Hyla
Hyla is a genus of tree frogs in the family Hylidae. Over the years, scientists have changed their minds about which frog species should be in Hyla and which should be in Litoria, Ranoidea or other genera.  At one time, Hyla had more than 300 species from Europe, Asia, Africa, and across the Americas. Now, Hyla has only 17 extant (living) species. They are from Europe, northern Africa and Asia. The earliest known fossil from a Hyla frog is †Hyla swanstoni from the Eocene.  The fossil was found in Saskatchewan, Canada, but it is not clear whether we would consider swanstoni a Hyla frog today.