▁found ▁in ▁sout he astern ▁Brazil ▁as ▁well ▁as ▁in ▁the ▁Or in oco ▁Bas in ▁in ▁Venezuela , ▁Colombia , ▁and ▁Brazil . ▁These ▁are ▁tree - d well ing ▁species ▁usually ▁hiding ▁in ▁the ▁c is tern s ▁of ▁e pi ph yt ic ▁b rom eli ads . ▁The ▁top ▁of ▁the ▁head ▁car ries ▁a ▁b ony ▁plate ▁which ▁is ▁f used ▁with ▁the ▁skin . ▁ ▁Species ▁The ▁genus ▁is ▁composed ▁of ▁five ▁species : ▁ ▁References ▁▁▁ ▁( 1 9 7 0 b ): ▁The ▁evolution ary ▁relationships ▁of ▁cas que - head ed ▁tree f ro gs ▁with ▁co - oss ified ▁sk ull s ▁( family ▁H yl idae ). ▁- ▁Un iv . ▁Kansas ▁Pub l . ▁Mus . ▁Nat . ▁Hist . ▁ 1 8 , ▁pp . ▁[ 5 4 7 - 7 1 6 ] ▁ ▁External ▁links ▁▁ ▁tax on ▁A par as phen odon ▁at ▁http :// www . e ol . org . ▁▁ ▁Tax on ▁A par as phen odon ▁at ▁https :// web . archive . org / web / 2 0 1 6 0 6 0 6 0 4 3 8 0 8 / http :// www . itis . gov / index . html . ▁( Access ed : ▁A pr ▁ 2 4 , ▁ 2 0 0 8 ). ▁▁ ▁Tax on ▁A par as phen odon ▁at ▁https :// web . archive . org / web / 2 0 0 8