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Brachycephalus olivaceus
''Brachycephalus olivaceus'' is a species of frog in the Brachycephalidae family. It is very tiny and was one of seven new species described by LF Ribeiro and a team of scientists from the Mater Natura - Instituto de Estudos Ambientais in Brazil. Like all species in its genus, it is found in a very small strip of Atlantic Forest in the southeastern coast of the country, and has a vibrant colour pattern. The speciation seen in this genus is thought to be a byproduct of the rift between the valley versus mountain terrain and its particular microclimates, to which they are adapted. It might be in population decline due to habitat loss. Its name derives from the Latin ''olivaceus'', "olive-colored", in reference to its coloration.
==Description==
It is distinguished from other cogenerate species by having a robust body, bufoniform, with an adult length between ; a rough dorsum, and its general coloration being predominantly dark-green to brown. The skin on its dorsum shows no dermal co-ossification. Its rugose body is similar to that of ''B. mariaeterezae'' (as opposed to the smooth dorsum of other species such as ''B. izecksohni'' or ''B. pernix''. Its predominantly dark-green dorsum is distinct from all other ''Brachycephalus'' species. The species does not present dermal co-ossification characteristic of species within the ''phippium'' group, while its bufoniform shape and larger body size means it is rather larger than those in the ''didactylus'' group, averaging a length of between and in turn having leptodactyliform body shape.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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