Antennoseius (Antennoseius) pseudospinosus Eidelberg, 1990

Faraji, F., Dehelean, S. - B., Vuyk, M. & Bakker, F., 2017, Four new species records of Antennoseius and Anystipalpus (Acari: Mesostigmata: Ascidae) phoretic on Carabidae beetles from France, Acarologia 57 (2), pp. 337-353 : 343-347

Antennoseius (Antennoseius) pseudospinosus Eidelberg, 1990 .

( Figures 5 – 7 , 8B )

Antennoseius (Antennoseius) pseudospinosus, Eidelberg, 1990: 78 ; Moraes et al., 2016: 73 .

Female — five specimens measured.

Dorsal idiosoma ( Figure 5A ) — Idiosoma oval, 412 (400 – 435) long; dorsal shield divided and strongly reticulate over entire surface with some short striations especially around setae and behind J4, dorsal shield setae all setiform; podonotal shield 228 (225 – 235) long and 208 (200 – 215) wide at j5 level, with 19 pairs of dorsal setae (r2 seta on the shield), pore-like structures difficult to observe; j1 17 (15 – 18), z1 12 (11 – 13); opisthonotal shield 183 (175 – 195) long and 183 (180 – 185) wide at J2 level with 15 pairs of dorsal setae and 8 pairs of porelike structures; J2 32 (31-33), Z5 35 (32 – 38); lateral soft integument with 4 pairs of r setae (r3-6), r3 23 (22 – 24) and 16 pairs of R – UR setae, most setae on opisthonotal shield and R – UR setae slightly barbed.

Peritreme — Extending anteriorly to level of seta z1 ( Figure 5A ). Peritrematal-exopodal plate reticulate with a line extending behind stigma, slightly widened and notched posteriorly.

Ventral idiosoma ( Figure 5B ) — All ventral setae smooth; tritosternum 90 (89 – 90) long with paired laciniae, free for about two-thirds of total length and pilose, subrectangular base 17 – 18 long and 10 – 11 wide medially; with two pairs of narrow sclerotized presternal plates; sternal shield 114 (113 – 115) long along midline (ignoring anterior concavity), 42 (40 – 45) wide at st2 level; mid anterior part with a depression, shield with two parallel longitudinal lines in the middle, posterior margin of sternal shield concave, with three pairs of sternal setae and two pairs of lyrifissures (iv3 apparently absent in all 23 mounted specimens); st1 25 (24 – 25) long, st1 and st2 slightly thicker than st3 and st4 narrower than st3; epigynal shield 42 (40 – 45) at greatest width, evenly rounded posteriorly with setae st5 on lateral margins; paragenital poroids iv5 on soft cuticle; endopodal plates weakly developed (except for region between coxae I and II, where fused with sternal shield), posterior section represented by one pair of strips between coxae III and IV parallel to epyginal shield and the other pairs positioned transversely between coxae II and III; anal shield weakly reticulate and pear-shaped 85 (78 – 88) long and 59 (55 – 63) of greatest width, with three circumanal setae and gland pores gv3 on shield margin; ten pairs of setae (JV1-5 and ZV1-5) on soft cuticle laterad of anal shield; opisthogastric venter with two pair of metapodal plates, the smaller pair posteriad of peritrematal plate, the larger pair subcircular (about 17x13).

Gnathosoma — Tectum ( Figure 6B ) with anterior margin serrate and with three short projections, dorsal surface with a transverse line of denticles; deutosternum with a smooth transverse line between h3 followed by 7 denticulate transverse lines, denticulate lines with 5 – 9 denticles, line 7 curved and proximalmost line longer ( Figure 6A ); palpcoxal setae (pc) 18 – 20, hypostomal setae h1 25, h2 12 – 13, and h3 17 – 19, all smooth; corniculi horn-like; internal malae slightly fimbriated laterally; fixed cheliceral digit with setiform pilus dentilis and a row of about 15 – 16 teeth, movable digit tridentate (including a tiny subapical denticle)( Figure 6C ); palp apotele two-tined.

Legs ( Figure 7 ) — Lengths, Leg I 385 (380 – 390), leg II 300 (290 – 310), leg III 273 (270 – 280), leg IV 350 (345 – 360); all leg setae smooth except some setae lightly barbed, dorsal seta of trochanter I slightly thickened and barbed apically; setation of legs I – II – III – IV: coxae 2 – 2 – 2 – 1, trochanters 6 – 5 – 5 – 5, femora 12 – 11 – 6 – 6, genua 13 (2 3/2 3/1 2) – 11(2 2/1 3/1 2) – 9 (2 2/1 2/1 1) – 9 (2 2/1 2/1 1), tibiae 13 (2 3/1 3/2 2) – 10 (2 3/1 2/1 1) – 8 (2 2/1 1/1 1) – 10 (2 2/1 2/1 2), tarsus II-IV 3 3/2 3/2 3+ mv,md.

Spermathecal Apparatus — Sacculus vestibules of this species is short and comma-shaped with narrow duct ( Figure 8B ). The sacculus vestibules stays most of the time attached to the margin of coxa III.

Male — Not phoretic and not found.

Specimens examined — 13 April 2015: 7♀♀ on Poecilus cupreus (Linne) ; 27 April 2015: 4♀♀ on Poecilus cupreus (Linne) ; 23 Sep. 2015 2♀♀ on Calathus fuscipes (Goeze) ; 16 Nov. 2015: 2♀♀ on Nebria brevicollis (Fabricius) , 8♀♀ on Nebria salina Fairmaire et Laboulbene , all collected by Bogdan Dehelean in Villeneuve de Mezin, Lot-et-Garonne, South West France .

Remarks — The original description of A. pseudospinosus provided by Eidelberg (1990) is poor with a mistake. He mentioned podonotal shield with 21 pairs of setae. His figure clearly shows r4 and r5 on the shield. The specimens collected in this study however have 19 pairs of setae (setae r4 and r5 off the shield). Dr. Viacheslav Trach confirmed the presence of 19 pairs of podonotal setae on his collected specimens from Ukraine (Pers. Comm. with the senior author).

Figures

FIGURE 5: Antennoseius (Antennoseius) pseudospinosus, adult female: A – Idiosoma, dorsal view; B – Idiosoma, ventral view.

FIGURE 6: Antennoseius (Antennoseius) pseudospinosus, adult female: A – Subcapitulum; B – Tectum; C – Chelicera, lateral paraxial view.

FIGURE 7: Antennoseius (Antennoseius) pseudospinosus, adult female: A – Leg I (excluding tarsus); B – Leg II; C – Leg III; D – Leg IV.

FIGURE 8: Female spermathecal apparatus: A – Antennoseius (Antennoseius) pannonicus; B – Antennoseius (Antennoseius) pseudospinosus; C – Anystipalpus livshitsi; D – Anystipalpus percicola, sacculus vestibules (sv).