Family Trigonostomidae
 
Ceratopera Den Hartog, 1964
 
  Ceratopera axi (Riedl, 1954) (3, 5)
  Ceratopera gracilis (Graff, 1882) (3, 4)
  Ceratopera reisingeri (Riedl, 1959) (3)
  Ceratopera sellai (Steinböck, 1933) (4)
  Ceratopera steinbocki (Riedl, 1959) (3)
 
Marinellia Riedl, 1954
 
  Marinellia lingulifera Riedl, 1954 (3)
 
Paramesostoma Attems, 1896
 
  Paramesostoma neapolitanum (Graff, 1882) (3, 5)
 
Proxenetes Jensen, 1878
 
  Proxenetes angustus Ax, 1951 (3)
  Proxenetes flabellifer Jensen, 1878 (4)
 
Ptychopera den Hartog, 1964
 
  Ptychopera plebeia (Beklemischev, 1927) (3)
  Ptychopera westbladi (Luther, 1943) (3)
 
Trigonostomum O. Schmidt, 1852
 
  Trigonostomum coronatum (Graff, 1882) (3)
  Trigonostomum penicillatum (O. Schmidt, 1857) (3, 5)
  Trigonostomum quadrifolium Riedl, 1954 (3, 5)
  Trigonostomum setigerum O. Schmidt, 1852 (3, 4)
  Trigonostomum venenosum (Uljanin, 1870) (3)

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