Typhlodromus (Typhlodromus) baccettii Lombardini, 1960

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 : 51-54

Typhlodromus (Typhlodromus) baccettii Lombardini, 1960

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

( Fig. 12 : A–E)

Female– Six specimens measured.

Idiosomal setal pattern: 10A:7A/JV:ZV.

Dorsal idiosoma ( Fig. 12A ) – Dorsal shield reticulated 331 (325–338) long and 166 (155–178) wide at j 6 level, with 17 pairs of dorsal setae (r 3 and R 1 included); dorsal shield setae smooth, except for Z 5 slightly serrated; lengths j 1 24 (23–25), j 3 27 (25–28), j 4 16 (15–16), j 5 15 (15–16), j 6 18 (17–19), J 2 19 (18–20), J 5 7 (6–7), z 2 16 (15–16), z 3 21 (21–22), z 4 22 (21–22), z 5 17 (16–17), Z 4 30 (29–30), Z 5 49 (47–50), s 4 24 (23–25), s 6 27 (26–27), S 2 29 (28– 29), S 4 31 (30–32), setae r 3 22 (22–23) and R 1 20 (19–21) on lateral integument; dorsal shield with 3 pairs of solenostomes (gd 2, gd 6, gd 9) and 14 pairs small poroids.

Peritreme – Extending to the level of setae j 1 ( Fig. 12A ).

Ventral idiosoma ( Fig. 12B ) – Sternal shield wider than long, smooth, posterior margin slightly concave, irregular, 56 (51–60) long, 65 (64–65) wide at level of setae ST 2, two pairs of setae and two pairs of pores (iv 1 and iv 2), ST 1 26–27, ST 2 26; distances between ST 1 –ST 2 34 (32–35), ST 1 –ST 1 50 (49–51) and ST 2 –ST 2 57 (55–58); metasternal setae ST 3 26 and ST 4 25–26 on small platelets, ST 4 associated with a pair of pores (iv 3); genital shield smooth, width at widest point 73 (70–74), ST 5 24; two pairs of metapodal shields, primary 25 (22–29) long and accessory 11–15 long; ventrianal shield pentagonal ( Fig. 12B ), striated with horizontal lines, length 104 (102–107), width at level of setae ZV 2, 104 (103–105), and width at level of paranal setae 67 (66–67); with four pairs of preanal setae (JV 1 20–21, JV 2 22, JV 3 17–18, ZV 2 19–21); four pairs of setae surrounding ventrianal shield on integument (JV 4 13–14, JV 5 47 (45–50), ZV 1 19–20, ZV 3 12–13), five pairs of pores and one pair of small platelets surrounding ventrianal shield. Ventrianal shield with no pores.

Spermatheca – Calyx cup-shaped 10–11 long, 9–10 in diameter at the middle part of the calyx; atrium large C-shaped on a short stalk ( Fig. 12C ).

Chelicera – Fixed digit 25 long with 3 teeth and a pilus dentilis; movable digit 26 long with 1 tooth ( Fig. 12D ).

Legs – Leg IV with one pointed macroseta ( Fig. 12E ), StIV 45 (44–47); legs I, II and III with no recognizable macrosetae; length of legs from the base of coxae to the tip of claws: leg I 284 (280–288), leg II 251 (250–253), leg III 252 (251–253), leg IV 314 (308–318); chaetotactic formulae of genua and tibiae I–II–III–IV with 10 (2-2/1, 2/1-2) – 7 (2-2/0, 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 (1-2/1, 1/1-1) – 7 (1-2/1, 1/1-1) – 6 (1-1/0, 2/1-1) setae respectively.

Distribution – Australia, France, Italy, Morocco, Norway, Spain and The Netherlands.

Specimen examined – Six females, 04 September 2014, Poplar tree ( Populus alba ), Science park , Amsterdam, The Netherlands (52°21’20.8”N 4°57’34.2”E), collector: Farid Faraji.

Remarks – Chant & Yoshia-Shaul (1987) provided a re-description of T. baccettii based on non-type material collected in Italy. All the features of specimens collected in The Netherlands fit well with those.

Figures

Figure 12. Typhlodromus (Typhlodromus) baccettii Lombardini (Female): (A) Idiosoma, dorsal view; (B) Idiosoma, ventral view; (C) Spermatheca; (D) Chelicera; (E) Tarsus leg IV.