Marinellia Riedl, 1954 (status source)
Marinellia lingulifera Riedl, 1954 (status source)
Trigonostomum Schmidt, 1852 (taxonomy source)
Trigonostomum australis Willems, Artois, Vermin & Schockaert, 2004 accepted as Trigonostomum australe Willems, Artois, Vermin & Schockaert, 2004 (original description)
Trigonostomum breitfussi (Graff, 1905) Meixner, 1924 (taxonomy source)
Trigonostomum brunchorsti Graff, 1905 (status source)
Trigonostomum denhartogi (Karling, 1978) Willems, Artois, Vermin & Schockaert, 2004 (new combination reference)
Trigonostomum divae Marcus, 1948 accepted as Trigonostomum lilliei (Graff, 1911) Meixner, 1924 (source of synonymy)
Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 (original description)
Trigonostomum galapagoenesis accepted as Trigonostomum galapagoensis Willems, Artois, Vermin & Schockaert, 2004 accepted as Trigonostomum galapagoense Willems, Artois, Vermin & Schockaert, 2004 (basis of record)
Trigonostomum galapagoensis Willems, Artois, Vermin & Schockaert, 2004 accepted as Trigonostomum galapagoense Willems, Artois, Vermin & Schockaert, 2004 (original description)
Trigonostomum intermedium (Attems, 1896) Graff, 1905 accepted as Trigonostomum coronatum (Graff, 1882) Graff, 1905 (source of synonymy)
Trigonostomum lilliei (Graff, 1911) Meixner, 1924 (taxonomy source)
Trigonostomum marki Graff, 1911 accepted as Trigonostomum penicillatum (Schmidt, 1857) Graff, 1905 (source of synonymy)
Trigonostomum nataschae Willems, Artois, Vermin & Schockaert, 2004 (original description)
Trigonostomum penicillatum (Schmidt, 1857) Graff, 1905 (taxonomy source)
Trigonostomum piriforme (Pereyaslawzewa, 1892) Graff, 1905 (status source)
Trigonostomum prytherchi Kepner, Ferguson & Stirewalt, 1941 (taxonomy source)
Trigonostomum quadrifolium Riedl, 1954 accepted as Trigonostomum coronatum (Graff, 1882) Graff, 1905 (source of synonymy)
Trigonostomum setigerum album Graff, 1905 accepted as Trigonostomum setigerum Schmidt, 1852 (source of synonymy)
Trigonostomum setigerum lunulatum Graff, 1905 accepted as Trigonostomum setigerum Schmidt, 1852 (source of synonymy)
Trigonostomum setigerum setigerum Schmidt, 1852 accepted as Trigonostomum setigerum Schmidt, 1852 (status source)
Trigonostomum spinigerum Willems, Artois, Vermin & Schockaert, 2004 (original description)
Trigonostomum tori Willems, Artois, Vermin & Schockaert, 2004 (original description)
Trigonostomum watsoni Willems, Artois, Vermin & Schockaert, 2004 (original description)

Arrawarra for Trigonostomum prytherchi Kepner, Ferguson & Stirewalt, 1941 
Australia for Trigonostomum australis Willems, Artois, Vermin & Schockaert, 2004 
Australia for Trigonostomum australis Willems, Artois, Vermin & Schockaert, 2004 
Australia for Trigonostomum prytherchi Kepner, Ferguson & Stirewalt, 1941 
Australia for Trigonostomum watsoni Willems, Artois, Vermin & Schockaert, 2004 
Australia for Trigonostomum watsoni Willems, Artois, Vermin & Schockaert, 2004 
Black Sea for Trigonostomum mirabile (Pereyaslawzewa, 1892) Graff, 1905 
Black Sea for Trigonostomum penicillatum (Schmidt, 1857) Graff, 1905 
California for Trigonostomum tori Willems, Artois, Vermin & Schockaert, 2004 
Croatian Exclusive Economic Zone for Trigonostomum penicillatum (Schmidt, 1857) Graff, 1905 
English Channel for Trigonostomum penicillatum (Schmidt, 1857) Graff, 1905 
Florida for Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 
France for Trigonostomum coronatum (Graff, 1882) Graff, 1905 
France for Trigonostomum penicillatum (Schmidt, 1857) Graff, 1905 
France for Trigonostomum penicillatum (Schmidt, 1857) Graff, 1905 
France for Trigonostomum setigerum Schmidt, 1852 
France for Trigonostomum setigerum Schmidt, 1852 
France for Trigonostomum setigerum Schmidt, 1852 
France for Trigonostomum venenosum (Uljanin, 1870) Meixner, 1924 
France for Trigonostomum venenosum (Uljanin, 1870) Meixner, 1924 
France for Trigonostomum venenosum (Uljanin, 1870) Meixner, 1924 
Greece for Trigonostomum setigerum Schmidt, 1852 
Greece for Trigonostomum setigerum Schmidt, 1852 
Greece for Trigonostomum setigerum Schmidt, 1852 
Greece for Trigonostomum setigerum Schmidt, 1852 
Italy for Trigonostomum penicillatum (Schmidt, 1857) Graff, 1905 
Italy for Trigonostomum venenosum (Uljanin, 1870) Meixner, 1924 
Kenyan Exclusive Economic Zone for Trigonostomum denhartogi (Karling, 1978) Willems, Artois, Vermin & Schockaert, 2004 
Kenyan Exclusive Economic Zone for Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 
Kenyan Exclusive Economic Zone for Trigonostomum setigerum Schmidt, 1852 
Kerguelen Exclusive Economic Zone for Trigonostomum nataschae Willems, Artois, Vermin & Schockaert, 2004 
Kerguelen Exclusive Economic Zone for Trigonostomum venenosum (Uljanin, 1870) Meixner, 1924 
Netherlands Antilles for Trigonostomum denhartogi (Karling, 1978) Willems, Artois, Vermin & Schockaert, 2004 
Netherlands Antilles for Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 
Netherlands Antilles for Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 
Norwegian Exclusive Economic Zone for Trigonostomum armatum (Jensen, 1878) Graff, 1905 
Norwegian Exclusive Economic Zone for Trigonostomum armatum (Jensen, 1878) Graff, 1905 
Norwegian Exclusive Economic Zone for Trigonostomum venenosum (Uljanin, 1870) Meixner, 1924 
Norwegian Exclusive Economic Zone for Trigonostomum venenosum (Uljanin, 1870) Meixner, 1924 
Pacific Ocean for Trigonostomum denhartogi (Karling, 1978) Willems, Artois, Vermin & Schockaert, 2004 
Pacific Ocean for Trigonostomum denhartogi (Karling, 1978) Willems, Artois, Vermin & Schockaert, 2004 
Pacific Ocean for Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 
Pacific Ocean for Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 
Pacific Ocean for Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 
Pacific Ocean for Trigonostomum spinigerum Willems, Artois, Vermin & Schockaert, 2004 
Pacific Ocean for Trigonostomum watsoni Willems, Artois, Vermin & Schockaert, 2004 
Sweden for Trigonostomum breitfussi (Graff, 1905) Meixner, 1924 
Sweden for Trigonostomum breitfussi (Graff, 1905) Meixner, 1924 
Sweden for Trigonostomum breitfussi (Graff, 1905) Meixner, 1924 
Sweden for Trigonostomum venenosum (Uljanin, 1870) Meixner, 1924 
Tanzanian Exclusive Economic Zone for Trigonostomum franki Willems, Artois, Vermin & Schockaert, 2004 
United Kingdom for Trigonostomum setigerum Schmidt, 1852 

 Status

 for Trigonostomum prytherchi Kepner, Ferguson & Stirewalt, 1941

Was considered a synonym of T. lilliei by Willems et al. (2004), but is considered a separate species by Artois et ... [details]