1. Genus Spinothyra Mamet, 1976 †
2. Subfamily Endospiroplectammininae Loeblich & Tappan, 1986 † (uncertain > taxon inquirendum, see taxonomic remark)
   1. Genus Endospiroplectammina Lipina, 1970 †
3. Subfamily Endothyrinae Brady, 1884 † (uncertain > taxon inquirendum, see taxonomic remark)
   1. Genus Birectoendothyra Lipina, 1970 †
   2. Genus Endothyra Phillips, 1846 †
   3. Genus Endothyranella Galloway & Harlton in Galloway & Ryniker, 1930 †
   4. Genus Iriclinella Malakhova, 1980 †
   5. Genus Melatolla Strank, 1983 †
   6. Genus Mikhailovella Ganelina, 1956 †
   7. Genus Rectoendothyra Brazhnikova, 1983 †
   8. Genus Tuberendothyra Skipp, 1969 †
   9. Genus Vachardites Cózar, Somerville, Sanz-López & Blanco-Ferrera, 2016 †
   10. Genus Cribrothyra Ueno in Ueno & Nakazawa, 1993 † accepted as Rectoendothyra Brazhnikova, 1983 † (Subjective junior synonym Opinion of Vachard et al. (2016))
   11. Genus Plectogyra Zeller, 1950 † accepted as Endothyra Phillips, 1846 † (Subjective junior synonym in opinion of Loeblich & Tappan, 1987)
   12. Genus Priscella Mamet, 1974 † accepted as Endothyra Phillips, 1846 † (Subjective junior synonym Opinion of Brenckle (2005))
4. Subfamily Omphalotinae Vdovenko in Rauzer-Chernousova et al., 1996 † (uncertain > taxon inquirendum, see taxonomic remark)
   1. Genus Mediendothyra Brazhnikova & Vdovenko in Vdovenko, 1972 †
   2. Genus Omphalotis Shlykova, 1969 †
   3. Genus Ugurus Özdikmen, 2009 †
   4. Genus Mirifica Shlykova, 1969 † accepted as Ugurus Özdikmen, 2009 † (Junior homonym of Mirifica Fletcher, 1956 Lepidoptera)
5. Subfamily Paraendothyrinae Lipina in Rauzer-Chernousova et al., 1996 † (uncertain > taxon inquirendum, see taxonomic remark)
   1. Genus Paraendothyra Chernysheva, 1940 †
   2. Genus Cribroparaendothyra Lipina in Rauzer-Chernousova et al., 1996 † accepted as Paraendothyra Chernysheva, 1940 † (unaccepted > junior subjective synonym, Subjective junior synonym in opinion of Hance et al. (2011) [taphotaxa corresponding to a different modes of the endofaunal life of Paraendothyra])
   3. Genus Rectoparaendothyra Chermnykh, 1972 † accepted as Paraendothyra Chernysheva, 1940 † (unaccepted > junior subjective synonym, Subjective junior synonym in opinion of Hance et al. (2011) [taphotaxa corresponding to a different modes of the endofaunal life of Paraendothyra])
6. Subfamily Planoendothyrinae Vachard, Krainer & Schönlaub, 2018 † (uncertain > taxon inquirendum, see taxonomic remark)
   1. Genus Globoomphalotis Bogush, 1987 †
   2. Genus Mediopsis Bogush in Bushmina et al., 1984 †
   3. Genus Paraplectogyra Okimura, 1958 †
   4. Genus Planoendothyra Reitlinger, 1959 †
   5. Genus Semiendothyra Reitlinger, 1980 †
   6. Genus Timanella Reitlinger, 1981 †

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