Many of these frogs inhabit fast-flowing mountain streams, and they typically have a remarkably pointed snout, as evidenced by common names like tip-nosed frog and scientific names like nasica or nasutus ("with a nose").

[1] In the early 21st century, molecular phylogenetic studies established that the systematic confusion was due to widespread convergent evolution between Amolops, Huia and Odorrana, which actually represent quite distinct lineages of Raninae.

And while it is not completely certain that Odorrana is in fact a distinct genus, the available evidence points towards this being so.

[1] Initial studies have revealed what seems to be several clades of Odorrana, which are sometimes considered subgenera.

But few species have had their DNA sequence data sampled, and that the convergent evolution is liable to obscure relationships if assessed by morphology alone:[1] In addition, the Phu Luang cliff frog (presently Huia aureola) might belong in Odorrana too.