Graminaseius (s. str.) lituatus ( Athias-Henriot, 1961 ) Kolodochka, 2022

Kolodochka, L. A., 2022, The Predatory Mites (Phytoseiidae, Parasitiformes) In The Fauna Of Ukraine: A New Species And A New Subgenus Of The Genus Graminaseius, Zoodiversity 56 (6), pp. 463-472 : 466-468

Graminaseius (s. str.) lituatus ( Athias-Henriot, 1961) comb. n. ( fig. 2 )

Typhlodromus graminis sensu Westerboer & Bernhard, 1963 — misidentification (see Karg, 1993: 184). Amblyseius lituatus Athias-Henriot, 1961: 440 .

Typhlodromips lituatus: Moraes et al., 1986: 142 .

Amblyseius (Typhlodromips) lituatus: Karg, 1991: 215 : 184;

Material. Type. Holotype ♀: Spain: Pontevedra , Isla Cies Sur , litter under Armeria langeana on a slope to the open sea, IB: specimen # Sp 411 ( Laboratoire d’Acarologie de l’Éсоlе Pratique des Hautes Études, Paris) (not examined).

Non-type. Ukraine: Crimea, Sudak Distr., env. of Gromovka village , litter from leaves of pear [specimen #S–243 (51–54 in H. Sherbak’s manuscript catalog)], 19.06.1975, 1 ♀ ( Kolodochka ) ( SIZK) .

Female. Dorsal shield ( fig. 2 , 1 ) well sclerotized, with dark marginal border, smooth, broadly oval, without lateral emarginations; 7 pairs of small, poorly visible solenostomes (it, iv, id, isc, il, is, ic). Dorsal setae sharply contrasting in length from long (50–100 µm) to miniature (4–6 µm), while the thickness of the long setae does not interfere with their flexibility. All setae are smooth. Seta AM 1 equal to or somewhat longer than distance to theca AL 1. Seta AL 1 longer than distance to theca of seta AL 3, which in turn reaches theca AL 4. Seta PL 1 longer than the distance to theca PL 2 and theca PM 3. Perithreme long, almost reaching the theca of seta AD1. Ventrianal shield with transverse striation, slightly concave anterior margin and small side notches; anal pores distinct, small, round ( fig. 2, 2 ). The posterior metapodal shield is 1.8 times as long as the linear anterior one ( fig. 2 , 3 ). Posterior part of peritremal shield curved, narrow, blunt ( fig. 2 , 4 ). On Df chelicera 2 teeth, on Dm 1 ( fig. 2 , 5). The funnel of the spermatheca is narrow, goblet-shaped, with a distinct asymmetrical constriction; the atrium is sessile ( fig. 2 , 6). The leg of the fourth pair with three macrosetae: the longest one is on the basitarsus ( fig. 2 , 7). Genu of III and II pairs of legs with short macroseta.

Measurements: Lds 375, Wds 215, Lvas 120, Wvas 110, Lian 45; Ltar IV 140. Setae length: AD1 29; AD2 4; AD3 5; AD4 6; PD 2 6; PD 4 9; AM 1 50; AM 2 4; AL 1 39; AL 3 50; AL 4 80; PL 1 80; PL 2 8; PL 3 8; PM 1 6; PM 3 90; PM 4 100; AS 40; PS 20; PV 68. MCh IV: ge 63, ti 60, ta 84; MCh III: ge 27; MCh II: ge 27.

Male. Preanal setae 6 pairs; anal pores small, round ( fig. 2 , 8). The spermatodactyl is massive, T-shaped ( fig. 2 , 9). Lds 275.

Diagnosis. Graminaseius lituatus is similar to G. graminis in topography of idiosomal setae and a small number of teeth on the chelicerae (both have 1 tooth on Dm, but the first has 2 teeth on Df, and the second has 3 teeth), but differs well in the much sharper differentiation of dorsal setae along length and thickness, the shape of the spermatheca, also goblet-shaped, as in the second species, but with a much more pronounced median constriction.

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: Italy, Spain; Ukraine (first record). In Ukraine: Crimea, soil; litter; rarely.

Subgenus Alustoseius Kolodochka , subgen. n.

urn:lsid:zoobank.org:act:BB4789F0-E103-4698-A5EE-C2E418A28E9B

Type species: Amblyseius alustoni Livschitz & Kuznetzov, 1972 .

The new subgenus differs from the nominative subgenus by the dorsal setae aligned in length in the range of 20–70 µm, dorsal shield moderately sclerotized, without dark border and smooth in anterior half, but in its posterior part with fine reticulate sculpture and 4 pairs of solenostomes on dorsal shield. In Graminaseius s. str., the dorsal setae contrast in length in the range of 4–100 µm, idiosomal shields strongly sclerotized and smooth with dark border and 7 pairs of solenostomes on dorsal shield.

Etymology. The name of the new subgenus is combined from alusta (a Qırımlı name Aluşta of one of the main Crimean cities) and – seius, the second half of the names Amblyseius , Graminaseius , etc.

Figures

Fig. 2. Graminaseius lituatus (Athias-Henriot) ♀ (1–7), Ơ (8–10 from Athias-Henriot, 1961): 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, 10 — chelicera with spermatodactyl.

Fig. 1. Graminaseius graminis (Chant, 1956) ♀ (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 — chelicera with spermatodactyl; 9 — ventrianal shield.

Fig. 3. Graminaseius alustoni (Livschitz et Kuznetzov, 1972) comb. n. ♀: 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — chelicera; 5 — spermatheca; 6 — posterior part of peritremal shield; 7 — fragment of leg IV.

Fig. 4. Graminaseius altimontanus Kolodochka, sp. n., holotype ♀: 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — spermatheca; 5 — posterior part of peritremal shield; 6 — fragment of leg IV.