Key to genera of Oribatellidae

1. Rostral setae spinose. Tutorium without cusp (Bernini 1983, Fig. 2), not extending anterior of rostral seta...... Siciliotrichus

- Rostral seta setose with large barbs. Tutorium with cusp, extending anterior of rostral seta........................... 2

2(1) Interlamellar pocket large, box-like, reaching posterior of dorsosejugal scissure. Medial longitudinal ridge on coxisternum present.................................................................................... Ferolocella

- Interlamellar pocket present or absent, if present, never large, box-like, never reaching posterior of dorsosejugal scissure. Medial longitudinal ridge on coxisternum absent............................................................. 3

3(2) Notogastral setae lm positioned lateral to porose area Aa and lp positioned lateral to A1 (Behan-Pelletier 2013 Fig. 10). Dentes of lamellar cusps short and broadly tapered..................................................... Ophidiotrichus

- Notogastral setae lm positioned medial or posterior to porose area Aa and lp positioned lateral or anterior to A1. Dentes of lamellar cusps long and sharply tapered................................................................... 4

4(3) Lamellar cusp with ventral keel (Behan-Pelletier 2013 Fig. 2F). Translamella without tooth...................... Joelia

- Lamellar cusp without ventral keel. Translamella with or without tooth........................................... 5

5(4) Notogastral cavities present (Bernini 1975 Fig. 16b). Custodium absent................................... Fberninia

- Notogastral cavities absent. Custodium present.............................................................. 6

6(5) Anterior margin of notogaster distinctly undulating with 5 or more fine ridges lateral of bothridium (Behan-Pelletier 2011 Fig. 20A). Pouch-like depression positioned ventrally between pedotectum I and the lateral body wall absent. Epimeral setae 1c and 4c present................................................................................ Oribatella

- Anterior margin of notogaster weakly undulating with no ridges lateral of bothridium. Pouch-like depression positioned ventrally between pedotectum I and the lateral body wall present (Fig. 3, 16). Epimeral seta 1c present or absent, 4c absent.............................................................................................. Fenestrobates