Macrostomida Karling, 1940
Acanthomacrostomum Papi & Swedmark, 1959
Austromacrostomum Rieger, 1971
Bathymacrostomum Faubel, 1977
Cylindromacrostomum Rieger, 1971
Dolichomacrostomum Luther, 1947
Karlingia Ferguson, 1954
Megamorion Rieger & Sterrer, 1968
Meiocheta Rieger, 1971
Myomacrostomum Rieger, 1986
Myozonaria Rieger, 1968
Paramacrostomum Riedel, 1932
Paramalostomum Fize, 1963
Paramyozonaria Rieger, 1971
Paromalostomum Ax, 1951
