▁Syl vir ana ▁mort ens eni ▁is ▁a ▁species ▁of ▁true ▁f rog . ▁It ▁is ▁found ▁in ▁Camb odia , ▁La os , ▁and ▁Th ailand . ▁The ▁specific ▁name ▁mort ens eni ▁hon ours ▁Ole ▁The odor ▁J ensen ▁Mort ensen , ▁the ▁Dan ish ▁zo ologist ▁who ▁collected ▁the ▁hol ot ype ▁from ▁the ▁island ▁of ▁Koh ▁Ch ang . ▁Common ▁names ▁Mort ensen ' s ▁f rog ▁and ▁Koh ▁Ch ang ▁Island ▁f rog ▁have ▁been ▁proposed ▁for ▁it . ▁ ▁Syl vir ana ▁mort ens eni ▁has ▁been ▁recorded ▁in ▁ever green ▁forest ▁on ▁the ▁lower ▁s lop es ▁of ▁the ▁mountains , ▁gallery ▁forest , ▁and ▁heavily ▁dist urbed ▁areas ▁and ▁forest ▁edge ▁habit ats . ▁Clear - cut ting ▁of ▁for ests ▁is ▁a ▁threat ▁to ▁it , ▁although ▁it ▁appears ▁to ▁also ▁inhab it ▁dist urbed ▁areas . ▁ ▁References ▁ ▁mort ens eni ▁Category : Am ph ib ians ▁of ▁Camb odia ▁Category : Am ph ib ians ▁of ▁La os ▁Category : Am ph ib ians ▁of ▁Th ailand ▁Category : Am ph ib ians ▁described ▁in ▁ 1 9 0 3 ▁Category : T ax a ▁named ▁by ▁George ▁Albert ▁Bou len ger <0x0A> </s> ▁The ▁We chsel ▁Form ation ▁is ▁a ▁ge olog ic ▁formation ▁in ▁Germany . ▁It ▁pres erves ▁foss ils ▁d ating ▁back ▁to ▁the ▁Perm ian ▁period . ▁ ▁See ▁also ▁▁ ▁List ▁of ▁foss il ifer ous ▁strat ig raph ic ▁units ▁in ▁Germany ▁ ▁References