1. Subfamily Bathochordaeinae Lohmann, 1915
   1. Genus Bathochordaeus Chun, 1900
      1. Species Bathochordaeus charon Chun, 1900
      2. Species Bathochordaeus mcnutti Sherlock, Walz, Schlining & Robison, 2017
      3. Species Bathochordaeus stygius Garstang, 1937
   2. Genus Mesochordaeus Fenaux & Youngbluth, 1990
      1. Species Mesochordaeus bahamasi Fenaux & Youngbluth, 1990
      2. Species Mesochordaeus erythrocephalus Hopcroft & Robison, 1999
2. Subfamily Oikopleurinae Lohmann, 1896
   1. Tribe Alabiata Fenaux, 1993
      1. Genus Althoffia Lohmann, 1892
         1. Species Althoffia tumida Lohmann, 1892
         2. Species Althoffia australis Bückmann, 1924 accepted as Pelagopleura australis (Bückmann, 1924) (genus transfer)
         3. Species Althoffia gracilis Lohmann, 1914 accepted as Pelagopleura gracilis (Lohmann, 1914) (genus transfer)
         4. Species Althoffia oppressa Lohmann, 1914 accepted as Pelagopleura oppressa (Lohmann, 1914) (genus transfer)
         5. Species Althoffia pacifica Essenberg, 1926 accepted as Pelagopleura gracilis (Lohmann, 1914)
         6. Species Althoffia verticalis Lohmann, 1914 accepted as Pelagopleura verticalis (Lohmann, 1914) (genus transfer)
      2. Genus Mesoikopleura Fenaux, 1993
         1. Species Mesoikopleura enterospira Fenaux, 1993
         2. Species Mesoikopleura gyroceanis Fenaux, 1993
         3. Species Mesoikopleura haranti (Vernières, 1934)
         4. Species Mesoikopleura youngbluthi Fenaux, 1993
      3. Genus Pelagopleura Lohmann in Lohmann & Buckmann, 1926
         1. Species Pelagopleura australis (Bückmann, 1924)
         2. Species Pelagopleura gracilis (Lohmann, 1914)
         3. Species Pelagopleura magna Tokioka, 1964
         4. Species Pelagopleura oppressa (Lohmann, 1914)
         5. Species Pelagopleura verticalis (Lohmann, 1914)
         6. Species Pelagopleura antarctica Tokioka, 1964 accepted as Pelagopleura australis (Bückmann, 1924)
         7. Species Pelagopleura haranti Vernières, 1934 accepted as Mesoikopleura haranti (Vernières, 1934) (genus transfer)
      4. Genus Sinisteroffia Tokioka, 1957 (uncertain > taxon inquirendum, Fenaux (1998) considers the existance of this species suspect)
         1. Species Sinisteroffia scrippsi Tokioka, 1957 (uncertain > taxon inquirendum, Fenaux (1998) considers the existance of this species suspect, and likely a preservation artifact)
   2. Tribe Labiata Fenaux, 1993
      1. Genus Chunopleura Lohmann, 1914
         1. Species Chunopleura microgaster Lohmann, 1914 (uncertain > nomen dubium)
      2. Genus Folia Lohmann, 1892
         1. Species Folia gracilis Lohmann, 1892
         2. Species Folia mediterranea (Lohmann, 1899)
         3. Species Folia aethiopica Lohmann, 1892 accepted as Folia gracilis Lohmann, 1892 (since Lohmann & Bückmann 1926 the species name gracilis is always used, although page priority is aethiopica)
         4. Species Folia gigas Garstang & Georgeson, 1935 (uncertain > nomen dubium, description based on a single incomplete specimen with no subsequent records)
      3. Genus Megalocercus Chun, 1887
         1. Species Megalocercus abyssorum Chun, 1887
         2. Species Megalocercus huxleyi (Ritter in Ritter & Byxbee, 1905)
         3. Species Megalocercus altanticus Lohmann, 1914 accepted as Megalocercus abyssorum Chun, 1887
         4. Species Megalocercus diegensis Essenberg, 1926 accepted as Stegosoma magnum (Langerhans, 1880)
         5. Species Megalocercus megastoma Aida, 1907 accepted as Megalocercus huxleyi (Ritter in Ritter & Byxbee, 1905)
      4. Genus Oikopleura Mertens, 1830
         1. Subgenus Oikopleura (Coecaria) Lohmann, 1933
            1. Species Oikopleura (Coecaria) fusiformis Fol, 1872
               1. Subspecies Oikopleura (Coecaria) fusiformis cornutogastra Aida, 1907
               2. Forma Oikopleura (Coecaria) fusiformis f. typica Fol, 1872 (uncertain > taxon inquirendum, if Fenaux (1993, 1998) is correct then there must be a match for O. fusiformis cornustogastra, but none has been formally defined)
            2. Species Oikopleura (Coecaria) gracilis Lohmann, 1896
            3. Species Oikopleura (Coecaria) intermedia Lohmann, 1896
            4. Species Oikopleura (Coecaria) longicauda (Vogt, 1854)
         2. Subgenus Oikopleura (Vexillaria) Lohmann, 1933
            1. Species Oikopleura (Vexillaria) albicans (Leuckart, 1854)
            2. Species Oikopleura (Vexillaria) caudaornata (Fenaux & Youngbluth, 1991)
            3. Species Oikopleura (Vexillaria) cophocerca (Gegenbaur, 1855)
            4. Species Oikopleura (Vexillaria) dioica Fol, 1872
            5. Species Oikopleura (Vexillaria) gaussica Lohmann, 1905
            6. Species Oikopleura (Vexillaria) gorskyi Flood, 2000
            7. Species Oikopleura (Vexillaria) inflata (Fenaux & Youngbluth, 1991)
            8. Species Oikopleura (Vexillaria) labradoriensis Lohmann, 1892
            9. Species Oikopleura (Vexillaria) parva Lohmann, 1896
            10. Species Oikopleura (Vexillaria) rufescens Fol, 1872
            11. Species Oikopleura (Vexillaria) vanhoeffeni Lohmann, 1896
            12. Species Oikopleura (Vexillaria) villafrancae Fenaux, 1992
                1. Subspecies Oikopleura (Vexillaria) villafrancae indentacauda Fenaux, 1992
         3. Species Oikopleura albida Lohmann, 1913 accepted as Oikopleura (Vexillaria) albicans (Leuckart, 1854)
         4. Species Oikopleura bifurcata Quoy & Gaimard, 1833 accepted as Fritillaria pellucida typica (Busch, 1851)
         5. Species Oikopleura californica Essenberg, 1926 accepted as Oikopleura (Coecaria) gracilis Lohmann, 1896
         6. Species Oikopleura drygalski Lohmann & Bückmann, 1926 accepted as Oikopleura (Vexillaria) gaussica Lohmann, 1905
         7. Species Oikopleura flabellum Traustedt, 1880 accepted as Oikopleura (Vexillaria) dioica Fol, 1872
         8. Species Oikopleura gaussi Lohmann, 1908 accepted as Oikopleura (Vexillaria) gaussica Lohmann, 1905
         9. Species Oikopleura graciloides Bückmann, 1924 accepted as Oikopleura (Coecaria) gracilis Lohmann, 1896
         10. Species Oikopleura huxleyi Ritter in Ritter & Byxbee, 1905 accepted as Megalocercus huxleyi (Ritter in Ritter & Byxbee, 1905) (genus transfer)
         11. Species Oikopleura magna Langerhans, 1880 accepted as Stegosoma magnum (Langerhans, 1880) (genus transfer)
         12. Species Oikopleura malmii Hartmann, 1878 accepted as Oikopleura (Vexillaria) dioica Fol, 1872
         13. Species Oikopleura mediterranea Lohmann, 1899 accepted as Folia mediterranea (Lohmann, 1899) (genus transfer)
         14. Species Oikopleura megastoma Aida, 1907 accepted as Megalocercus huxleyi (Ritter in Ritter & Byxbee, 1905)
         15. Species Oikopleura microstoma Aida, 1907 accepted as Oikopleura (Coecaria) intermedia Lohmann, 1896
         16. Species Oikopleura najadis Uebel, 1913 accepted as Oikopleura (Vexillaria) parva Lohmann, 1896
         17. Species Oikopleura spissa Fol, 1872 accepted as Oikopleura (Coecaria) longicauda (Vogt, 1854)
         18. Species Oikopleura tortugensis Brooks & Kellner, 1908 accepted as Oikopleura (Coecaria) intermedia Lohmann, 1896
         19. Species Oikopleura vahoffeni Lohmann, 1896 accepted as Oikopleura (Vexillaria) vanhoeffeni Lohmann, 1896 (lapsus calami)
         20. Species Oikopleura valdiviae Lohmann, 1905 accepted as Oikopleura (Vexillaria) gaussica Lohmann, 1905
         21. Species Oikopleura velifera Langerhans, 1880 accepted as Oikopleura (Coecaria) longicauda (Vogt, 1854)
         22. Species Oikopleura weddelli Lohmann, 1928 accepted as Oikopleura (Vexillaria) gaussica Lohmann, 1905
         23. Species Oikopleura cornutogastra (Gegenbaur, 1855) represented as Oikopleura (Coecaria) fusiformis cornutogastra Aida, 1907 (Tokioka (1951) considered it synonomous with O. fusiformis - Fenaux (1993, 1998) ws more generous. and considered it a subspecies or forma)
         24. Species Oikopleura dioica Fol, 1872 represented as Oikopleura (Vexillaria) dioica Fol, 1872
         25. Species Oikopleura vanhoffeni represented as Oikopleura (Vexillaria) vanhoeffeni Lohmann, 1896
      5. Genus Stegosoma Chun, 1887
         1. Species Stegosoma magnum (Langerhans, 1880)
         2. Species Stegosoma conogaster Garstang & Georgeson, 1935 accepted as Stegosoma magnum (Langerhans, 1880)
         3. Species Stegosoma indica Dhandapani, 1977 accepted as Stegosoma magnum (Langerhans, 1880)
         4. Species Stegosoma pellucidum Chun, 1887 accepted as Stegosoma magnum (Langerhans, 1880)
      6. Genus Inopinata Fenaux & Youngbluth, 1991 accepted as Oikopleura Mertens, 1830 (merged with Oikopleura)
         1. Species Inopinata inflata Fenaux & Youngbluth, 1991 accepted as Oikopleura (Vexillaria) inflata (Fenaux & Youngbluth, 1991) (genus transfer)
      7. Genus Mesopelagica Fenaux & Youngbluth, 1991 accepted as Oikopleura Mertens, 1830 (merged with Oikopleura)
         1. Species Mesopelagica caudaornata Fenaux & Youngbluth, 1991 accepted as Oikopleura (Vexillaria) caudaornata (Fenaux & Youngbluth, 1991) (genus transfer)
      8. Genus Vexillaria Müller, 1846 accepted as Oikopleura (Vexillaria) Lohmann, 1933 (recognized now as only a subgenus)
         1. Species Vexillaria flabellum Müller, 1846 accepted as Oikopleura (Vexillaria) dioica Fol, 1872 (Lohmann, 1896 placed it in synomym)
         2. Species Vexillaria speciosa Eisen, 1874 accepted as Oikopleura (Vexillaria) dioica Fol, 1872

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