Acrotritia ardua (C. L. Koch, 1841) (Fig. 13A–F) Measurements of one of specimens from sample: South–West Province, Mt. Koup Ecological Reserve, Mt. Koup at Nyasoso, 19–21.V.2006, about 6 km N of Loum, latitude 04°49'09.18"N, longitude 09°42'27.18"E, altitude 1550m, foggy submontane forest, litter and soil sifting sample, leg V. Grebennikov, prodorsum: length 293, width 217, height 101; prodorsal setae: sensillus 97, interlamellar (in) 106, lamellar (le) 81, rostral (ro) 56, exobothridial (ex) 10; notogaster: length 596, width 515, height 444; notogastral setae: c 1 101, c 1/ c 1 -d 1=0.74. Remarks. Specimens from this sample have monodactylous tarsi IV. This common species normally have heterotridactylous tarsi IV.

Published as part of Niedbała, Wojciech & Starý, Josef, 2014, New and little known species of ptyctimous mites (Acari, Oribatida) from Cameroon, pp. 31-57 in Zootaxa 3889 (1) on page 55, DOI: 10.11646/zootaxa.3889.1.2, http://zenodo.org/record/228762