Trigonostomidae Graff, 1905
Hyporhynchus neocomensis Fuhrmann, 1904
Trigonostomum armatum (Jensen, 1878)
Trigonostomum australis Willems, Artois, Vermin & Schockaert, 2004
Trigonostomum breitfussi (Graff, 1905)
Trigonostomum brunchorsti Graff, 1905
Trigonostomum coronatum (Graff, 1882)
Trigonostomum denhartogi (Karling, 1978)
Trigonostomum divae Marcus, 1948
Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004
Trigonostomum galapagoensis Willems, Artois, Vermin & Schockaert, 2004
Trigonostomum lilliei (Graff, 1911)
Trigonostomum messoplanoides Artois, Vermin & Schockaert, 2000
Trigonostomum mirabile (Pereyaslawzewa, 1892)
Trigonostomum nataschae Willems, Artois, Vermin & Schockaert, 2004
Trigonostomum penicillatum (Schmidt, 1857)
Trigonostomum piriforme Pereyaslawzewa, 1892
Trigonostomum prytherchi Kepner, Ferguson & Stirewalt, 1941
Trigonostomum setigerum Schmidt, 1852
Trigonostomum spinigerum Willems, Artois, Vermin & Schockaert, 2004
Trigonostomum tori Willems, Artois, Vermin & Schockaert, 2004
Trigonostomum venenosum (Uljanin, 1870)
Trigonostomum watsoni Willems, Artois, Vermin & Schockaert, 2004
