Diploglossa is a clade of neoanguimorphs represented by the families Xenosauridae, Diploglossidae, Anniellidae and Anguidae, the latter three placed in the superfamily Anguioidea. In the past the Chinese crocodile lizard was classified as a xenosaurid; current molecular work has shown evidence the species related to varanoids in the clade Paleoanguimorpha.

Below is the phylogeny of the neoanguimorph lineages after Pyron et al. (2013):

DiploglossaXenosauridae (knob-scaled lizards) Anguioidea Diploglossidae (galliwasps) Anniellidae (American legless lizards) Anguidae (glass lizards and alligator lizards)
Xenosauridae (knob-scaled lizards)
AnguioideaDiploglossidae (galliwasps) Anniellidae (American legless lizards) Anguidae (glass lizards and alligator lizards)
Diploglossidae (galliwasps)
Anniellidae (American legless lizards) Anguidae (glass lizards and alligator lizards)
Anniellidae (American legless lizards)
Anguidae (glass lizards and alligator lizards)