Superfamily Brachycladioidea Odhner, 1905
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The Acanthocolpidae Lühe, 1906, is a fairly large family of digenetic trematodes that infect the gastrointestinal tract of marine teleost fishes. They are cosmopolitan in distribution with representatives occurring in all the oceans. Members of the family are characterised by a spinous tegument, the lack of an external seminal vesicle and the presence of a uterine seminal receptacle (Bray, 2005). Lühe (1906) erected the subfamily Acanthocolpinae Lühe, 1906, to include the genera Acanthocolpus Lühe, 1906, Stephanochasmus Looss, 1900 (=Stephanostomum Looss, 1899), and Deropristis Odhner, 1902. The subfamily was elevated to family rank by Lühe (1909).