Pachyseius humeralis Berlese, 1910

Murvanidze, Maka, Mumladze, Levan & Todria, Nino, 2019, A contribution to the knowledge of oribatid and mesostigmatic mites (Acari) with new records in Georgia, Persian Journal of Acarology 8 (4), pp. 309-325: 318-319

publication ID 10.22073/pja.v8i4.51419

persistent identifier

treatment provided by


scientific name

Pachyseius humeralis Berlese, 1910


Pachyseius humeralis Berlese, 1910  

Diagnostic characters (female) – Measurements: 745 × 370 μm; tectum straight, dentate; dorsal shield with parallel margins, setae simple, J1-J5 40μm, Z1-Z5 and S2-S4 65 μm; sternal plate with three pairs of setae 30 μm; one pair of genital setae 40 μm; ventrianal plate 300 × 235 μm, with three pairs of setae 50 μm; metapodal shields long, narrow, 85 μm. Four species of genus other than P. humeralis   have three pairs of ventrianal setae: P. pachylaelapoides Mašan & Mihal, 2007   , P. cicacki Mašan & Mihal, 2007   , P. iraola Moraza, 1993   and P. wideventris Afifi & Nasr, 1984   ( Mašan and Mihal 2007). Pachyseius humeralis   differs from them by weakly sclerotized presternal shields connected to the sternal shield, oblong (longer than wide) ventrianal plate and metapodal shields well separated from the lateral margins of ventri-anal plate.

Material – Javakheti highland (N 41.31952703, E 43.76917047, 2143m a.s.l.) soil from artificial pine forest, one female, coll. Mumladze, L., 31.08.2018.; Javakheti highland (N 41.348734, E 43.695654, 2113m a.s.l.), soil from artificial maple ( Acer   sp.) plantation, one female, coll. Mumladze, L., 31.08.2018; Javakheti highland (N 41.35541628, E 43.69839602, 2311m a.s.l.), soil from artificial pine forest, two females, coll. Mumladze, L., 31.08.2018.

Distribution in Caucasus – New for Caucasus.

Global distribution – Palaearctic ( Mašan and Halliday 2013).

Habitats – Grasslands, broad leaved and coniferous forests, limestone soils, decaying organic material and humus ( Karg 1993).