Family Udonellidae Beneden and Hesse ( Udonella , Calinella, 

 Echinella and Pteronella) 



3. Subroder Polyopisthocotylinea Odhner p. 338 



1. Family Polystomidae ( Polystoma , Sphyranura and sp. ) 



2. Family Onchocotylidae Cerfontaine (Onchocotyle and sp. ) 



3. Fanaily Diclidophoridae Cerfontaine (Diclidophora and sp. ) 



4. Family Microcotylidae Taschenberg (Microcotyle and sp. ) 



5. Family Octocotylidae Beneden and Hesse (Octocotyle and sp. ) 



As is seen in the system of Fuhrmann,the suborder 

 Monopisthodiscinea separated by him embraces a large part of the 

 superfamily Gyrodactyloidea of Johnston and Tiegs including Mono- 

 cotylidae which are ascribed by him to the second suborder. As 

 regards the remaining groups , actually Fuhrmann does not contribute 

 anything new. The significance of the system of Fuhrmann is minimal 

 because he never worked with nnonogenetic trematodes himself and his 

 considerations about the system bear a purely speculative character. 



Later in 1936-1953 appears the series of Price containing 

 the re -examination of the system of monogenetic trematodes on the 

 basis of an independent study of the material. As we shall attempt to 

 show, in spite of the rather significant step forward in the sense that 

 it reflects natural relations of monogenetic trematodes this system 

 nevertheless has a formal character. This system has the following 

 form: 



Order MONOGENEA Carus 

 Suborder Monopisthocotylea Odhner, 1912 



Superfamily Gyrodactyloidea Johnston and Tiegs, 1922 



1. Fannily Gyrodactylidae Cobbold, 1877 



Subfamily Gyrodactylinae Monticelli, 1892 

 Subfamily Isancistrinae Fuhrmann, 1928 



2. Family Protogyrodactylidae Johnston and Tiegs, 1922 



3. Family Dactylogyridae Bychowsky, 1933 



Subfamily Dactylogyrinae Bychowsky, 1933 

 Subfamily Tetraonchinae Monticelli, 1903 

 Subfamily Diplectaninae Monticelli, 1903 

 Subfamily Bothitrematinae Price, 1936 



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