Microchiroptera wani yanki ne na harajin haraji a cikin tsari na Chiroptera, wanda aka fi sani da microbats ko jemagu na echolocating. Kalmar ta samo asali ne daga kalmomin Helenanci "micros," ma'ana karami, da "cheir," ma'ana hannu, wanda ke nufin ƙananan girman gabansu idan aka kwatanta da sauran jemagu. Sanannun jemagu na Microchiroptera saboda iyawarsu ta faɗakarwa, waɗanda suke amfani da su don kewaya cikin duhu da gano ganima. Ana kuma bambanta su da sauran rukunin jemagu, Megachiroptera, ta wurin ƙaramin girmansu da rashin ganyen hanci.