Achoerus Vlasenko, 1931 nec Beklemischev, 1914 accepted as Metadena Linton, 1910 (identification resource)
Achoerus pauli Vlasenko, 1931 accepted as Metadena pauli (Vlasenko, 1931) Yamaguti, 1958 (redescription)
Asymphylodora Looss, 1899 (identification resource)
Asymphylodora atherinopsidis Annereaux, 1947 (redescription)
Asymphylodora carpiae Szidat, 1943 (redescription)
Asymphylodora demeli Markowski, 1935 (redescription)
Asymphylodora exspinosa (Hausmann, 1896) Looss, 1899 (additional source)
Asymphylodora ferruginosa (von Linstow, 1877) Lühe, 1909 (additional source)
Asymphylodora imitans (Mühling, 1898) Looss, 1899 (redescription)
Asymphylodora indica Srivastava, 1936 (redescription)
Asymphylodora japonica Yamaguti, 1938 (redescription)
Asymphylodora kedarai Srivastava, 1951 (redescription)
Asymphylodora kubanica Issaitschikov, 1923 (redescription)
Asymphylodora macracetabulum Belous in Sobolev, 1955 accepted as Asymphylotrema macracetabulum (Belous in Sobolev, 1955) Dvoriadkin & Besprozvannykh, 1985 (original description)
Asymphylodora macrostoma Ozaki, 1925 accepted as Asymphylodora innominata (Faust, 1924) Shimazu, Urabe & Grygier, 2011 (redescription)
Asymphylodora markewitschi Kulakowskaja, 1947 accepted as Parasymphylodora markewitschi (Kulakowskaja, 1947) (redescription)
Asymphylodora pontica Chernyshenko, 1949 (redescription)
Asymphylodora progenetica Serkova & Bykhowskii, 1940 (redescription)
Asymphylodora tincae (Modeer, 1790) Lühe, 1909 (redescription)
Asymphylodora tincae kubanicum Issaitschikov, 1923 accepted as Asymphylodora kubanicum Issaitschikov, 1923 accepted as Asymphylodora kubanica Issaitschikov, 1923 (redescription)
Asymphylodorinae Szidat, 1943 (identification resource)
Diplomonorchis Hopkins, 1941 (identification resource)
Diplomonorchis bivitellosus (Manter, 1940) Hopkins, 1941 (redescription)
Diplomonorchis leiostomi Hopkins, 1941 (redescription)
Genolopa Linton, 1910 (identification resource)
Genolopa ampullacea Linton, 1910 (redescription)
Genolopa cacuminata Nicoll, 1915 accepted as Lasiotocus cacuminatus (Nicoll, 1915) Thomas, 1959 accepted as Alloinfundiburictus cacuminatus (Nicoll, 1915) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Genolopa pisodontophidis (Yamaguti, 1938) Manter, 1942 accepted as Proctotrematoides pisodontophidis Yamaguti, 1938 (redescription)
Genolopa plectorhynchi (Yamaguti, 1934) Hopkins, 1941 (redescription)
Genolopa trifolifer Nicoll, 1915 accepted as Lasiotocus trifolifer (Nicoll, 1915) Thomas, 1959 accepted as Paralasiotocus trifolifer (Nicoll, 1915) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Hurleytrema Srivastava, 1939 (identification resource)
Hurleytrema chaetodoni Manter, 1942 accepted as Hurleytrematoides chaetodoni (Manter, 1942) Yamaguti, 1954 (redescription)
Hurleytrema eucinostomi Manter, 1942 accepted as Pseudohurleytrema eucinostomi (Manter, 1942) Yamaguti, 1954 (redescription)
Hurleytrema ovocaudatum Srivastava, 1939 (redescription)
Lasiotocus mulli (Stossich, 1883) Odhner, 1911 (status source)
Monorcheides Odhner, 1905 (identification resource)
Monorcheides cumingiae (Martin, 1938) Martin, 1939 (redescription)
Monorcheides diplorchis Odhner, 1905 (redescription)
Monorcheides petrowi Layman, 1930 accepted as Bacciger petrowi (Layman, 1930) Zhukov, 1960 accepted as Pentagramma petrowi (Layman, 1930) Margolis & Ching, 1965 accepted as Pseudopentagramma petrowi (Layman, 1930) Yamaguti, 1971 accepted as Pronoprymna petrowi (Layman, 1930) Bray & Gibson, 1980 (redescription)
Monorcheides soldatovi Issaitschkow, 1928 (redescription)
Monorcheidinae Odhner, 1905 accepted as Monorchiinae Odhner, 1911 (identification resource)
Monorchiidae Odhner, 1911 (identification resource)
Monorchiinae Odhner, 1911 (identification resource)
Monorchis Monticelli, 1893 (identification resource)
Monorchis latus Manter, 1942 (redescription)
Monorchis monorchis (Stossich, 1890) Looss, 1902 (redescription)
Monorchis parvus Looss, 1902 (redescription)
Palaeorchis Szidat, 1943 (identification resource)
Palaeorchis diplorchis (Yamaguti, 1936) Szidat, 1943 (redescription)
Palaeorchis incognitus Szidat, 1943 (redescription)
Palaeorchis skrjabini Koval, 1950 (redescription)
Palaeorchis unicus Szidat, 1943 (redescription)
Paramonorcheides Yamaguti, 1938 (identification resource)
Paramonorcheides awatati Yamaguti, 1938 (redescription)
Paramonorcheides sirembonis Yamaguti, 1938 (redescription)
Paraproctotrema Yamaguti, 1934 (identification resource)
Paraproctotrema brevicaecum Manter, 1942 accepted as Genolopa brevicaecum (Manter, 1942) Manter & Pritchard, 1961 (redescription)
Paraproctotrema elongatum (Manter, 1931) Sobolev, 1955 accepted as Genolopa elongata Manter, 1931 accepted as Lasiotocus elongatus (Manter, 1931) Thomas, 1959 accepted as Proctotrema elongatum (Manter, 1931) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (new combination reference)
Paraproctotrema elongatum (Manter, 1931) Sobolev, 1955 accepted as Genolopa elongata Manter, 1931 accepted as Lasiotocus elongatus (Manter, 1931) Thomas, 1959 accepted as Proctotrema elongatum (Manter, 1931) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Paraproctotrema fusiforme Yamaguti, 1934 (redescription)
Physochoerus Poche, 1926 (identification resource)
Postmonorchis Hopkins, 1941 (identification resource)
Postmonorchis orthopristis Hopkins, 1941 (redescription)
Pristisomum Looss in Odhner, 1911 (additional source)
Proctotrema Odhner, 1911 (identification resource)
Proctotrema bacilliovatum Odhner, 1911 (redescription)
Proctotrema beauforti (Hopkins, 1941) Manter, 1942 accepted as Alloinfundiburictus beauforti (Hopkins, 1941) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Proctotrema costaricae Manter, 1940 accepted as Lasiotocus costaricae (Manter, 1940) Yamaguti, 1954 accepted as Alloinfundiburictus costaricae (Manter, 1940) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Proctotrema lintoni Manter, 1931 accepted as Lasiotocus lintoni (Manter, 1931) Thomas, 1959 accepted as Alloinfundiburictus lintoni (Manter, 1931) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Proctotrema longicaecum Manter, 1940 accepted as Lasiotocus longicaecum (Manter, 1940) Yamaguti, 1954 accepted as Alloinfundiburictus longicaecum (Manter, 1940) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Proctotrema longovatum (Hopkins, 1941) Manter, 1942 accepted as Infundiburictus longovatus (Hopkins, 1941) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Proctotrema macrorchis Yamaguti, 1934 accepted as Lasiotocus macrorchis (Yamaguti, 1934) Yamaguti, 1954 accepted as Paralasiotocus macrorchis (Yamaguti, 1934) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Proctotrema malasi Nagaty, 1948 accepted as Lasiotocus malasi (Nagaty, 1948) Yamaguti, 1954 (redescription)
Proctotrema minutum (Manter, 1931) Manter, 1942 accepted as Lasiotocus minutus (Manter, 1931) Thomas, 1959 (redescription)
Proctotrema odhneri Srivastava, 1939 accepted as Lasiotocus odhneri (Srivastava, 1939) Yamaguti, 1954 (redescription)
Proctotrema parvum Manter, 1942 accepted as Lasiotocus parvus (Manter, 1942) Yamaguti, 1954 accepted as Paralasiotocus parvus (Manter, 1942) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Proctotrema truncatum (Linton, 1910) Manter, 1940 accepted as Lasiotocus truncatus (Linton, 1910) Thomas, 1959 accepted as Infundiburictus truncatus (Linton, 1910) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)
Telolecithus Lloyd & Guberlet, 1932 (identification resource)
Telolecithus pugetensis Lloyd & Guberlet, 1932 (redescription)
Telolecithus tropicus Manter, 1940 accepted as Lasiotocus tropicus (Manter, 1940) Bartoli & Bray, 2004 accepted as Ancylocoelium tropicum (Manter, 1940) Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020 (redescription)

Aral Sea for Asymphylodora kubanica Issaitschikov, 1923 
Baltic sea for Palaeorchis incognitus Szidat, 1943 
Baltic Sea East for Palaeorchis unicus Szidat, 1943 
Barents Sea for Monorcheides soldatovi Issaitschkow, 1928 
Black Sea for Achoerus pauli Vlasenko, 1931 
Black Sea for Monorchis monorchis (Stossich, 1890) Looss, 1902 
Black Sea for Monorchis parvus Looss, 1902 
Black Sea Region for Asymphylodora kubanica Issaitschikov, 1923 
Black Sea Region for Palaeorchis incognitus Szidat, 1943 
Black Sea Region for Palaeorchis unicus Szidat, 1943 
Carolinian for Diplomonorchis leiostomi Hopkins, 1941 
Carolinian for Paraproctotrema elongatum (Manter, 1931) Sobolev, 1955 
Carolinian for Postmonorchis orthopristis Hopkins, 1941 
Carolinian for Proctotrema beauforti (Hopkins, 1941) Manter, 1942 
Carolinian for Proctotrema lintoni Manter, 1931 
Carolinian for Proctotrema longovatum (Hopkins, 1941) Manter, 1942 
Carolinian for Proctotrema minutum (Manter, 1931) Manter, 1942 
Costa Rican part of the North Pacific Ocean for Proctotrema costaricae Manter, 1940 
Europe for Asymphylodora imitans (Mühling, 1898) Looss, 1899 
Floridian for Hurleytrema chaetodoni Manter, 1942 
Floridian for Hurleytrema eucinostomi Manter, 1942 
Floridian for Monorchis latus Manter, 1942 
Floridian for Paraproctotrema brevicaecum Manter, 1942 
Floridian for Paraproctotrema elongatum (Manter, 1931) Sobolev, 1955 
Floridian for Proctotrema longicaecum Manter, 1940 
Floridian for Proctotrema parvum Manter, 1942 
Floridian for Proctotrema truncatum (Linton, 1910) Manter, 1940 
Galapagos for Proctotrema longicaecum Manter, 1940 
Galapagos Exclusive Economic Zone for Diplomonorchis bivitellosus (Manter, 1940) Hopkins, 1941 
Germany for Asymphylodora ferruginosa (von Linstow, 1877) Lühe, 1909 
India for Asymphylodora indica Srivastava, 1936 
Japan for Asymphylodora japonica Yamaguti, 1938 
Japan for Asymphylodora macrostoma Ozaki, 1925 
Japan for Palaeorchis diplorchis (Yamaguti, 1936) Szidat, 1943 
Japanese Exclusive Economic Zone for Paramonorcheides awatati Yamaguti, 1938 
Japanese part of the Inland Sea for Genolopa pisodontophidis (Yamaguti, 1938) Manter, 1942 
Japanese part of the Inland Sea for Genolopa plectorhynchi (Yamaguti, 1934) Hopkins, 1941 
Japanese part of the Inland Sea for Paraproctotrema fusiforme Yamaguti, 1934 
Kara Sea for Monorcheides soldatovi Issaitschkow, 1928 
Massachusetts Continental Shelf for Monorcheides cumingiae (Martin, 1938) Martin, 1939 
Mediterranean Sea for Monorchis monorchis (Stossich, 1890) Looss, 1902 
Mediterranean Sea for Monorchis parvus Looss, 1902 
North West European Russia for Asymphylodora progenetica Serkova & Bykhowskii, 1940 
Northern California for Asymphylodora atherinopsidis Annereaux, 1947 
Palestine for Asymphylodora imitans (Mühling, 1898) Looss, 1899 
Panama Bight for Telolecithus tropicus Manter, 1940 
Peter the Great Bay for Monorcheides petrowi Layman, 1930 
Polish part of the Baltic Sea for Asymphylodora demeli Markowski, 1935 
Red Sea for Proctotrema malasi Nagaty, 1948 
Russian Far East for Asymphylodora macracetabulum Belous in Sobolev, 1955 
Svalbard for Monorcheides diplorchis Odhner, 1905 
Switzerland for Asymphylodora exspinosa (Hausmann, 1896) Looss, 1899 
Syria for Asymphylodora carpiae Szidat, 1943 
Toyama Bay for Proctotrema macrorchis Yamaguti, 1934 
Ukraine for Asymphylodora markewitschi Kulakowskaja, 1947 
Ukraine for Palaeorchis skrjabini Koval, 1950 
Ukrainian part of the Black Sea for Asymphylodora pontica Chernyshenko, 1949