Paraseiulus triporus (Chant & Yoshida-Shaul)

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 : 1076-1078

Paraseiulus triporus (Chant & Yoshida-Shaul)

Typhlodromus triporus Chant & Yoshida-Shaul, 1982: 3029 .

( Figure 4)

Material examined — One female from black alder ( Alnus glutinosa (L.) Gaertn., Betulaceae ), 27 November 2021, in Ghent, Belgium (51°02′44.4″N, 3°44′47.4″E). Three females from blackberry ( Rubus sp. , Rosaceae ), 22 January 2022, in Ghent, Belgium, (51°02′43.7″N, 3°44′59.7″E). One female from blackberry plant ( Rubus sp. , Rosaceae ), 19 February 2022, in Merelbeke, Belgium, (51°00′54.9″N, 3°44′34.4″E), collector D. Vangansbeke.

Re-description — Female (n = 5) – Dorsum ( Figure 4a, b, c). Dorsal shield strongly reticulated with three pairs of solenostomes gd (2, gd6 and gd9). Length of dorsal shield 372 (370–375), width (at level of s4) 179 (172–184), width (at level of S2) 206 (200–214). Dorsal setae smooth except Z5 slightly serrated; measurements of setae as follows: j1 19 (17–21), j3

27 (24–31), j4 20 (19–21), j5 20 (19–21), j6 27 (23–30), J2 29 (28–30), J5 12 (11–13), z2 32 (31–32), z4 36 (35–36), z5 21 (18–26), z6 25 (22–27), Z4 31 (28–34), Z5 46 (45–48), s4 37

(32–42), s6 38 (35–41), S240 (38–41), S432 (30–33), S534 (33–34), r3 33 (32–33), R 1 29

(27–32). Peritreme extending between setae j1–j3.

Venter. Sternal and genital shields smooth, ventrianal shield striated. Distances between (st1–st2) 48 (46–52), st2–st2 61 (58–63), st5–st5 64 (61–66). Ventrianal shield elongated two pairs of preanal setae without preanal pores. Length of ventrianal shield 121 (119–123), width at level of setae ZV2 51 (47–56), width at level of paranal setae 62 (57–69). Setae ZV1, ZV3,

JV4 and JV5 integument surrounding ventrianal shield. Setae JV5 smooth 39 (36–41) in length.

Chelicera ( Figure 4d). Fixed digit of chelicera with four teeth and pilus dentilis; movable digit with one tooth.

Spermatheca ( Figure 4e). Calyx of spermatheca bell-shaped, progressively narrowing where it joins c-shaped atrium, base weakly sclerotized.

Legs. GeII, GeIII and GeIV with eight, seven and seven setae, respectively. Leg IV with one macroseta, StIV 30 (28–34).

Remarks — Paraseiulus triporus 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 ( Chant and Yoshida-Shaul 1982 ; Miedema 1987 ; Faraji et al.

2007; Ferragut et al. 2010 ; Papadoulis et al. 2009).