(Section Oligocotylea Monticelli) P- ^^^ 



1 



There is a misprint- -Oliocotylea in the text of the work. 



1. Family Tristomidae Beneden, 1858 (n) 



Subfamily: 



1. Tristominae [genera Tristomum , Trochopus ( = Placunella )] 



2. Acanthocotylinae* (genus Acanthocotyle ) 



3. Ancyrocetylinae [gen. Ancyrocetyle , Epibdella 



( =Phylomella ), Nitschia ] 



4. Encotyllabinae (gen. Encotyllabe ). 



2. Family Monocotylidae Taschenberg, 1879. 



Subfamily: 



1. Monocotylinae* (gen. Monocotyle ) 



2. Pseudocotylinae* [gen. Pseudocotyle (= Microbothrium )] 



3. Calycotylinae* (gen. Calycotyle ) 



4. Anisocotylinae* (gen. Anoplodiscus , Merizocotyle, 



Lophocotyle, Dionchus). 



3. Family Udonellidae Beneden and Hesse, 1868(n). 



Subfamily: 



1. Udonellidae (gen. Udonella , Echinella , Pteronella ) 



4. Family Calceostomidae Parona and Perugia, 1890(n) 



Subfamily : 



1. Calceostonninae (gen. Calceostoma , Fredericianella ) 



5. Family Gyrodactylidae Beneden, 1863(n) 



Subfamily: 



1. Gyrodactylinae (gen. Gyrodactylus , Dactylogyrus) 



2. Tetraonchinae* [gen. Tetraonchu s (= Ancyrocephalu s= 



Amphibdella= Dactylodiscus )] 



3. Diplectaninae* (gen. Diplectanum ) 



6. Family Dicotylidae(nn) 



Subfamily: 



1, Dicotylinae* (gen. Sphyranura) 



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