Schizogyniidae

Trach, Viacheslav A. & Seeman, Owen D., 2014, A new genus and species of Schizogyniidae (Acari: Mesostigmata) associated with carabid beetles (Coleoptera: Carabidae) from Ukraine, Zootaxa 3793 (2), pp. 247-256 : 254

Key to the world genera of the family Schizogyniidae (adult females)

1. Anal shield free from ventral shield...................................................................... 2

- Anal shield fused with ventral shield..................................................................... 4

2. Latigynal shields free............................................................... Mixogynium Ryke, 1957

- Latigynal shields fused with ventral shield.................................................................. 3

3. Metasternal shields fused with sternal shield; most submarginal and central setae on dorsal shield absent; anal shield wide (as wide as sternal shield)............................................................. Indogynium Sellnick, 1954

- Metasternal shields fused, but free from sternal shield; dorsal shield setae well developed, hypertrichous; anal shield round and small (at most 0.5 times as wide as sternal shield)......................................... Choriarchus Kinn, 1966

4. Large pre-anal membranous region present; metasternal shields fused with sternal shield; dorsal shield hypotrichous..................................................................................... Euroschizogynium gen. nov.

- Pre-anal membranous region absent; metasternal shield (shields) free from sternal shield; chaetotaxy of the dorsal shield nor- mal................................................................................................ 5

5. Metasternal shields fused, broadest medially.............................. Paraschizogynium Hunter & Rosario, 1987 Metasternal shields free......................................................... Schizogynium Trägårdh, 1950