Radfordia (Microtimyobia) lemmus Fain and Lukoschus, 1977

Bochkov, Andre V., 2011, Mites of the subgenus Microtimyobia (Acariformes: Myobiidae: Radfordia) and their host-parasite relationships with cricetid rodents (Cricetidae) 2954, Zootaxa 2954 (1), pp. 1-86 : 45-46

12. Radfordia (Microtimyobia) lemmus Fain and Lukoschus, 1977

( Figs. 32–34 )

Radfordia (Microtimyobia) arctica lemmus Fain and Lukoschus, 1977: 77 , 77–80, 93, 94, 108

Radfordia (Microtimyobia) lemmus, Bochkov 1995: 489

Diagnosis. FEMALE ( Fig. 32 ). Subcapitular setae m with 3 tines. Setae vi distinctly thicker and longer than e2. Setae e1 and f1 filiform. Distances c1-d1 and d1-d2 subequal. Vulvar region almost without ornamentation; anterior margin of vulvar region widely rounded. Setae ps3 distinctly developed, slightly curved. Setae ag2 at least twice longer than ag1. Setae 1b and 1d slightly thicker than 1a. Setae 2a and 3a whip-like, much longer than 2b. Trochanter I with ventral projection, without tubercles. Measurements of paratype ( Fain & Lukoschus 1977): body, including gnathosoma, 410 long, 220 maximum wide. Lengths of setae: si 90, se 85, c1 60, c2 75, d1 60, d2 70, e1 12, e2 45.

MALE ( Fig. 33 ). Subcapitular setae m filiform. Genital cone slightly elongated, length/width ratio 1.4:1, with straight slanting lateral margins without projections. Bases of setae vi situated anterior to setae ps2. Setae f1 3 times shorter than e2. Posterior end of opisthosoma without tubercles dorsally and with tubercles ventrally. Setae 2b whip-like, much longer than 2a and 3a. Trochanter I with ventral projection, without tubercles. Measurements of holotype ( Fain & Lukoschus 1977): body, including gnathosoma, 305 long, 170 maximum wide. Lengths of setae: si 25, e1 63/60, e2 33.

FEMALE TRITONYMPH ( Fig. 34 ). Setae f2 and h2 stick-like, other dorsal idiosomal setae narrow lanceolate. Setae 3a and 4a short, much shorter than 2a. Tarsus IV bearing 2 setae and 2 setal alveoli.

Type host and locality. Lemmus lemmus from Sweden as subspecies of R. arctica ( Fain & Lukoschus 1977) .

Hosts and distribution. This species is associated with voles of the genus Lemmus ( Bochkov 1995) .

It was recorded from:

Lemmus lemmus from Sweden ( Fain & Lukoschus 1977);

Lemmus sibiricus from Russia (Taymyr Peninsula) ( Bochkov 1995).

Material examined. Lemmus lemmus — Male holotype ( IRSNB), 1 male and 1 female paratypes ( ZISP), SWEDEN: Sitojaure , Lulelappmark, 16 June 1966, coll. Forstroem.

Lemmus sibiricus — 20 males, 60 females, 8 female TN, and 2 male TN, RUSSIA: Taymyr peninsula, Tareya- Pyasina River, June–July 1976, coll. E. Dubinina.

Type deposition. Radfordia arctica lemmus —IRSNB, male holotype (examined).

Figures

FIGURE 32. Radfordia (M.) lemmus Fain and Lukoschus, 1977 from Lemmus sibiricus, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 33. Radfordia (M.) lemmus Fain and Lukoschus, 1977 from Lemmus sibiricus, male. A, dorsal view; B, ventral view; C, genital cone. Scale bars: A, B = 100 µm; C = 50 µm.

FIGURE 34. Radfordia (M.) lemmus Fain and Lukoschus, 1977 from Lemmus sibiricus, female tritonymph. A, idiosoma in dorsal view; B, same in ventral view; C, tarsus IV in ventral view. Scale bars: A, B = 100 µm; C = 50 µm.