Kampimodromus corylosus Kolodochka, 2003

K, Ismail Döker, VangansbekeK, Dominiek & K, Jonas Merckx, 2022, New records of phytoseiid mites (Acari: Mesostigmata: Phytoseiidae) in Belgium with an identification key to Belgian species, Acarologia 62 (4), pp. 1070-1083 : 1073-1076

Kampimodromus corylosus Kolodochka

Kampimodromus corylosus Kolodochka, 2003: 51 .

( Figure 3)

Material examined — One female (11 January 2022) and four females (30 January

2022) from common hazel Corylus avellana L. ( Betulaceae ) in Gent, Belgium, (51°02′44.5″N, 3°44′47.6″E), collector D. Vangansbeke.

Re-description — Female (n = 5) – Dorsum ( Figure 3a). Dorsal shield reticulated with five pairs of solenostomes (gd1, gd2, gd6, gd8 and gd9). Length of dorsal shield 296 (293–298), width (at level of s4) 170 (166–172), width (at level of S2) 170 (164–174). Dorsal setae serrated except j4, j5, j6, J2, Z1 smooth; measurements of setae as follows: j1 17 (16–17), j3 21 (21–22),

j4 16 (16–17), j5 14 (13–14), j6 17 (16–18), J2 21 (17–23), J5 8 (7–9), z2 25 (24–26), z4 32 (31–33), z5 18 (17–18), Z1 20 (19–21), Z4 38 (37–39), Z5 48 (46–49), s4 39 (35–41), S242 (40–45), S5 18 (18–19), r3 38 (36–40), R 1 25 (24–26). Peritreme extending between setae j3–z2.

Venter. All ventral shields smooth except ventrianal shield with some faint striations posterior to setae JV2. Distances between (st1–st3) 63 (61–65), st2–st2 57 (56–58), st5–st5

48 (46–49). Ventrianal shield elongated with three pairs of preanal setae and one pair of large crescentic solenostomes (gv3), distance between pre-anal pores 15 (12–16). Length of ventrianal shield 96 (94–100), width at level of setae ZV2 50 (48–52), width at level of paranal setae 48 (48–49). Setae ZV1, ZV3, JV4 and JV5 integument surrounding ventrianal shield. Setae JV5 serrated 32 (29–34) in length.

Chelicera ( Figure 3b). Fixed digit of chelicerae with three teeth; movable digit smooth.

Spermatheca ( Figure 3c). Calyx of spermatheca cup-shaped, flaring distally 9 (8–10) in length. Atrium nodular attached to calyx without neck. Major duct long; minor duct developed.

Legs. GeII, GeIII and GeIV eight, seven and eight setae, respectively. Leg IV with two macrosetae both with two barbs and blunt or slightly knobbed tip. Macrosetae basitarsus IV 22 (20–23) and telotarsus IV 21 (20–22) in length.

Remarks — Kampimodromus corylosus is a new record for the Belgian fauna. Morphological characters and measurements of the current specimens are very close to those of the original description and re-descriptions ( Kolodochka 2003 ; Tixier et al. 2008 ; Cargnus et al. 2012). Similar to the Belgian material, Kolodochka (2003) described macroseta on basitarsus

IV with two barbs. We here recognized and illustrated an additional macroseta on telotarsus which have also two barbs, and blunt tip. Therefore, the presence or absence of modified macrosetae on legs, as an additional diagnostic character, should also be investigated in other species in this genus.