New flat mite genera (Acari: Trombidiformes: Tenuipalpidae) associated with Australian sedges (Cyperaceae) Author Beard, Jennifer J. Author Ochoa, Ronald text Zootaxa 2011 2941 1 37 journal article 46477 10.5281/zenodo.204686 4d30eb9e-47cf-4408-a9a8-f70b0f8f1add 1175-5326 204686 Key to Tenuipalpidae on Cyperaceae in Australia 1. Dorsal opisthosomal setae c1 , d1 present, setae e1 absent ( Figs 2 , 9 , 12 , 20 ); genua I – IV nude....................... 2 - Dorsal opisthosomal setae c1 absent, setae d1 , e1 present ( Figs 22 – 25 ); genua I – II with setae, genu III with or without setae..................................................................................................... 5 2. Dorsal opisthosomal setae e2 absent, setae e3 , f2 , f3 present ( Figs 2 , 9 ); trochanters I – IV with one seta ( v’ ); anterior margin of prodorsum without projections.................................................. 3 Gahniacarus Beard & Ochoa - Dorsal opisthosomal setae e2 , f3 absent, setae e3 , f2 present ( Figs 12 , 20 ); trochanters I – IV nude (except male tr I with one seta, v’ ); anterior margin of prodorsum with three projections (a pair of conical projections (each bearing setae v2 ) flanking a broad median projection)...................................................... 4 Cyperacarus Beard & Ochoa 3. Prodorsal setae sc1 elongate, obviously longer than most other dorsal setae ( Fig. 9 ); protonymph with dorsal opisthosomal setae e3 minute ( Fig. 11 ).................................................. Gahniacarus gersonus Beard & Ochoa - Prodorsal setae sc1 subequal in length to other dorsal setae ( Fig. 2 ); protonymph with dorsal opisthosomal setae e3 subequal to other dorsal setae, barbed ( Fig. 7 )....................................... Gahniacarus tuberculatus Beard & Ochoa 4. Dorsal opisthosomal setae c1 minute ( Fig. 20 ); lateral dorsal opisthosomal setae broadly rounded distally; prodorsal setae sc2 > 240 μm............................................................... Cyperacarus foliatus Beard & Ochoa - Dorsal opisthosomal setae c1 short, broad, barbed ( Fig. 12 ); lateral dorsal opisthosomal setae tapered distally; prodorsal setae sc2 <220 μm............................................................ Cyperacarus naomae Beard & Ochoa 5. Anterior margin prodorsum smooth, or with a reduced median projection ( Figs 22 , 23 ); genu III nude.............................................................................................. 6 Prolixus Beard, Fan & Walter - Anterior margin prodorsum with elongate, divided median projection ( Figs 24 , 25 ); genu III with one seta ( d )............................................................................................ 7 Acaricis Beard & Gerson 6. Dorsal opisthosomal setae f2 present ( Fig. 22 ); dorsal opisthosomal setae d1 , c3 equal in length, short; dorsum with apparent prodorsal and opisthosomal shields, plicate between sc2–d1....................... Prolixus forsteri Beard, Fan & Walter - Dorsal opisthosomal setae f2 absent ( Fig. 23 ); dorsal opisthosomal setae c3 obviously longer than d1 ; dorsum entirely plicate................................................................... Prolixus corruginus Beard, Fan & Walter 7. Setae sc2 broadly lanceolate, finely barbed, longer than sc1 ( Fig. 24 ); femur III with seta d broadly lanceolate, finely barbed............................................................................ Acaricis plana Beard & Gerson - Setae sc2 short, barbed, equal in length to sc1 ( Fig. 25 ); femur III with seta d short, stout, smooth................................................................................................ Acaricis danutae Beard & Gerson