Kalmar "Genus Moschus" tana nufin rukunin ƙananan dabbobi masu kama da barewa waɗanda aka fi sani da barewa. Waɗannan dabbobin suna da ƙamshi na musamman, waɗanda ake amfani da su don samar da ƙaƙƙarfan ƙamshi mai ƙamshi mai daraja a masana'antar turare. Genus Moschus ya ƙunshi nau'ikan barewa da yawa, waɗanda ake samu a sassa daban-daban na Asiya, ciki har da China, Rasha, da yankin Himalayan.