Bolivian Spiny-backed Frog

"Osteocephalus castaneicola" is a species of frog in the family Hylidae. It is found in lowland Amazonia of northern Bolivia, adjacent southeastern Peru, and western Brazil. It breeds in water-filled fruit capsules of the Brazil nut, a characteristic also alluded to in its specific name "castaneicola" derived from the Latin "castanea", the root of the vernacular name "castaña" for the Brazil nut, together with the Latin "colō" meaning "to inhabit".