Onchodellus alpinus (Willmann, 1953) Diagnosis Female with dorsal shield middle-sized, 580 long, 420 wide (length/width ratio: 1.38), oval, wellreticulated. Dorsal shield setae J1–2 65, J3–4 68, J5 33 long (J4 / J5 ratio: 2.06). Posterolateral margins of dorsal shield with one pair of slit-shaped gland pores (gdS4) close to seta S4, glands gdZ1 circular. Sternal shield 164 long, 100 wide (length/width ratio: 1.64), well reticulated. Genitiventral shield 200 long, 216 wide (length/width ratio: 0.92), reticulate-lineate. Anal shield subtriangular, smooth, 64 long, 100 wide (length/width ratio: 0.64). Soft lateral and opisthogastric integument bearing 12 pairs of smooth setae. Tarsus II with one spur-like distal seta. Sperm access system with a spermathecal tube long and sac-like basally. Material examined – 1 female, Saravan forest, from soil under pine tree, 14 June 2016. Distribution and habitats in Iran – This species was firstly recorded in honey bee hives from Tehran province (Region not mentioned) (Rahmani et al. 2006). World distribution – European countries (e.g. Central Europe, Alps area, Austria, Finland and Slovakia) (Karg 1993; Mašán 2007; Mašán and Mihál 2009; Mašán and Halliday 2014a; Huhta 2016). Note – This is the first record of this species in Guilan province.

Published as part of Mojahed, Samaneh, Hajizadeh, Jalil, Hosseini, Reza & Ahadiyat, Ali, 2017, Contribution to the Pachylaelapidae (Acari: Mesostigmata) fauna in some parts of Guilan province of Iran, pp. 269-285 in Persian Journal of Acarology 6 (4) on page 273, DOI: 10.22073/pja.v6i4.29712, http://zenodo.org/record/7174046