Antennoseius (Vitzthumia) hyperboreus Nikolsky, 1988

Joharchi, Omid, Marchenko, Irina I. & Stanyukovich, Maria K., 2022, New data on some Antennoseius Berlese species (Acari: Ascidae) from Russia, Acarologia 62 (2), pp. 378-395 : 385-389

publication ID	https://doi.org/ 10.24349/4vni-nutt
persistent identifier	https://treatment.plazi.org/id/B07E8782-6511-DA1B-FE5F-FF3E28F7FADD
treatment provided by	Felipe
scientific name	Antennoseius (Vitzthumia) hyperboreus Nikolsky, 1988
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Treatment

Antennoseius (Vitzthumia) hyperboreus Nikolsky, 1988 View in CoL

Antennoseius (Vitzthumia) hyperboreus Nikolsky, 1988: 30 View in CoL .

Antennoseius (Vitzthumia) hyperboreus Beaulieu et al., 2008: 55 View in CoL ; Moraza and Kazemi, 2009:

65; Moraes et al., 2016: 69.

( Figures 4-6 View Figure 4 View Figure 5 View Figure 6 )

Specimens examined — Type material: slide number 75 with two adult females (holotype and paratype), Gydanskiy Peninsula, vicinity of Nosok village, Krasnoyarskii Krai, tundra,

24.07.1977, B.S. Yudin coll. on Microtus oeconomus (Pallas) ( Rodentia : Cricetidae ); deposited in ISEA, Novosibirsk.

Redescription — Female — Holotype and one paratype measured.

Dorsal idiosoma ( Figures 4A View Figure 4 , 5A & 5C View Figure 5 ) — Idiosoma oval (595–599 long × 341–345 wide);

dorsal shield divided and harshly lineate-reticulate over entire surface ( Figures 4A View Figure 4 & 5A View Figure 5 ).

Podonotal shield (320–324 long × 323–326 wide) with 20 pairs of setae (j1–6, z1–6, s1–6, r2,

and one extra set of paired setae x between s3–s4), setae r2 and x off shield on the left side

(in holotype), and nine pairs of pore-like structures, including four pairs of gland openings

(gd1, gd2, gd4, gd5) and five pairs of poroids id (1–2, id4–6) ( Figures 4A View Figure 4 & 5A View Figure 5 ). Setae j1

(32–34) longest, slightly thicker, sparsely barbed, z1 (16–18) shortest, other podonotal shield setae sub-equal (27–35) and smooth ( Figures 4A View Figure 4 , 5A & 5C View Figure 5 ). Opisthonotal shield (273–275

long × 302–306 wide), evenly rounded posteriorly, with 15 pairs of setae (27–35) (J1–5, Z1–5,

S1–5), R1 on the right side of anterolateral corner of the shield in holotype ( Figures 4A View Figure 4 & 5A View Figure 5 ),

setae Z5 (40–42) longest, slightly thicker, sparsely barbed, and 13 pairs of pore-like structures,

including three pairs of gland openings gd (6, gd8, gd9) and ten pairs of poroids idm (1–idm6,

is1, idl1, idl3, idx) ( Figures 4A View Figure 4 & 5A View Figure 5 ). Lateral soft cuticle with 35–36 pairs of setae (including ventral setae), including r3–6 and 31–32 pairs of hypertrichous series R and UR, and two pairs of poroids. Muscle-marks (sigillae) visible mostly on podonotal shield ( Figures 4A View Figure 4 & 5A View Figure 5 ).

Ventral idiosoma ( Figures 4B View Figure 4 , 5B, 5 View Figure 5 D-E) — Tritosternum with paired pilose laciniae (100–

103), fused basally (20–22), columnar base 24–26 × 20–23 wide; presternal area with a pair of narrow and faint platelets, sternal shield length 134–137, width 117–121, fused to endopodal elements between coxae I and II, with a median notch in its anterior margin, posterior margin irregularly straight, slightly lineate on lateral margins, region anterior iv to 1 poorly sclerotized,

with three pairs of smooth setae (st1 35–37, st2 33–35, st3 29–31) (st3 off shield on right side in holotype), and three pairs of poroids iv (3 absent on left side in holotype) ( Figures 4B View Figure 4 , 5B & 5E View Figure 5 ).

Metasternal setae st4 (28–30) smooth, inserted on soft cuticle. Endopodal platelets between coxae II-III and III-IV present, small and free. Genital shield drop-shaped length 174–176,

width 73–76, faintly lineated anteriorly, anterior margin of shield convex, not overlapping posterior margin of sternal shield, posterior margin evenly rounded, setae st5 (27–29) on lateral margins of shield, paragenital poroids iv5 located on soft cuticle laterad to shield near setae

st5 ( Figures 4B View Figure 4 , 5B & 5D View Figure 5 ). Anal shield subtriangular, length 113–116, width 92–95, with lineate-reticulate over entire surface, para-anal setae and post-anal seta subequal in length

(20–22), cribrum large, goatee-shaped, restricted to area behind postanal seta ( Figures 4B View Figure 4 , 5B View Figure 5

& 5D); anal gland pores gv (3) on anterolateral margin of anal shield, posterior to paranal setae,

a pair of postanal sigillae present. Soft opisthogastric cuticle with pair of sub-oval metapodal plates (20–22 long × 9–12 wide), ten pairs of setae, Jv1–3 and Zv1–4 smooth, Jv4–5, and Zv5

slightly ticker, with 1–2 small barbs, and four pairs of poroids (three ivo ; ivp) and a gland pores

gv2, laterad to coxae IV. Peritrematal shield fused with exopodal elements along coxae II to IV,

anteriorly fused to podonotal shield, with longitudinal lines, evenly rounded posteriorly behind coxae IV, with one pair of glandular pore and two pairs of poroids; poroid ip1 and adjacent gland pore gp2 inserted at level between coxae II and III, and poroid ip2 next to posterior edge of stigma ( Figures 4B View Figure 4 & 5B View Figure 5 ). Peritremes long, extending from stigmata at mid-level of coxae

IV to anterior margin of coxae I ( Figures 4B View Figure 4 & 5B View Figure 5 ).

Gnathosoma ( Figures 4 View Figure 4 C-D & 5F-G) — Anterior margin of epistome convex, irregularly denticulate, mid surface of epistome with transverse line denticles, concave medially (Figure

4C & 5G). Hypostomal groove with seven transverse rows of denticles, each row with 4–9

small denticles, with smooth anterior and posterior transverse lines, all connected laterally, th 6

and 7 th rows slightly convex and concave, respectively ( Figure 5F View Figure 5 ). Hypostome with four pairs of smooth setae, h1 (44–46)> pc (33–35)> h2 ≈ h3 (27–30). Corniculi robust and horn-like,

slightly shorter than smooth internal malae. Supralabral process not distinguishable. Labrum blade-like, slightly shorter than internal malae. All palp setae smooth and needle-like except d1

on palpfemur with some barbs, palp-tarsal claw two-tined. Fixed digit of chelicera with an offset distal tooth (gabelzhan), followed by 19–20 small sized teeth, a minute setiform pilus dentilis,

dorsal cheliceral seta thickened, thorn-like, movable digit with two large teeth medially, with a ventral projection, arthrodial membrane with a rounded flap, cheliceral lyrifissures distinct

( Figure 4D View Figure 4 ).

Legs ( Figure 6 View Figure 6 ) — Legs II (506–512) and III (480–486) short, legs I (694–700) and IV

(606–612) longer. Legs I to IV with chaetotactic formulae of femora, genua, tibiae as described for genus ( Figure 6 View Figure 6 ). Coxae II–IV lineate on posterior inner surfaces and setae of coxae I–IV normal, slender ( Figure 4B View Figure 4 ). Legs I–IV setae unmodified, some setae sparsely barbed (more distinct on legs I and IV, Figure 6 View Figure 6 ), not elongated as macrosetae, except four subapical setae on tarsus I elongated (ratio of subapical setae / tarsus I length ≈ 0.65). Tibia III having nine setae,

pl2 present. Complement of setae on segments of legs I-II-III-IV: coxae 2–2–2–1; trochanters

6–5–5–5; femora 2–3/1–2/2–2; 2–3/1–2/2–1; 1–2/1–1/0–1; 1–2/0–1/1–1; genua 2–3/1–3/2–2;

2–3/1–2/1–2; 2–2/1–2/1–1; 2–2/0–3/1–1; tibiae 2–3/1–3/2–2; 2–2/1–2/1–2; 2–1/1–2/1–2;

2–1/1–3/1–2 and tarsi II-IV 3–3/2–1/1–3/2–3.

Remarks — Antennoseius (V.) hyperboreus was described from tundra in Northern Russia

( Nikolsky 1988). It has been found on tundra vole, Microtus oeconomus (Pallas) ( Rodentia :

Cricetidae ). Since that time, there has been no other formal occurrence or recording A of. (V.)

hyperboreus in the world. The original description of the species is brief and its illustrations are incomplete, lacking many important details. We herein redescribe A. (V.) hyperboreus on the basis of type series to complement the original description which provided by Nikolsky

(1988). The species is easily recognized by the podonotal shield with 20 pairs of setae, none of the setae enlarged (in distinction from others), setae j1 and Z5 sparsely barbed and slightly thicker than other setae, sternal shield with strong anterior medial notch (reaching to level of iv1), lateral soft cuticle with 35–36 pairs of setae (including ventral setae), coxal setae on legs

I–IV slender and setiform, four long subapical setae on tarsus I (ratio of subapical setae / tarsus

I length ≈ 0.65).

Kingdom	Animalia
Phylum	Arthropoda
Class	Arachnida
Order	Mesostigmata
Family	Ascidae
Genus	Antennoseius