Typhlodromus (Anthoseius) rhenanoides Athias-Henriot, 1960

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 : 1078-1079

Typhlodromus (Anthoseius) rhenanoides Athias-Henriot

Typhlodromus rhenanoides Athias-Henriot, 1960: 85 .

( Figure 5)

Material examined — Ten females and two males from cherry laurel, Prunus laurocerasus

L. ( Rosaceae ) in Ghent, Belgium, (51°03′04.4″N, 3°45′16.9″E), 27 September 2021, collector D. Vangansbeke.

Re-description — Female (n = 10) – Dorsum ( Figure 5a, b, c). Dorsal shield reticulated with five pairs of solenostomes (gd2, gd4, gd6, gd8 and gd9). Length of dorsal shield 348 (340–355), width (at level of s4) 185 (180–188), width (at level of S2) 192 (190–195). Dorsal setae smooth except Z4 and Z5 slightly serrated; measurements of setae as follows: j1 28

(26–31), j3 31 (27–35), j4 16 (15–18), j5 18 (15–19), j6 21 (20–24), J2 25 (22–27), J5 10

(9–11), z2 18 (17–21), z3 26 (25–30), z4 25 (23–28), z5 17 (15–19), Z4 46 (44–49), Z5 69 (63–76), s4 30 (29–33), s6 33 (30–37), S238 (35–41), S440 (37–44), S522 (18–27), r3 28 (25–30), R 1 29 (27–30). Peritreme extending to almost base of setae j1.

Venter ( Figure 5d). All ventral shields smooth. Distances between st1 (– st2) 37 (35–38),

st2–st2 58 (58–60), st5–st5 63 (60–65). Ventrianal shield pentagonal with three pairs of preanal setae and one pair of rounded solenostomes gv (3), distance between pre-anal pores 37 (35–38). Length of ventrianal shield 109 (108–110), width at level of setae ZV2 103 (103–105). Setae

ZV1, ZV3, JV4 and JV5 integument surrounding ventrianal shield. Setae JV5 smooth 60 (55–66)

in length.

Chelicera ( Figure 5e). Fixed digit with four teeth and pilus dentilis; movable digit with two teeth.

Spermatheca ( Figure 5f). Calyx saccular or tubular, flaring distally, 22 (20–23) in length; atrium nodular attached to calyx without neck. Major duct as wide as atrium, minor duct visible.

Legs. GeII, GeIII and GeIV each with seven setae. Leg IV with three macrosetae, all knobbed apically. Measurements of macrosetae as follows; SgeIV 26 (24–28), StiIV 33 (32–34) and StIV 64 (62–65).

Male (n = 2) – Similar to female in many aspects. Dorsum. Setae r3 and R 1 on shield. Dorsal shield reticulated, with five pairs of solenostomes gd (2, gd4, gd6, gd8 and gd9). Length of dorsal shield 270–288, width (at level of s4) 145–160, width (at level of S2) 150–155. Dorsal setae smooth, except Z5 slightly serrated. Measurements of dorsal setae as follows: j1 20–23,

j3 25–28, j4 13–15, j5 13–15, j6 15–18, J2 18, J5 8, z2 15–18, z3 18–20, z4 18–20, z5 13, Z4 38–40, Z5 48–50, s4 20 –25, s6 23 –25, S2 25 –28, S4 25 –28, S5 15 –18, r3 18–20 and R 1 18. Peritreme extending to level of setae between setae j3–z2.

Venter. Sternogenital shield smooth. Ventrianal shield triangular, reticulated, with four pairs of pre-anal setae (JV1, JV2, JV3, and ZV2); with one pair of small rounded solenostomes (gv3) between setae JV3. Length of ventrianal shield 105–108, width (at anterior corners, widest point) 153–155. Setae JV5 smooth, much longer than other ventral setae (25–28).

Chelicera. Fixed digit with four teeth and pilus dentilis; movable digit with one tooth, spermatophoral process L-shaped, foot 25–28 in length, with toe slightly developed.

Legs. Genua II, III, and IV each with seven setae. Leg IV with three knobbed macrosetae, SgeIV 18, StiIV 18–20 and StIV 45–48.

Remarks — Typhlodromus (Anthoseius) rhenanoides is a new record for the Belgian fauna. Morphological characters including the presence of preanal pores and measurements of the current specimens are very close to those of the original description and re-descriptions ( Athias-Henriot 1960 ; Schuster and Pritchard 1963 ; Papadoulis et al. 2009 ; Ferragut et al. 2010). However, as oppose to the all previous descriptions, three knobbed macrosetae on leg IV are present in the Belgian material, as previously mentioned by Faraji et al. (2011b) based on the specimens collected from France.