The narial rim is wide, but wider ventrally than dorsally.
"Two New Pelycosaurs from the Lower Permian of Oklahoma"
Richard C. Fox
Nevertheless, they are distinctly brighter dorsally, paler ventrally, and average larger than the specimens listed in the account of R. m.
"Records of Harvest Mice, Reithrodontomys, from Central America, with Description of a New Subspecies from Nicaragua"
Sydney Anderson J. Knox Jones
From other hylids that occur in the same area, Hyla charadricola differs from Hyla miotympanum and H. arborescandens, both of which are green dorsally, by having a truncate snout and longer fingers with less webbing.
"A Review of the Frogs of the Hyla bistincta Group"
William E. Duellman