Acrotritia ardua (C. L. Koch, 1841)

Niedbała, W., 2017, Ptyctimous mites (Acari, Oribatida) of Madagascar and neighbouring islands, Acarologia 57 (1), pp. 3-205 : 44-48

Acrotritia ardua

(C.L. Koch, 1841) ( Figure 27 )

Rhysotritia ardua: Niedbała 1998a ,b, 2001

Diagnosis — Prodorsum 261, notogaster 572 (specimen from MAG-280).

Medium-sized species; colour light brown, brown. Prodorsum with one pair of lateral carinae; sensilli with distinctly dilated head covered with spines; dorsal setae rigid, erect, with small spines in distal half, exobothridial setae minute; in> le> ro> ex. Notogastral setae fairly short (c 1 <c 1 -d 1) covered with small spines in distal half, setae of row c remote from anterior border, setae c 2 more, setae c 3 less remote; distance between setae ps 2 and ps 3 is considerably bigger than between setae ps 1 and ps 2 (in specimen from Madagascar ps 2 - ps 3 / ps 1 - ps 2 =2.5). Ventral region; 9 pairs of minute genital setae, 2 pairs of aggenital setae, arranged longitudinally, similar in length to genital setae. Chaetome of legs: I: 1-3-5(2)-4(1)-17(3), II: 1-3-3(1)-4(1)-13(2), III: 2-2-2(1)-3(1)-11, IV: 2-1-2-2(1)-10; tarsi of the legs I bidactylous, tarsi II-IV heterotridactylous.

Localities in Madagascar (eastern part) and Comoros: Niedbała 2001.

Distribution — Semicosmopolitan.

Figures

FIGURE 27: Acrotritia ardua (C.L. Koch, 1841) (specimen from Finland): A – prodorsum, dorsal view; B – prodorsum, lateral view; C – opisthosoma, lateral view; D – subcapitulum; E – ventral region.