Cercaria carcini Lebour, 1908 accepted as Microphallus similis (Jägerskiöld, 1900) Baer, 1944 (source of synonymy)
Cercaria littorinaerudis Lebour, 1911 accepted as Microphallus pygmaeus (Levinsen, 1881) Baer, 1944 (source of synonymy)
Levinseniella belopolskoi Khuan, 1962 accepted as Levinseniella pellucida Jagerskiold, 1907 accepted as Levinseniella (Monarrhenos) pellucida Jagerskiold, 1907 (source of synonymy)
Levinseniella brachysoma (Creplin, 1837) Stiles & Hassall, 1902 (redescription)
Levinseniella carcinidis Rankin, 1939 accepted as Levinseniella propinqua Jägerskiöld, 1907 (source of synonymy)
Levinseniella gymnopocha Coil, 1956 accepted as Levinseniella propinqua Jägerskiöld, 1907 (source of synonymy)
Levinseniella leptophallus Coil, 1956 accepted as Levinseniella propinqua Jägerskiöld, 1907 (source of synonymy)
Levinseniella pellucida Jagerskiold, 1907 accepted as Levinseniella (Monarrhenos) pellucida Jagerskiold, 1907 (redescription)
Levinseniella propinqua Jägerskiöld, 1907 (redescription)
Levinseniella tridigitata Deblock, Capron & Biguet, 1958 accepted as Levinseniella brachysoma (Creplin, 1837) Stiles & Hassall, 1902 (source of synonymy)
Maritrema gratiosum Nicoll, 1907 (redescription)
Maritrema lepidum Nicoll, 1907 accepted as Maritrema linguilla Jägerskiöld, 1908 (source of synonymy)
Maritrema linguilla Jägerskiöld, 1908 (redescription)
Maritrema oocysta (Lebour, 1907) Rothschild, 1942 (additional source)
Maritrema subdolum Jägerskiöld, 1909 (additional source)
Microphallidae Ward, 1901 (identification resource)
Microphallus canchei Biguet, Deblock & Capron, 1958 accepted as Microphallus primas (Jägerskiöld, 1908) Stunkard, 1951 (source of synonymy)
Microphallus chabaudi Capron, Deblock & Biguet, 1958 accepted as Microphallus papillorobustus (Rankin, 1940) Baer, 1944 (source of synonymy)
Microphallus claviformis (Brandes, 1889) Baer, 1944 (additional source)
Microphallus debuni Biguet, Deblock & Capron, 1958 (additional source)
Microphallus excellens (Nicoll, 1907) Baer, 1944 accepted as Microphallus similis (Jägerskiöld, 1900) Baer, 1944 (additional source)
Microphallus papillorobustus (Rankin, 1940) Baer, 1944 (additional source)
Microphallus primas (Jägerskiöld, 1908) Stunkard, 1951 (additional source)
Microphallus pygmaeus (Levinsen, 1881) Baer, 1944 (additional source)
Microphallus similis (Jägerskiöld, 1900) Baer, 1944 (redescription)
Microphallus tringae Capron, Deblock & Biguet, 1958 accepted as Microphallus papillorobustus (Rankin, 1940) Baer, 1944 (source of synonymy)
Spelotrema carcini Guyénot, Naville & Ponse, 1925 accepted as Microphallus primas (Jägerskiöld, 1908) Stunkard, 1951 (source of synonymy)
Spelotrema excellens Nicoll, 1907 accepted as Microphallus excellens (Nicoll, 1907) Baer, 1944 accepted as Microphallus similis (Jägerskiöld, 1900) Baer, 1944 (source of synonymy)
Spelotrema magnipapillata Leonov, 1958 accepted as Spelotrema magnipapillatum Leonov, 1958 accepted as Microphallus papillorobustus (Rankin, 1940) Baer, 1944 (source of synonymy)
Spelotrema pseudogonotyla Chen, 1944 accepted as Microphallus papillorobustus (Rankin, 1940) Baer, 1944 (source of synonymy)
Spelotrema simile (Jagerskiold, 1900) Looss, 1902 accepted as Microphallus similis (Jägerskiöld, 1900) Baer, 1944 (source of synonymy)
Sphairiotrema Deblock & Tran Van Ky, 1966 (original description)
Sphairiotrema prudhoei Deblock & Tran Van Ky, 1966 (original description)
Sphairiotrematinae Deblock & Tran Van Ky, 1966 (original description)

Baltic sea for Levinseniella brachysoma (Creplin, 1837) Stiles & Hassall, 1902 
Baltic sea for Maritrema oocysta (Lebour, 1907) Rothschild, 1942 
Baltic sea for Microphallus claviformis (Brandes, 1889) Baer, 1944 
Black Sea for Maritrema oocysta (Lebour, 1907) Rothschild, 1942 
Central America for Levinseniella propinqua Jägerskiöld, 1907 
England for Levinseniella brachysoma (Creplin, 1837) Stiles & Hassall, 1902 
England for Levinseniella propinqua Jägerskiöld, 1907 
England for Maritrema gratiosum Nicoll, 1907 
England for Maritrema subdolum Jägerskiöld, 1909 
England for Microphallus claviformis (Brandes, 1889) Baer, 1944 
England for Microphallus pygmaeus (Levinsen, 1881) Baer, 1944 
England for Microphallus similis (Jägerskiöld, 1900) Baer, 1944 
Estonia for Microphallus similis (Jägerskiöld, 1900) Baer, 1944 
Europe for Microphallus claviformis (Brandes, 1889) Baer, 1944 
France for Levinseniella brachysoma (Creplin, 1837) Stiles & Hassall, 1902 
France for Levinseniella propinqua Jägerskiöld, 1907 
France for Maritrema gratiosum Nicoll, 1907 
France for Maritrema linguilla Jägerskiöld, 1908 
France for Maritrema oocysta (Lebour, 1907) Rothschild, 1942 
France for Maritrema subdolum Jägerskiöld, 1909 
France for Microphallus claviformis (Brandes, 1889) Baer, 1944 
France for Microphallus debuni Biguet, Deblock & Capron, 1958 
France for Microphallus papillorobustus (Rankin, 1940) Baer, 1944 
Germany for Microphallus pygmaeus (Levinsen, 1881) Baer, 1944 
Great Britain for Maritrema oocysta (Lebour, 1907) Rothschild, 1942 
Great Britain for Microphallus debuni Biguet, Deblock & Capron, 1958 
Jan Mayen for Microphallus pygmaeus (Levinsen, 1881) Baer, 1944 
Kurile Islands for Maritrema gratiosum Nicoll, 1907 
Murman Coast for Maritrema gratiosum Nicoll, 1907 
Orkney Isles for Levinseniella propinqua Jägerskiöld, 1907 
Orkney Isles for Sphairiotrema prudhoei Deblock & Tran Van Ky, 1966 
Russia for Levinseniella propinqua Jägerskiöld, 1907 
Russia for Maritrema gratiosum Nicoll, 1907 
Russia for Maritrema linguilla Jägerskiöld, 1908 
Russia for Microphallus similis (Jägerskiöld, 1900) Baer, 1944 
Scotland for Maritrema gratiosum Nicoll, 1907 
Scotland for Microphallus pygmaeus (Levinsen, 1881) Baer, 1944 
Scotland for Microphallus similis (Jägerskiöld, 1900) Baer, 1944 
Siberia for Levinseniella propinqua Jägerskiöld, 1907 
Sweden for Levinseniella pellucida Jagerskiold, 1907 
Sweden for Levinseniella propinqua Jägerskiöld, 1907 
Sweden for Maritrema linguilla Jägerskiöld, 1908 
Sweden for Microphallus debuni Biguet, Deblock & Capron, 1958 
Sweden for Microphallus pygmaeus (Levinsen, 1881) Baer, 1944 
Sweden for Microphallus similis (Jägerskiöld, 1900) Baer, 1944 
Wales for Levinseniella brachysoma (Creplin, 1837) Stiles & Hassall, 1902 
Wales for Levinseniella propinqua Jägerskiöld, 1907 
Wales for Maritrema subdolum Jägerskiöld, 1909 
Washington (State) for Levinseniella propinqua Jägerskiöld, 1907 
White Sea for Maritrema gratiosum Nicoll, 1907