Ameroseiidae

Diagnosis (adults). Idiosoma oblong and dorsoventrally flattened. Dorsal shield entire, holotrichous, having at most 30 pairs of setae; setae J 1 and J 5 absent. Sternal region with separate sternal and epigynal shields in female, sternitogenital shield in male, and five pairs of sternal setae in both sexes (st 1 - st 5). Sternal shield reduced in size, but entire, with 1 - 3 pairs of sternal setae (normally two pairs); presternal platelets absent. Metasternal setae (st 4) on soft integument or endopodal platelets. Epigynal shield with a pair of genital setae (st 5); genital opening of male with presternal position. Peritremes well developed, long. Posterior ventral surface of adults with anal or ventrianal shield, and with at least four pairs of opisthogastric setae. Three circum-anal setae present. Cheliceral digits short; arthrodial membrane at base of movable digit smooth, without brush-like or filamentous processes. Palptarsal apotele with two or three tines. Hypostome with internal malae usually unmodified and lightly fringed. Tibia I with five dorsal setae; legs II of males without spur-like structures; tarsus II in female usually without enlarged spine-like distal setae; genu IV with normally nine setae, including one ventral (but aberrations exist). Mites with podospermal insemination, spermatodactyl of male present and placed on movable digit of chelicera. Female monogynaspid.