Proprioseiopsis gallus Karg, 1989

Faraji, Farid & Hoekstra, Paul H., 2021, Some new species records of the predatory mite family Phytoseiidae (Acari: Mesostigmata) from The Netherlands, Soil Organisms 93 (1), pp. 35-57 : 43

Proprioseiopsis gallus Karg, 1989

( Fig. 5 : A–E)

Female– Five specimens measured.

Idiosomal setal pattern: 10A:8E/JV–3:ZV.

Dorsal idiosoma ( Fig. 1A ) – Dorsal shield oval and smooth 369 (363–375) long and 283 (273–295) wide at j 6 level, with 18 pairs of dorsal setae (r 3 and R 1 included); dorsal shield setae smooth, except for Z 4 and Z 5, slightly serrated; lengths: j 1 32 (30–33), j 3 48 (46–51), j 4, j 5, j 6, z 5 & Z 1 4–5, J 5 4, z 2 23 (22–24), z 4 7 (6–8), Z 4 147 (142–150), Z 5 165 (161–166), s 4 105 (103–109), S 2 4 –5, S 4 4 –5, S5 8; setae r 3 18 (17–19) and R 1 10 (9–11) on lateral integument; Z 4, Z 5 and s 4 are the longest; dorsal shield with 7 pairs of solenostomes (gd 1, gd 2, gd 4, gd 5, gd 6, gd 8, gd 9) and 12 pairs of small poroids. Setae z 2 about 3 times longer than z 4.

Peritreme – Extending almost beyond setae j 1 ( Fig. 5A ).

Ventral idiosoma ( Fig. 5B ) – Sternal shield wider than long, posterior margin slightly concave, reticulated with fine punctation, 63 (62–63) long, 109 (106–115) wide at level of setae ST 2, three pairs of setae and two pairs of pores (iv 1 and iv 2), ST 1 33, ST 2 33, ST 3 30;distancesbetween ST 1 –ST 3 63 (62–65), ST 1 –ST 1 49 (47–51) and ST 2 –ST 2 70 (69–71); metasternal setae ST 4 29 and a pair of pores (iv 3) on small platelets; genital shield slightly reticulated with fine punctation, width at widest point 109 (106–115), ST 5 32; two pairs of metapodal shields, primary 22 (21–22) long and accessory 7–9 long; ventrianal shield shield-shaped ( Fig. 5B ), reticulated all over with fine punctation, length 127 (125–130), width at level of setae ZV 2, 143 (140–148), and width at level of paranal setae 100 (98– 102); with three pairs of preanal setae (JV 1 33–36, JV 2 38, ZV 2 33); four pairs of setae surrounding ventrianal shield on integument (JV 4 25–26, JV 5 61 (57–63), ZV 1 30, ZV 3 20–21), five pairs of pores and one pair of small platelets surrounding ventrianal shield. Ventrianal shield with a pair of small round pores (gv 3) posteromesad to JV 2, distance between these pores 57 (53–59).

Spermatheca – Calyx saccular 19 (18–19) long, 6–7 in diameter at the middle part of the calyx; atrium U-shaped inserted at base of the calyx ( Fig. 5C ).

Chelicera – Fixed digit 29 long with 11 teeth and a pilus dentilis; movable digit 32 long with 3 teeth ( Fig. 5D ).

Legs – Leg IV ( Fig. 5E ) with three pointed macrosetae, SgeIV 91 (88–93), StiIV 71 (67–73), StIV 63 (59–65); length of macrosetae on other legs: SgeIII 46 (43–49), SgeII 37 (35–38); leg I with no recognizable macrosetae; length of legs from the base of coxae to the tip of claws: leg I 407 (405–408), leg II 310 (295–325), leg III 314 (310–318), leg IV 405 (400–410); chaetotactic formulae of genua and tibiae I–II–III–IV with 10 (2-2/1, 2/1-2) – 8 (2-2/1, 2/0-1) – 7 (1-2/1, 2/0-1) – 7 (1-2/0, 2/1-1) and 10 (2-2/1, 2/1-2) – 7 (1-1/1, 2/1-1) – 7 (1-1/1, 2/1-1) – 6 (1-1/1, 2/0-1) setae respectively.

Distribution – Germany and The Netherlands.

Specimen examined – Five females, 28 July 2010, unidentified weeds from a grassland, Sinderhoeve , near Renkum, The Netherlands (51°59’52.9”N 5°45’15.9”E), collector: Frank Bakker.

Remarks – This is a new species record for Dutch fauna. Among the other morphological characters in the genus Proprioseiopsis , the length of setae z 2 and z 4, and its ratio are very important in identification. Proprioseiopsis gallus can be identified by the ventrianal shield which is wider than long and setae z 2 22–24, z 4 6–8 with ratio 3 to 1. Karg (1989) described P. gallus from Germany. All the features of Dutch collected specimens conform to those of the original description, with the exception of seta JV 5 which is shorter (57–63 vs 90) and the movable digit of the chelicera which has 3 teeth rather than 2. Having 3 or 2 teeth can be considered as a morphological variation or the third teeth could have been overlooked due to the smaller size of the middle tooth. Whether the atrium clearly enters the calyx or not was used by Karg (1993) to separate P. gallus from the closely related species. We think that character creates confusion to separate it from P. jugortus based on our specimen collection.

Figures

Figure 1. Kampimodromus florinensis Papadoulis, Emmanouel & Kapaxidi (Female): (A) Idiosoma, dorsal view; (B) Idiosoma, ventral view; (C) Spermathecae; (D) Chelicera; (E) Ventrianal shield, a variation; (F) Leg IV.

Figure 5. Proprioseiopsis gallus Karg (Female): (A) Idiosoma, dorsal view; (B) Idiosoma, ventral view; (C) Spermathecae; (D) Chelicera; (E) Leg IV.