Kalmar "Gasterophilus" tana nufin nau'in botflies waɗanda ke lalata tsarin narkewar dawakai, jakuna, da zebra. Larvae na waɗannan kudaje, waɗanda aka fi sani da botfly maggots, suna tasowa a cikin ciki ko hanjin mai gida kuma suna iya haifar da matsalolin lafiya iri-iri. Kalmar “gasterophilus” ta samo asali ne daga kalmomin Helenanci “gaster” ma’ana ciki, da “philos” ma’ana aboki ko masoyi.