AUT. 13 TREMATODE PARASITES OF MARINE MAMMALS PRICE O 



Family FASCIOLIDAE Railliet, 1895 



Synonyms. — Fasciolopsidae Odhner, 192G, p. 4; Campulidae 

 Odliner, 1926, p. 5 ; Brachycladiidae Faust, 1929, p. 88. 



Family diagnosis. — Large flat forms; suckers relatively close to- 

 gether; cuticle with or without spines. Intestinal ceca simple or 

 with lateral dendritic branches. Excretory bladder simple and tube- 

 like, or profusely branched. Genital pore preacetabular ; cirrus 

 pouch present; cirrus armed or unarmed. Testes usually pro- 

 fusely branched, but may be without branches or lobes. Ovary 

 branched or entire; seminal receptacle reduced or absent; Laurer's 

 canal present. Vitellaria profusely developed, consisting of numer- 

 ous follicles situated along the sides of the body and becoming 

 confluent posteriorly. Uterus with relatively few coils; eggs large, 

 either circular or triangular in cross section. 



Type genus. — Fasciola Linnaeus, 1758. 



KEY TO SUBFAMILIES OF FASCIOLIDAE CONTAINING SPECIES PARASITIC IN MARINE 



MAMMALS 



1. Body flat, leaf like; testes and ovary profusely branched; eggs 

 without thickening at posterior pole, circular in cross section. 



Fasciolinae (p. 3). 

 Body elongated and slightly flattened, but not leaflike; testes 

 and ovary usually unbranched ; eggs with thickening at pos- 

 terior pole, usually triangular in cross section Campulinae (p. 5). 



Subfamily Fasciolinae Stiles and Hassall, 1898 



Subfamily diagnosis. — Fasciolidae: Body flat and leaf like. In- 

 testinal ceca profusely branched, the branches being dendritic and 

 mainly lateral. Excretory vesicle with lateral branches. Testes 

 profusely branched; cirrus pouch not extending beyond posterior 

 margin o,f acetabulum; cirrus unarmed. Ovary branched. Eggs 

 without thickening at posterior pole, circular in cross section. Para- 

 sites of herbivorous or omnivorous mammals. 



J'ype ge7ius. — Fasciola Linnaeus, 1758. 



Genus FASCIOLA Linnaeus, 1758 



Gene7'io diagnosis. — Fasciolinae : Body large, broad, flat, and leaf- 

 like; anterior end conical, forming a cephalic cone, which is set off 

 from the wider, flattened, leaflike portion. Cuticle armed with scale- 

 like spines. Oral sucker subterminal ; acetabulum at base of cephalic 

 cone. Prepharynx short ; pharynx well developed ; esophagus short ; 

 intestinal ceca long, extending to posterior end of body and provided 

 with numerous, long, dendritic lateral branches, and fewer, shorter^ 



