Neoseiulus reductus (Wainstein)

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

Neoseiulus reductus (Wainstein)

Amblyseius reductus Wainstein, 1962: 143 .

( Figure 2)

Material examined — One female was collected from blackberry ( Rubus sp. ), in De Haan, Belgium (51°16′51.7″N, 3°02′52.5″E), 9 January 2022, collector D. Vangansbeke. A second female was collected from blackberry ( Rubus sp. ), in Oostende, Belgium, (51°13′28.1″N, 2°55′36.9″E), 2 February 2022, collector D. Vangansbeke.

Re-description — Female (n = 2) – Dorsum ( Figure 2a). Dorsal shield smooth with five pairs of solenostomes (gd1, gd2, gd6, gd8 and gd9). Length of dorsal shield 320–331, width

(at level of s4) 167–174, width (at level of S2) 187–190. Dorsal setae smooth except Z4 and Z5 slightly serrated; measurements of setae as follows: j1 20–22, j3 30–34, j4 19–21, j5 17–19, j6

23, J2 25–26, J5 10–11, z2 30–33, z4 34–38, z5 19–22, Z1 26–30, Z4 48–51, Z5 65, s4 45 –46, S2 43, S4 32 –34, S5 31 –32, r3 28–30, R 1 21–23. Peritreme extending between setae j3–z2.

Venter ( Figure 2b). Sternal shield striated with some faint patches of reticulations. Distances between (st1–st3) 62–64, st2–st2 62–63. Genital shield faintly reticulated, width at level of setae st5 54–59. Ventrianal shield pentagonal, preanal area striated, postanal area reticulated; with three pairs of preanal setae and one pair of large crescentic pores gv (3), distance between pre-anal pores 16–18. Length of ventrianal shield 110–112, width at level of setae ZV2 80–82, width at level of paranal setae 68–72. Setae ZV1, ZV3, JV4 and JV5 integument surrounding ventrianal shield. Setae JV5 smooth 35–40 in length.

Chelicera ( Figure 2c). Fixed digit of chelicerae with six teeth; movable digit with one tooth.

Spermatheca ( Figure 2d). Calyx of spermatheca saccular, elongated, flaring distally 17–18

in length. Atrium nodular attached to the calyx with very short neck. Major duct long; minor duct well-developed.

Legs. GeII, GeIII and GeIV with eight, seven and seven setae, respectively. Leg IV with three macrosetae. Measurements of macrosetae as follows: SgeIV 25–26, StiIV 24–25 and StIV 38–40.

Remarks — Neoseiulus reductus 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 ( Wainstein 1962 ; Kolodochka, 1978 ; Miedema 1987 ; Cakar et al. 2020 ; Inak et al. 2020). However, as opposed to the aforementioned descriptions, sternal shield striated with some faint patches of reticulations and genital shield reticulated in Belgian specimens.