The phylogenetic tree of Paraneoptera based on Shcherbakov and Popov (2002), Kluge (2020), Gavrilov-Zimin (2020) with modifications. Higher rank taxa, including viviparous and ovoviviparous genera/families, are highlighted in green. Bold lines are used for paraphyletic taxa.

 
 
  Part of: Gavrilov-Zimin IA (2021) Egg retention, viviparity and ovoviviparity in Paraneoptera. Comparative Cytogenetics 15(3): 239-252. https://doi.org/10.3897/CompCytogen.v15.i3.70216