Kampimodromus langei Wainstein & Arutunjan, 1973

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 : 36-39

Kampimodromus langei Wainstein & Arutunjan, 1973

Kampimodromus coryli Meshkov, 1999: 428 , new synonym

( Fig. 2 : A–E)

Female – Six specimens measured.

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

Dorsal idiosoma ( Fig. 2A ) – Dorsal shield 308 (303– 317) long and 165 (163–168) wide at j 6 level, oval with waist at R1 setae, sclerotized, lightly sculptured with irregular ornamentation; with 18 pairs of dorsal setae (r 3 and R 1 included); dorsal shield setae serrated, except for j 4, j 5, j 6, J 2 J 5 , z 5 and Z 1 slightly serrated; lengths: j 1 20 (19–20), j 3 29 (28–31), j 4 14, j 5 13 (13–14), j 6 15 (14–16), J 2 23 (22–24), J 5 7 (6–7), z 2 29 (27–30), z 4 33 (32–33), z 5 14 (13–14), Z 1 19 (18–21), Z 4 44 (43–45), Z 5 51 (48–52), s 4 37 (36–38), S 2 40 (39–41), S 5 21 (19–23); setae r 3 36 (36–37) and R 1 28 (27–30) on lateral integument are serrated; dorsal shield with 5 pairs of solenostomes (gd 1, gd 2, gd 6, gd 8, gd 9), gd 2 the largest, gd 9 almost attached to the base of S 5 and 12 pairs of small poroids.

Peritreme – Extending to level of setae z 2 or between z

2 and j 3 ( Fig. 2A ).

Ventral idiosoma ( Fig. 2B ) – Width and length of sternal shield subequal and smooth, posterior margin slightly concave, irregular, 58 (55–60) long, 61 (60–62) wide at level of setae ST 2, three pairs of setae and two pairs of pores (iv 1 and iv 2), ST 1 27–28, ST 2 25–26, ST 3 25–26; distances between ST 1 –ST 3 58 (57–58) and ST 1 – ST 1 43 (41–46), ST 2 –ST 2 54 (53–55); metasternal setae ST 4 25–27 and a pair of pores (iv 3) on small platelets; genital shield smooth width at widest point 50 (49–50), ST

5

23– 24; two pairs of narrow metapodal shields, primary 25 (24–27) long and accessory 9–10 long; ventrianal shield elongate, narrower at the middle part ( Fig. 2B ), with a few horizontal striae, length 91 (87–94), width at level of setae ZV 2, 53 (52–54), and width at level of paranal setae 51 (50–51); with three pairs of preanal setae (JV 1 17–20, JV 2 16–19, ZV 2 16–20); four pairs of setae surrounding ventrianal shield on integument (JV 4 13–17, JV 5 28 (27– 30), ZV 1 19–21, ZV 3 12), five pairs of pores and one pair of small platelets surrounding ventrianal shield. Ventrianal shield with a pair of small round pores (gv 3), posteriad to JV 2, distance between these pores 23 (21–24).

Spermatheca – Calyx cup-shaped 4–5 long, 10–11 in diameter of the calyx; atrium nodular c-shaped ( Fig. 2C ).

Chelicera – Fixed digit 24–25 long with two apical teeth (apical hook is not considered) and a pilus dentilis; movable digit 25–26 long with 1 tooth ( Fig. 2D ).

Legs – Leg IV ( Fig. 2E ) with one short macroseta, StIV 18 with a dull tip; legs I, II and III with no recognizable macrosetae; length of legs from the base of coxae to the tip of claws: leg I 264 (260–268), leg II 217 (212–220), leg III 205 (200–210), leg IV 268 (266–270); 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) – 8 (1-2/1, 2/0-2) and 10 (2-2/1, 2/1-2) – 7 (1-1/1, 2/1-1) – 7 (1-1/1, 2/1-1) – 7 (1-1/1, 2/0-2) setae respectively.

Distribution – Armenia, Croatia, Italy, Moldova, Norway, Russia and The Netherlands (this study).

Specimens examined – Nine females, 25 September 2018, in erinea caused by the mite Aceria cerrea on a Quercus cerris ( Turkey Oak), Bos der Onverzettelijken, Almere, Flevoland, Netherlands (52°23’11.0” N 5°14’30.1” E), collector: Paul Hoekstra.

Remarks – This is a new species record for Dutch fauna. All the morphological features of the Dutch specimens fit well with those described by Wainstein & Arutunjan (1973). Meshkov (1999) described K. coryli , which is very similar to K. langei based on the shape of StIV and the length of peritreme: having macroseta with pointed tip and the peritreme extending to j 3 –z 2 for K. coryli and having macroseta with knobbed tip and the peritreme extending to z 2 for K. langei . Despite Tixier et al. (2008) suspicion for synonymy, Döker et al. (2017) used these two characters in their key to separate these two species. As our data shows, the tip of StIV has a dull tip, a feature in between pointed and knobbed as well as the peritreme extending either to z 2 or j 3 –z 2. Therefore, as Tixier et al. (2008) suggested, we consider these two differences as intraspecific variation, and recognize them as conspecifics with K. coryli as a junior synonym of K. langei .

Figures

Figure 2. Kampimodromus langei Wainstein & Arutunjan (Female): (A) Idiosoma, dorsal view; (B) Idiosoma, ventral view; (C) Spermathecae; (D) Chelicera; (E) Leg IV.