Amblyseiulus jugortus ( Athias-Henriot, 1966 )

Kolodochka, L. A., 2024, Predatory Mites (Phytoseiidae, Parasitiformes) Of The Fauna Of Ukraine: Redescriptions Of The Species Of Amblyseiella And Chelaseius, With Resurrection Of The Genus Status For Amblyseiulus, Zoodiversity 58 (2), pp. 103-128 : 113-115

Amblyseiulus jugortus ( Athias-Henriot, 1966) ( fig. 4 )

Amblyseius jugortus Athias-Henriot, 1966: 189 ; Karg, 1971: 202; Athias-Henriot, 1980: 7;

Proprioseiopsis jugortus : Moraes, de et al., 1986: 116; Karg, 1993: 175; Chant & McMurtry, 2007: 89; Denmark & Evans, 2019: 74.

Material. Types. Holotype ♀: France: Corcelles-les-Monts , Cote d’Or, moss with Juniperus sp. , 30– 03 1964, specimen Dijon N 814 [Laboratoire d’Acarologie de l’Éсоlе Pratique des Hautes Études, Paris] (not examined; the description and figures are based on a non-type specimen from Ukraine).

Non– type. 14 specimens (13 ♀, 1 Ơ). Ukraine: Poltava District, Lubny area, Zasullia village , meadow, litter, 01.08.1972, specimen #S–56/100 e, 2 Ơ; idem, the same date, specimen #S–119/100 j, 1 Ơ; Poltava Sity, env., meadow, soil 0-5, 24.08 1975, specimen #S–51/76b , 1 ♀; idem, litter under Picea sp. , the same data: specimen #S–128/ 78g , 1 ♀; specimen #S–129/78 d, 1 ♀; specimen #S–138/75p, 1 ♀; specimen #S–139/75r, 1 ♀; specimen #S–142/ 75m, 1 ♀;specimen #S–145/79p, 1 ♀; specimen #S–146/79r, 1 ♀; specimen #S–147/79s, 1 ♀; specimen #S–150/79f, 1 ♀; specimen #S–151/79x, 1 ♀ ( Skliar ) ( SYSK) .

R e d e s c r i p t i o n. F e m a l e. Dorsal shield ( fig. 4 , 1 ) well sclerotized, smooth, with dark marginal border, broadly oval, bearing 7 pairs of solenostomes (it, iv, id, isc, il, is, ic). Dorsal scutellum setae AL4, PM 3, PM 4 thick, distinguished by greatest v length among other dorsal setae. Setae AD1, AM 1, and AL1 are small, others short to minute. All setae spiky, except for the rarely serrate PM 3 and PM 4. Seta AM 1 shorter than distance from its theca to theca of seta AL1. Seta AL1 more than twice as long as seta AL3, does not reach its theca. Seta AL3 markedly displaced toward axis of dorsal shield from common arc of setae AM 1–AL1–AL4 and located on line connecting thecae of setae AL1– PM 1. In other words, the setae of the AD1 pair are moved away from the axial line of the dorsal shield, and the setae AM 1 are moved closer to it, as compared with the location of the same pairs of setae, common for species of related genera. Seta AL1 (18–20 µm) 2.5–2.6 times as long as AL2 (7–8 µm). Seta AL1 shorter than distance from its theca to theca AL2. Perithremes extend beyond the level of the tecae of setae AD1.

Ventral shield somewhat wider than genital shield, sculptured in anterior third by thin transverse lines, narrowing caudally, with straight or slightly concave lateral margins ( fig. 4 , 2 ). Anal pores located between the thecae of PrA2 setae and almost in line with them. Metapodal shields elongated; the posterior one is wide and 1.75 times as long as the anterior one ( fig. 4 , 3 ). Posterior end of peritremal shield weakly curved ( fig. 4, 4 ). Chelicerae with 9 teeth on Df, and 2 on Dm ( fig. 4 , 5 ). Spermatheca small with thick walls and short infundibulum, expands from atrium to sacculus; atrium large, asymmetric, immersed in funnel base ( fig. 4 , 6 ).

Macroseta on leg IV long, thickened, pointed; macrosetae on tibia and basitarsus equal in length, macroseta on tibia one third shorter ( fig. 4 , 7 ). Genu and tibia III, as well as genu II with short macrosetae.

Measurements. Lds 376, Wds 270; Lvas 111, Wvas 90, Lian 37; Ltar 143; setae length: AD1 28; AD2 5; AD3 5; AD4 7; PD 4 7; AM 1 27; AM 2 6; AL1 18; AL3 7; AL4 89; PL 1 9; PL 2 9; PL 3 10; PM 1 8; PM 3 135; PM 4 180; AS 13; PS 6; PV 78; MCh IV: ge 80, ti 57, ta 60; MCh III: ge 43, ti 28; MCh II: ge 21; MCh I: ge 25.

Male. Setae of pairs AD1 and AM 1 are similar to those in female (setae of pair AD1 are spaced apart, while pairs of AM 1 are spaced closer together). Ventrianal shield with 3 pairs of preanal setae and round anal pores situated practically on the line of the tecae of PrA2 setae. Spermatodactyl L-shaped. Lds — 280.

D i s t r i b u t i o n, h a b i t a t, o c c u r r e n c e. Europe ( France, Island, Netherlands, Norway, Russia — Arkhangelsk). In Ukraine: this species is known only in parks and the vicinity of Poltava City (meadow, litter under Picea , soil); rare ( Kolodochka & Skliar, 1981).

Diagnosis. This species is morologically close to Amblyseius messor , which also has similar long setae AL4, PM 3, PM 4 on the dorsal shield. These species are easily distinguished by the ratio of the lengths of two pairs of dorsal setae: in A. messor the seta AL1 is 2 times as long as AL3, and in A. jugortus it is at least 2.5 times longer then it. In A. messor , the funnel walls of the spermatheca are comparatively thinner and the semi-cilindric funnel itself is narrow, while in A. jugortus , the funnel walls are thick and the conic funnel is short and wide.

Amblyseius jugortus is also similar to A. ovicinctus (see lower) but its dorsal setae AL4 86, PM 3 135, PM 4 180, and PV 78 µm are distinctly longer than those of A. ovicinctus (78, 110, 130, 57, respectively). The macrosetae on the legs of these two species also differ not only in their absolute length, but also in the relative length of the macrosetae of the same name (see Measurements in both species). The infundibulum of A. jugortus is short and wide with a thick wall, while in A. ovicinctus it is longer and it wall are thinner. A comparison of these taxonomically significant for species identification of phytoseiids details of the internal structure ( fig. 4 , 6 and fig. 8 , 6 ) finally convinces of the species independence of these forms.

Figures

Fig. 4. Amblyseiulus jugortus (Athias-Henriot, 1966) (fig. 4) ♀ (1–7), Ơ (8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicera with spermatodactyl.

Fig. 1. Amblyseiella antonii Kolodochka & Omeri, 2010 ♀ (1–9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — genu; 8 — tibia; 9 — tarsus (fragment).

Fig. 2. Chelaseius valliculosus Kolodochka, 1987 ♀ (1–7), Ơ (8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicera with spermatodactyl; 10 — distitarsus of leg I.

Fig. 3. Amblyseiulus bregetovae (Abbasova, 1970) ♀ (1–7): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV.

Fig. 5. Amblyseiulus mauiensis (Prasad, 1968) ♀ (1–7): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV.

Fig. 6. Amblyseiulus messor (Wainstein, 1960) ♀ (1–7), Ơ (8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicera with spermatodactyl.

Fig. 7. Amblyseiulus okanagensis (Chant, 1957) ♀ (1–7), Ơ (8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicera with spermatodactyl.

Fig. 8. Amblyseiulus ovicinctus (Athias-Henriot, 1961) ♀ (1–7): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV.