years ago.

Taxonomy

After Mayr, and Zelenkov (2021)

* Palaeotididae (Early mid-Eocene, Europe)
** Palaeotis
** Galligeranoides
* Geranoididae (Early-mid Eocene, North America)
* Unnamed clade
** Eogruidae (monotypic)
*** Eogrus (mid-Late Eocene, Asia)
** Sonogrus