The genus
Glis originated in the mid-
Oligocene. It did not become common until the
Pliocene. Only one species,
Glis sackdillingensis is known to have survived into the
Pleistocene. This is probably likely the ancestor of the modern species, which appeared in the early to mid-Pleistocene. One former species,
Glis truyolsi, has been placed in the genus
Myoglis and it has been suggested that
G. apertus,
G. galitopouli,
G. guerbuezi,
G. major and
G. transversus be moved there as well. ==Etymology==