Kalmar "genus Melursus" tana nufin rabe-raben haraji ga rukuni na nau'in bear wanda ya haɗa da nau'in nau'in nau'i guda ɗaya kawai, wanda shine sloth bear (Melursus ursinus). Kalmar “genus” tana nufin matakin rarrabuwa a cikin tsarin rarrabuwar halittu, wanda ke sama da matakin jinsi da ƙasa da matakin iyali. Kalmar "Melursus" ita ce sunan jinsi, wanda ya samo asali ne daga yaren Tamil kuma yana nufin "ƙudan zuma".