_Osteocephalus_ Steindachner, 1862:77 [Type species.--_Osteocephalus taurinus_ Steindachner, 1862, by original designation]. Not _Osteocephalus_ Fitzinger, 1843:50 (_nomen nudum_).
_Diagnostic Definition._--1) Skull broader than long; 2) dermal roofing bones of skull well ossified, exostosed, and/or co-ossified in some species; 3) prenasal and internasal bones absent; 4) parasphenoid alae posterolaterally oriented; 5) dentigerous processes of prevomers angular (/--\); 6) vocal sacs paired, posterior, and when inflated protruding posteroventral or posterolateral to angles of jaws; 7) submentalis muscle moderate in size and araphic; 8) intermandibularis muscle undifferentiated and bearing an elongate median aponeurosis; 9) parotoid glands absent or poorly developed, skin not producing viscous secretion characteristic of _Phrynohyas_; 10) skin on dorsum tuberculate in males, smooth in females; 11) tympanum large, 60 percent or more of diameter of eye; 12) fingers about one-third, toes more than three-fourths webbed; 13) discs large, round; 14) nuptial excrescences present in breeding males; 15) inner metatarsal tubercle not modified for digging; 16) outer metatarsal tubercle absent; 17) tarsal fold weak or absent; 18) pupil horizontal; 19) palpebrum clear; 20) known tadpoles having two upper and five lower rows of teeth.
TABLE 1.--Alphabetical Synonymy of the Species of _Osteocephalus_.
Trivial Name, Original Generic Name, Author, Date Current Name ---------------------------------------------------------------------- _britti (Hyla leprieurii)_ Melin, 1941 _O. leprieurii_ _buckleyi (Hyla)_ Boulenger, 1882 _O. buckleyi_ _cabrerai (Hyla)_ Cochran and Goin, 1970 _O. buckleyi_ _carri (Hyla)_ Cochran and Goin, 1970 _O. buckleyi_ _depressa (Hyla)_ Andersson, 1945 _O. taurinus_ _festae (Hyla)_ Peracca, 1904 _O. buckleyi_ _flavolineatus (Osteocephalus)_ Steindachner, 1862 _O. taurinus_ _leprieurii (Hyla)_ Duméril and Bibron, 1841 _O. leprieurii_ _orcesi (Hyla)_ Funkhouser, 1956 _O. verrucigerus_ _pearsoni (Hyla)_ Gaige, 1929 _O. pearsoni_ _planiceps (Osteocephalus)_ Cope, 1874 _O. taurinus_ _riopastazae (Hyla)_ Andersson, 1945 _O. verrucigerus_ _taurinus (Osteocephalus)_ Steindachner, 1862 _O. taurinus_ _verrucigera (Hyla)_ Werner, 1901 _O. verrucigerus_ _vilarsi (Hyla)_ Melin, 1941 _O. taurinus_