Proctolaelaps sibiriensis ( Davydova, 1988 )

Trach, Viacheslav A., Marchenko, Irina I. & Joharchi, Omid, 2019, Redescription of the female of bumblebee-associated gamasid mite Proctolaelaps sibiriensis (Davydova, 1988) (Acari: Mesostigmata: Melicharidae) from North Asia, Acarologia 59 (4), pp. 531-541 : 532

Proctolaelaps sibiriensis ( Davydova, 1988)

( Figs 1–4 , 5A, B )

Material examined — Holotype female, Russia, Novosibirsk, arboretum, 55°05ʹN,

82°51ʹE, from nest of Bombus hypnorum, 1984 , N. R. Bogatyrev coll. ; two females, same

data; four females, same geographical data, from nest of Bombus agrorum , 22 July 1985, N. R .

Bogatyrev coll.; three females, same geographical data, from nest Bombus of hypnorum , 10 and

16 July 1987, N. R. Bogatyrev coll. ; two females, Russia, Tyumen Province, Nizhnetavdinsky

Region, vicinity of lake Kuchak, 57°21ʹN, 66°03ʹE, from Bombus sp. , 27 April 2018, O.

Joharchi coll.

Diagnosis — Dorsal shield with complex volumetric shape, harshly sclerotized with

distinct reticulate ornamentation over whole surface except more poorly sclerotized regions

in anterior extension and posterior; with 43 pairs of setae; dorsal setae simple, needle-like,

except spindle-like setae j1 and serrated setae Z5. Pre-sternal area transversely lineate, without

platelets. Sternal shield completely reticulated except posteriorly where overlapped by hyaline

flap of epigynal shield, with group of small rounded cells in centre of shield. Poroids iv3 absent.

Anterior membranous margin of epigynal shield subtriangular, elongate; posterior margin of

shield slightly rounded; shield reticulated. Three pairs of postgenital platelets present. Anal

shield subquadrate; reticulated; anus small, located in centre of shield. Soft opisthogastric

cuticle with 11 pairs of setae. Epistome subtriangular with small blunt process distally and

undulated laterally. Deutosternum with seven rows of denticles, rows 1–6 connected th, 7 row

free; rows with two lateral and 1–2 medial denticles. Corniculi with paraxial process. Fixed

cheliceral digit with apical hook, two teeth on cutting surface and one small tooth on median

line; subapical tooth with well-expressed membranous lobe instead of pilus dentilis. Movable

digit with apical hook and one small tooth on cutting surface. Leg chaetotaxy formulae normal

for genus, including tibia III with 9 setae; most leg setae thickened and born on small tubercles.

Figures

Figure 1 Proctolaelaps sibiriensis(Davydova, 1988), female: idiosoma, dorsal view. Scale bar: 100 μm.

Figure 2 Proctolaelaps sibiriensis(Davydova, 1988), female: idiosoma, ventral view. Scale bar: 100 μm.

Figure 3 Proctolaelaps sibiriensis(Davydova, 1988), female: A – epistome; B – subcapitulum and palp (from trochanter to genu), ventral

Figure 4 Proctolaelaps sibiriensis(Davydova, 1988), female: A – leg I, ventral view; B – leg II, ventral view; C – leg III, ventral view; D – leg IV, ventral view. Scale bar: 100 μm.

Figure 5 Micrographs ofProctolaelapsspp., females: A – Proctolaelaps sibiriensis(Davydova, 1988), dorsal view; B – Proctolaelaps sibiriensis (Davydova, 1988), ventral view; C – Proctolaelaps ornatus(Postner, 1963), dorsal view; D – Proctolaelaps ornatus(Postner, 1963), ventral view. Scale bar: 100 μm.