Psilostomidae or Psilostomatidae is a family of trematodes belonging to the order Plagiorchiida.
Genera Genera: Astacatrematula Macy & Bell, 1968 Gyrosoma Bryd, Bogitsh, Maples, 1961 Mesaulus Braun, 1902 Pseudopsilostoma Yamaguti, 1958 Psilochasmus Luhe, 1909 Psilostomum Looss, 1899 Psilotornus Byrd & Prestwood, 1969 Ribeiroia Travassos, 1939 Sphaeridiotrema Odhner, 1913 Stephanoproraoides Price, 1934
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