Green and Golden Bell Frog (Litoria aurea) comparison with Genus Rana Litoria aurea (left) was first classed as a species of the genus Rana (right). There are many physical similarities including a pointy snout, long legs, and almost complete toe webbing. The overall body shape is similar to many Rana species.
(Left) Green and Golden Bell Frog, Litoria aurea, Photograph by Froggydarb http://en.wikipedia.org/wiki/User:Froggydarb
(Right) Edible Frog, Rana kl. esculenta, Photograph by Leo Bogert
Shows why Litoria aurea was first classed as rana. There are many physical similarities including; pointy snout, long legs, and almost complete toe webbing, the tympanum is large and distinct and the overall body shape is similar to many Rana species.
From http://en.wikipedia.org/wiki/Image:Litoria_aurea_Rana_comparison.jpg