1 Prodorsal shield without lines........................................................ Aceria silenes (Liro, 1940)
- Prodorsal shield with lines.............................................................................. 2
2 Empodium 7-rayed.................................................................................... 3
- Empodium less than 7-rayed.............................................................................4
3 Seta sc 20 shorter than prodorsal shield 34.......................................... Aceria georghioui Keifer, 1959
- Seta sc 45–70 longer than prodorsal shield 32–42................................... Aceria feketeistvani Ripka, 2016
4 Empodium 6-rayed....................................................................................5
- Empodium 5-rayed....................................................................................7
5 Ornamentation of prodorsal shield a network of lines................................. Aceria paradianthi Keifer, 1952
- Ornamentation of prodorsal shield not a network of lines......................................................6
6 Seta sc slightly longer than prodorsal shield, opisthosoma with 90 annuli.............. Aceria moehringiae (Lindroth, 1899)
- Seta sc distinctly shorter than prodorsal shield, opisthosoma with 63–68 annuli.................................................................................... Aceria ankarensis Denizhan, Monfreda, Cobanoglu & de Lillo, 2006
7 Prosternal apodeme distinct, sternal line present.............................................................8
- Coxae I narrowly separated, sternal line absent, and prodorsal shield without frontal lobe....... Aceria belarexi Ripka, 2016
8 Prodorsal shield semicircular.............................................................................9
- Prodorsal shield subtriangular........................................................................... 11
9 Seta 3a longer than 15 µm.............................................................................. 10
- Seta 3a short, 9 µm long........................................................ Aceria dianthi (Lindroth, 1904)
10 Prodorsal shield without frontal lobe, seta c2 35 long, female genital coverflap with 10 ridges.................................................................................................. Aceria gypsophilae Roivainen, 1950
- Prodorsal shield with a short frontal lobe, seta c2 52–55 long, female genital coverflap with 13–14 ridges.................................................................................................. Aceria wassalberti n. sp.
11 Prodorsal shield with short frontal lobe.............................................. Aceria colocense Ripka, 2013
- Prodorsal shield without frontal lobe............................................... Aceria cerastii (Nalepa, 1892)