Amblyseiulus okanagensis Muma, 1961

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 : 119-121

Amblyseiulus okanagensis Muma, 1961 ( fig. 7 )

Typhlodromus okanagensis : Chant, 1957: 293;

Typhlodromus okanagensis levis : Wainstein, 1960: 686; Livschitz & Kuznetsov: 1972: 22;

Amblyseiulus okanagensis : Hirschmann, 1962: 7;

Amblyseiulus okanagensis : Karg, 1971, 202;

Amblyseius okanagensis : Giliarov et al., 1977: 240;

Amblyseius (Amblyseius) okanagensis : Arutunjan, 1977: 34;

Amblyseius (Amblyseiulus) okanagensis : Kolodochka, 1978: 43;

Proprioseiopsis okanagensis : Moraes, de et al., 1986: 120; Miedema, 1987: 11; Karg, 1993: 176; Chant & McMurtry, 2007: 89.

Material. Types. Holotype ♀, Canada, British Columbia, Oliver , on peach leaves, N. H. A., specimen #6542 ( CNC) (examined).

Non– types. 97 specimen (80 ♀, 17 Ơ). Ukraine: Autonomouse Republic of Crimea, Cherkasy, Chernihiv, Kyiv, Kherson, Luhansk, Mykolaiv, Poltava, Rivne, Transcarpathia, Vinnitsa, Zhytomyr Regions , 97 specimens ( SIZK) .

Redescription. Female. Dorsal shield ( fig. 7 , 1 ) strongly sclerotized, with dark marginal border, smooth, broadly oval, without lateral emarginations; solenostomes 7 pairs (it, iv, id, isc, il, is, ic), of which ic are the largest. Setae AM 1, AL1, AL3 reach the thecae of next setae. Seta AL3 markedly shifted toward axis of shield from common arc of setae AM 1–AL1–AL3–AL4. Seta PL 1 more than twice as long as setae PL 2 and PL 3. Setae PM 3, PM 4 serrate, others smooth. Perithremes reach the thecae of setae AD1. Shields on ventral side of body heavily sclerotized. Ventrianal shield ( fig. 7 , 2 ) transversely striated, wider than genital shield, narrowing caudally, bearing 3 pairs of setae; anal pores distinct, spaced. Metapodal shields elongate, posterior one not more than twice as long as anterior ( fig. 7 , 3 ). Posterior part of peritremal shield narrow, widening towards pointed end ( fig. 7 , 4 ). Four teeth on Df, 1 on Dm ( fig. 7 , 5 ). Spermatheca ( fig. 7 , 6 ) with a thick-walled bell-shaped funnel and a massive sessile atrium, as if pressed into the funnel. Leg IV has 3 macrosetae: on genu, tibia, and basitarsus, the last of which is longer than the others ( fig. 7, 7 ). Genu III and II with short macrosetae.

Measurements. Lds 408, Wds 265; Lvas 135, Wvas 127, Lian 52; Ltar 138; setae length: AD1 29; AD2 7; AD3 8; AD4 15; PD 4 10; AM 1 52; AM 2 8; AL1 37; AL3 64; AL4 84; PL 1 40; PL 2 14; PL 3 14; PM 1 23; PM 3 77; PM 4 112; AS 36; PS 21; PV 60; MCh IV: ge 55, ti 47, ta 68; MCh III: ge 29; MCh II: ge 27.

Male. Preanal setae 3 pairs; anal pores distinct, spaced ( fig. 7, 7 ). Spermatodactyl curved ( fig. 7 , 8 ). Lds — 310.

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, Transcaucasia, Near East, North America, Far East. In Ukraine: Wood-and-Steppe, Steppe zones, Polissia, Transcarpathia, Crimea (southern slope of the Main Range of Mountains, Yayla; Cape Kazantip): herbaceous plants of the lower tier, litter, rodent nests, soil; by chance — on trees; ordinary.

Diagnosis. A. okanagensis differs from the similar to it A. sororculus in relatevely longer dorsal setae AL1, AL3, and PL 1, as well as by a different ratio of their lengths (in A. sororculus AL 1 twice shorter as AL3, and in A. okanagensis . AL1 is 1.5 times as longer as AL3). While seta PL 1 nearly triple longer then PL 2 and PL 3 in A. okanagensis , and in A. sororculus thees three setae are equal. In addition, seta AL 3 in A. sororculus is near four times shorter than the distance to the theca of seta AL4, while seta AL 3 in A. okanagensis almost equal of seta AL4. In the female A. sororculus , the ventrianal shield is narrower than in A. okanagensis , and the males of thees species are well distinguished by the structure of the spermatodactyl.

N o t e. The description and drawings of the female and male are based on non-type material from Kyiv Region; the morphometry is given according to the re-examined holotype; the male is depicted based on non-type material from Ukraine. During the re-examination of the holotype, a discrepancy in a number of characters was noticed between the holotype and the material from our collection. Thus, setae AL4, PL 1, PM 2, and PM 3 in mites from Ukraine were shorter than similar setae in the holotype by 16, 17, 19, and 25 %, respectively. In addition, the number of teeth on Df in the holotype it are 6, while there are 3–4 teeth in non-type specimen. Other characters were not in doubt. Interestingly, the dimensions of the evasive setae of the studied specimens practically coincide with the dimensions of the same-named setae of the species Typhlodromus okanagensis levis Wainstein, 1960 from Kazakhstan studied by the author from the holotype, which was earlier recognized as a junior synonym of A. okanagensis Chant ( Karg, 1971) . At the same time, the observed discrepancy can be attributed to population differences within the same species. It is this point of view that is proposed to be accepted before conducting comparative studies on samples that are equivalent in number of individuals.

Figures

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. 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. 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. 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. 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.