Typhloseiulus peculiaris ( Kolodochka, 1980 )

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 : 49

Typhloseiulus peculiaris ( Kolodochka, 1980)

For other names and synonyms see Demite et al. (2021)

( Fig. 9 : A–D)

Female– Three specimens measured.

Idiosomal setal pattern: 12A:9B/JV–3:ZV.

Dorsal idiosoma ( Fig. 9A ) – Dorsal shield heavily sclerotized and reticulated 360 (350–370) long and 217 (200–223) wide at j 6 level, with 21 pairs of dorsal setae (r 3 and R 1 included); dorsal shield setae strong, thick and serrate, except for j 4, j 5, j 6 and z 5 shorter and smooth; lengths j 1 29 (24–33), j 3 36 (32–40), j 4 12 (10–15), j 5 8 (7– 9), j 6 20 (17–23), J 2 71 (68–73), J 5 9 (8–10), z 2 33 (32–35), z 3 44 (40–47), z 4 47 (44–49), z 5 9 (8–10), Z 1 61 (58–63), Z 4 86 (82–89), Z 5 91 (88–92), s 4 53 (47–58), s 6 63 (58– 68), S 2 68 (65–72), S 4 79 (73–84), S 5 14 (10–19), setae r 3 41 (35–44) and R 1 11 (10–13) on lateral integument; solenostomes and poroids are not visible.

Peritreme – Extending to the level of setae j 1 and striated ( Fig. 9A ).

Ventral idiosoma ( Fig. 9B ) – Sternal shield wider than long, posterior margin straight, smooth, 53 (48–58) long, 63 wide at level of setae ST 2, two pairs of setae and one pair of pores (iv 1), ST 1 32–33, ST 2 32; distances between ST 1 –ST 2 34 (32–35), ST 1 –ST 1 46 (45–46) and ST 2 –ST 2 59 (57–60); ST 3 28–32 and iv 2 on a small platelet, metasternal setae ST 4 30– 33 and a pair of pores (iv 3) on small platelets; genital shield smooth, width at widest point 63 (60–65), ST 5 25–28; two pairs of narrow metapodal shields, primary 44 (41–47) long and accessory 8–13 long; ventrianal shield subrectangular ( Fig. 9B ), reticulated anterior to anus, length 87 (87–88), width at level of paranal setae 64 (63–65); with one pair of preanal setae (JV 2 16–20); six pairs of setae surrounding ventrianal shield on integument (JV 1 20–22, JV 4 11–15, JV 5 32 (27–35), ZV 1 16–19, ZV 2 15–16, ZV 3 8–10), five pairs of pores and one pair of small platelets surrounding ventrianal shield. Ventrianal shield with no pores.

Spermatheca – Calyx saccular 20–24 long, 5–6 in diameter at the middle part of the calyx; atrium inserted at base of the calyx ( Fig. 9C ).

Chelicera – Due to the closed digits, dentation cannot be seen.

Legs – Leg IV ( Fig. 9D ) with one relatively short and thick macroseta, StIV 25 (24–25); legs I, II and III with no recognizable macrosetae; length of legs from the base of coxae to the tip of claws: leg I 297 (280–315), leg II 267 (250–283), leg III 258 (245–270), leg IV 335 (320–350); 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 (1-2/1, 2/0-1) 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 – Greece, Iran, Moldova, The Netherlands (this study) and Turkey.

Specimen examined – Three females, 27 June 2017, 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. The Dutch specimens resemble that of the original description and re-description by Faraji et al. (2007), except seta j 6 is rather longer in the Dutch specimens: 17–23 vs 13 ( Iran) and 12 ( Moldova).

Figures

Figure 9. Typhloseiulus peculiaris (Kolodochka) (Female): (A) Idiosoma, dorsal view; (B) Idiosoma, ventral view; (C) Spermatheca; (D) Leg IV.