Key to the eriophyoid mites associated with Diospyros spp. in China

1 Gnathosoma usually small in comparison to body; chelicerae straight or slightly curved, pedipalps truncate, with the short form oral stylet ......................................................................................................... Eriophyidae ………...........2

- Gnathosoma large in comparison to body; chelicerae curved and bent down near base; pedipalps attenuate, with the long form oral stylet............................................................................................................ Diptilomiopidae ……........5

2 Body fusiform; dorsal annuli broad and ventral annuli narrow, empodium entire or divided ..................................... 3

- Body vermiform; annuli subequal dorsoventrally; empodium entire, shield tubercles on rear shield margin, setae directed to rear, usually divergently, shield with nets design, dorsal annuli arced ................................................... .......................................................................................................................... Aceria reticularis Liu & Kuang, 1997

3 Empodium entire........................................................................................................................................................... 4

- Empodium divided, scapular setae on rear shield margin, tibial setae present, dorsal opisthosoma with three ridges. ................................................................................................................................................ Dichopelmus lotus n. sp.

4 Scapular tubercles and setae absent ................................................................. Calacarus diopyris Liu & Kuang, 1998

- Scapular tubercles on rear shield margin, directing setae to rear, usually divergently; dorsal opisthosoma with three ridges, middorsal ridge shorter than subdorsal ridges................................. Abacarus diospyris Kuang & Hong, 1989

5 Dorsum with three obvious ridges, and middorsal ridge divided for a short distance behind shield ............................. ................................................................................................................................................ Trimeroptes kakius n. sp.

- Dorsum with a weak central ridge ............................................ Diptacus liangfengjiangensis Chen, Wei & Qin, 2004