938). 



Biology: The life histories of this species and other members of the genus 

 are imknown. 



