Systematics and taxonomy
Up to some 55 species are sometimes placed in ''Huia'', including some originally placed into the genera ''Odorrana'' and ''Eburana'', which formed a paraphyletic cluster; indeed these two genera are sometimes treated as junior synonyms of ''Huia''. The Long-snout Torrent Frog on the other hand – formerly ''Huia nasica'' – is now in ''Odorrana''. But many of the moves to ''Huia'' seem to be premature and it is better to treat ''Odorrana'' as valid, in a more comprehensive way and including ''Eburana'', than expanding ''Huia''. For as it seems, even in the revised delimitation the genus is still paraphyletic with ''Meristogenys''. Either the latter genus is included here, or ''Huia'' is restricted to the type species (the Hole-in-the-head Frog, ''H. cavitympanum'') and what might be its closest living relatives (e.g. an undescribed species from Sumatra), or some species of ''Huia'' - e.g. the Sumatran Torrent Frog (''H. sumatrana'') - are split off again. The former alternatives seem to be more advisable as long as the interrelationships of ''Huia'' and ''Meristogenys'' species as well as the closely related ''Clinotarsus'' are as badly resolved as they are at present. ''Meristogenys'' tadpoles are furthermore characterized by a split and ridged upper lip not found in the Hole-in-the-head Frog, indicating that the genera ought to be kept separate. New species are being discovered regularly, exacerbating the Taxonomy (biology), taxonomic uncertainties.Cai ''et al.'' (2007)Species
The following species are recognised in the genus ''Huia'': * ''Huia cavitympanum'' – Hole-in-the-head Frog * ''Huia masonii'' – Javan Torrent Frog * ''Huia melasma'' * ''Huia sumatrana'' – Sumatran Torrent Frog * ''Huia modiglianii''Footnotes
References
* (2007): Paraphyly of Chinese ''Amolops'' (Anura, Ranidae) and phylogenetic position of the rare Chinese frog, ''Amolops tormotus''. ''Zootaxa'' 1531: 49–55