- Idomacromiidae Tillyard & Fraser, 1940
- Nesocordulia, Nesocordulia coloratissima (nomen dubium), Nesocordulia evanida (nomen dubium), Nesocordulia flavicauda, Nesocordulia fossa (nomen dubium), Nesocordulia ipsio (nomen dubium), Nesocordulia lyricauda, Nesocordulia malgassica, Nesocordulia mascarenica, Nesocordulia odonator (nomen dubium), Nesocordulia rubricauda, Nesocordulia spinicauda, Nesocordulia villiersi, Idomacromia, Idomacromia jillianae, Idomacromia lieftincki (→ Juliecordulia lieftincki), Idomacromia proavita
- Oxygastridae Bechly, 1996
- Macromidiinae Goodman & al., 2025 : Macromidia (Idionyctidae → Macromidiidae), Macromidia asahinai, Macromidia atrovirens, Macromidia donaldi, Macromidia ellenae, Macromidia fulva, Macromidia genialis, Macromidia ishidai, Macromidia kelloggi, Macromidia rapida, Macromidia samal
- Oxygastrida Bechly, 1996
- Oxygastrinae Bechly, 1996 : Juliecordulia, Juliecordulia lieftincki (ad Idomacromia lieftincki)[1], Oxygastra, Oxygastra curtisii, Neocordulia, Neocordulia androgynis, Neocordulia batesi (→ Mesocordulia batesi), Neocordulia biancoi, Neocordulia campana (→ Mesocordulia campana), Neocordulia carlochagasi, Neocordulia caudacuta (→ Mesocordulia caudacuta), Neocordulia fiorentini, Neocordulia gaucha, Neocordulia griphus, Neocordulia machadoi, Neocordulia mambucabensis, Neocordulia matutuensis, Neocordulia maurocostai, Neocordulia pedroi, Neocordulia santacatarinensis, Neocordulia setifera, Neocordulia volxemi, Mesocordulia [+], Mesocordulia batesi (ad Neocordulia batesi), Mesocordulia campana (ad Neocordulia campana), Mesocordulia caudacuta (ad Neocordulia caudacuta)
- Syncorduliinae Deliry, 2014 : Siriuscordulia, Siriuscordulia serendipator (ad Syncordulia serendipator)[2], Syncordulia, Syncordulia gracilis, Syncordulia legator (→ Presba legator), Syncordulia serendipator (→ Siriuscordulia serendipator), Syncordulia venator (→ Presba venator), Presba, Presba legator (ad Syncordulia legator), Presba venator (ad Syncordulia venator)
- Micromidiinae Fleck, 2026 (nov.) : Micromidia, Micromidia atrifrons, Micromidia convergens, Micromidia rodericki
- Austrophyinae Fleck, 2026 (nov.) : Lathrocordulia, Lathrocordulia garrisoni, Lathrocordulia metallica, Austrophya, Austrophya monteithorum (→ Theischingerophya montheithorum), Austrophya mystica, Theischingerophya, Theischingerophya monteithorum (ad Austrophya monteithorum)[3]
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