27. P. wescolagricus Corbett 1983

(present study) 9♀: L= 578.8 (463.5–646.5) µm; a = 31.9 (29.3–35.7); b = 5.6 (4.8–6.5); b' = 4.4 (3.8–4.8); c = 19.7 (16.2–23.8); c' = 2.5 (2.2–2.9); St = 17.4 (16.5–19) µm; V = 78.7 (73.5–82.2); V´ = 82.2 (77.3–87.3)

Associated plant and locality. Ziziphus zizyphus (South Khorasan).

Reference. Present study.

Remarks. The Iranian population of P. wescolagricus closely corresponds to the original description (Corbett 1983). It is characterized by having a rounded lip region with four annuli, lateral fields with four lines, outer ones being areolated, nonfunctional spermatheca, and subhemispherical tail with rounded smooth (occasionally indented) tip.