Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla The Machu Picchu arboreal chinchilla rat,'' Cuscomys oblativus ', babban nau'i ne na kudancin kudancin Amirka, wanda aka sani daga ragowar kwarangwal da aka samu daga mambobi na Peruvian Expediton na 1912.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Rashin cinikin chinchilla na Machu Picchu, 'Cuscomys oblativus', babban nau'in ratsan chinchilla ne na Kudancin Amurka, wanda aka sani daga ragowar da aka samo a 1912, an binne su tare da mutane a cikin tsoffin kaburburan Inca a Machu Picchu a Peru. "