Kalmar “genus” tana nufin matsayi na haraji da aka yi amfani da shi wajen tantance rayayyun halittu, ƙasa da iyali da kuma sama da matakin jinsuna. Ana amfani da shi don rukuni na kud da kud da kwayoyin halitta masu irin wannan halaye. An fi sanin waɗannan ƙudaje da nama saboda tsutsansu suna cin naman matattun dabbobi. Saboda haka, kalmar “Genus Sarcophaga” tana nufin rukunin ƙudaje na nama waɗanda ke da halaye iri ɗaya kuma an rarraba su tare a matakin jinsi a cikin tsarin rarrabuwa na kimiyya.