Estas 50 especies pertenecen al género Proisotoma:

• Proisotoma aera Christiansen & Bellinger, 1980
• Proisotoma alpa Christiansen & Bellinger, 1980
• Proisotoma ananevae Babenko & Bulavintsev, 1993
• Proisotoma anopolitana Schulz & Lyberakis, 2006
• Proisotoma antigua (Folsom, 1937)
• Proisotoma bayouensis Mills, 1931
• Proisotoma beta Christiansen & Bellinger, 1980
• Proisotoma buddenrocki Stenkzke, 1954
• Proisotoma bulba Christiansen & Bellinger, 1980
• Proisotoma bulbosa Folsom, 1937
• Proisotoma clavipila Axelson, 1903
• Proisotoma coeca da Gama, 1961
• Proisotoma communis Sánchez-García & Engel, 2016
• Proisotoma crassicauda (Tullberg, 1871)
• Proisotoma dualis
• Proisotoma dubia Christiansen & Bellinger, 1980
• Proisotoma ewingi James, 1933
• Proisotoma excavata Folsom, 1937
• Proisotoma extra Christiansen & Bellinger, 1980
• Proisotoma frisoni Folson, 1937
• Proisotoma fungi Selga, 1962
• Proisotoma immersa (Folsom, 1937)
• Proisotoma juaniae Lucianez & Simon, 1992
• Proisotoma laticauda Folsom, 1937
• Proisotoma libra Christiansen & Bellinger, 1980
• Proisotoma longispina MacGillivray
• Proisotoma macgillivaryi (Della Torre, 1895)
• Proisotoma mackenziana Hammar, 1952
• Proisotoma minima (Absolon, 1901)
• Proisotoma minuta (Tullberg, 1871)
• Proisotoma muskegis (Guthrie, 1903)
• Proisotoma najtae Selga, 1971
• Proisotoma nova Palissa, 1969
• Proisotoma obsoleta (Macgillivray, 1896)
• Proisotoma papillosa Stach, 1947
• Proisotoma rainieri Folsom, 1937
• Proisotoma ramosi Arle, 1959
• Proisotoma ripicola Linnaniemi, 1912
• Proisotoma schoetti (Dalla Torre, 1895)
• Proisotoma sepulchralis (Folsom, 1902)
• Proisotoma subminuta Denis, 1931
• Proisotoma tenella (Reuter, 1895)
• Proisotoma titusi Folsom, 1937
• Proisotoma turberculatum Stach, 1947
• Proisotoma veca (Wray, 1952)
• Proisotoma vernoga (Wray, 1958)
• Proisotoma vesiculata Folsom, 1937
• Proisotoma vetusta (Folson, 1937)
• Proisotoma woodi Christiansen & Bellinger, 1980
• † Proisotoma pettersonae Christiansen & Nascimbene, 2006