Radfordia (Microtimyobia) golenishchevi, Bochkov, 2011

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 : 7-8

Key to species of the subgenus Microtimyobia Fain and Lukoschus, 1976

Females

In some couplets characters of female TN are included

(Females of R. (M.) golenishchevi sp. nov. and R. (M.) pitymys sp. nov. are sheathed in the TN skin and, therefore, many of their characters are not discernible)

1. Setae 2a more than 3 times longer than 2b ................................................................. 3

- Setae 2a more than 3 times shorter than 2b ................................................................ 2

2. Subcapitular setae m lanceolate. Subcapitulum ventrally with pair of distinct lobes. Distance d1-d2 about 2 times shorter than c1-d1. Setae e1 and f1 filiform. Setae e2 much shorter and narrower than vi. Setae 3a subequal to 2b .............................................................................. R. (M.) zibethicalis ( Radford, 1936) ( Figs. 42 , 44A, B )

- Subcapitular setae m with 3 tines. Subcapitulum ventrally without lobes. Distance d1-d2 and c1-d1 subequal. Setae e1 and f1 narrow lanceolate. Setae e2 subequal to vi. Setae 3a at least 2 times shorter than 2b ............................................................................................ R. (M.) arborimus Fain and Whitaker, 1975 ( Fig. 45 )

3. Setae e1 and f1 narrow lanceolate....................................................................... 10

- Setae e1 and f1 filiform................................................................................ 4

4. Setae 2a and 3a whip-like, subequal. Distances c1-d1 and d1-d2 subequal. Setae c2 distinctly narrower than ve ........... 5

- Setae 3a short, subequal 2b and much shorter than whip-like 2a. Distances c1-d1 1.5 times longer than d1-d2. Setae ve and c2 subequal in width......................................................... R. (M.) dinaromys sp. nov. ( Fig. 39 )

5. Setae ag2 at least 3 times longer than ag1 .................................................................. 7

- Setae ag1 and ag2 subequal or ag2 slightly longer than ag1 ................................................... 6

6. Subcapitular setae m with 3 or rarely 4 tines. Posterior end of vulvar region without punctations. Body lenght/width ratio 1.9:1..................................................... R. (M.) synaptomysi Bochkov and Mironov, 1998 ( Fig. 35 )

- Subcapitular setae m with 5 tines. Posterior end of vulvar region scarcely punctated. Body long/width ratio 1.5:1.................................................................... R. (M.) arvicolae Fain and Lukoschus, 1977 ( Fig. 27 )

7. Body length/width 1.7–1.9:1. Setae c2 60–80 long, far from reaching level of seta e2 bases. Anterior margin of vulvar region widely rounded. Tarsus IV of female TN with 2–4 setae....................................................... 8

- Body length/width 1.4–1.6:1. Setae c2 longer 110, almost reaching level of seta e2 bases. Anterior margin of vulvar region almost straight. Tarsus IV of female TN without setae.......... R. (M.) arctica Fain and Lukoschus, 1977 ( Figs. 29 , 31C )

8. Subcapitular setae m with 3–4 tines. Vulvar region with ornamentation........................................... 9

- Subcapitular setae m with 2 tines. Vulvar region without ornamentation.................................................................................................... R. (M.) myopusi Bochkov and Mironov, 1998 ( Fig. 37 )

9. Subcapitular setae m with 3–4 tines. Vulvar region densely covered by punctation. Tarsus IV of female TN with 4 setae......................................... R. (M.) hylandi Fain and Lukoschus, 1977 ( Fig. 23 ) and R. (M.) pitymys sp. nov.

- Subcapitular setae m with 3 tines. Vulvar region covered by punctation only in posterior part. Tarsus IV of female TN with 3 setae....................................................... R. (M.) lemmus Fain and Lukoschus, 1977 ( Fig. 32 )

10. Setae 1b and 1d slightly thickened, not more than 1.5 times thicker than 1a (in R. abramovi - scale like). Ventral projection on trochanter I present................................................................................... 12

- Setae 1b and 1d strongly thickened, more than 2 times thicker than 1a. Ventral projection on trochanter I absent......... 11

11. Subcapitular setae m with 2 tines. Setae ps3 moderately developed, 8–10 long and slightly curved. Ventral surface on trochanter I covered by tubercles in inner part............................ R. (M.) alticolae Bochkov, 1995 ( Figs. 14 , 16 )

- Subcapitular setae m lanceolate, pointed apically. Setae ps3 very short, about 6 long and almost straight. Ventral surface on trochanter I without tubercles................................... R. (M.) ladakensis Fain and Lukoschus, 1976 ( Fig. 22 )

12. Setae 3a whip-like, subequal to 2a and much longer than 4a .................................................. 13

- Setae 3a relatively short, subequal to 4a and much shorter than 2a ........................................................................... R. (M.) eothenomys Fain and Lukoschus, 1976 ( Fig. 18 ) and R. (M.) golenishchevi sp. nov.

13. Setae 1b and 1d filiform. Setae vi, si, and se without antrorse projection in basal part. Vulvar region not strongly sclerotized in antero-median part................................................................................... 14

- Setae 1b and 1d scale-like. Setae vi, si, and se with antrorse projection in basal part. Vulvar region strongly sclerotized in antero-median part............................................ R. abramovi Bochkov and Mironov, 1998 ( Fig. 55 )

14. Subcapitular setae lanceolate, pointed apically. Setae vi distinctly wider than e2 ................................... 16

- Subcapitular setae with 3–5 or more rarely 2 tines. Setae vi slightly wider or subequal to e2 .......................... 15

15. Subcapitular setae m with 2–4 tines, usually with 3 tines. Setae f2 of female TN stick-like......................................... R. (M.) lemnina ( Koch, 1841) ( Figs. 1 , 3–8 ) and R. (M.) clethrionomys Fain and Lukoschus, 1977 ( Figs. 9 , 10 )

- Subcapitular setae m with 4–5 tines. Setae f2 of female TN narrowly lanceolate... R. (M.) rufocani Bochkov, 1995 ( Fig. 11 )

16. Vulvar region not punctuated. In female TN, setae e1, e2, and f1 very short, at least 3 times shorter than d2, setae 4a not thickened.............................................................................................. 17

- Vulvar region densely punctated. In female TN, setae e1, e2, and f1 distinctly or moderately developed, longer or only slightly shorter than d2, setae 4a distinctly thickened........................ R. (M.) cricetuliphila Bochkov, 1999 ( Figs. 58 , 60 )

17. Setae si about 3 times wider than se. Setae c2 slightly longer than c1, d1, and d2. Setae 3a and 4a of female TN whip-like, longer than 2a .............................................. R. (M.) triton Fain and Lukoschus, 1976 ( Figs. 47 , 52B )

- Setae si and se subequal in width. Setae c2 slightly shorter than c1, d1, and d2. Setae 3a and 4a of female TN shorter than 2a .................................................................. R. (M.) cricetulus Fain, 1973 ( Figs. 61 , 63 )

Figures

FIGURE 1. Radfordia (M.) lemnina (Koch, 1841), female from Microtus arvalis. A, dorsal view; B, ventral view.

FIGURE 3. Radfordia (M.) lemnina (Koch, 1841), details of female from Microtus arvalis. A, gnathosoma in dorsal view; B, same in ventral view; C, leg I in dorsal view; D, same in ventral view.

FIGURE 4. Radfordia (M.) lemnina (Koch, 1841), legs II–IV of female from Microtus arvalis in ventral view. A, leg II; B, leg III, C, leg IV.

FIGURE 5. Radfordia (M.) lemnina (Koch, 1841), details—vulvar region of female, genital cone of males, and setae m.

FIGURE 6. Radfordia (M.) lemnina (Koch, 1841), details—genital cone of males and setae m.

FIGURE 7. Radfordia (M.) lemnina (Koch, 1841), details—genital cone of males and setae m.

FIGURE 8. Radfordia (M.) lemnina (Koch, 1841), tritonymph from Microtus arvalis. A, female TN in dorsal view; B, same in ventral view; C, leg IV of female TN in dorsal view; D, male TN in dorsal view; E, same in ventral view; F, leg IV of male TN in dorsal view. Scale bars: A, B, D, E = 100 µm; C, F = 50 µm.

FIGURE 9. Radfordia (M.) clethrionomys Fain and Lukoschus, 1977, details—genital cone of males and setae m.

FIGURE 10. Radfordia (M.) clethrionomys Fain and Lukoschus, 1977 from Myodes glareolus, female tritonymph. A, idiosoma in dorsal view; B, same in ventral view; C, leg IV in dorsal view. Scale bars: A, B = 100 µm; C = 50 µm.

FIGURE 11. Radfordia (M.) rufocani Bochkov, 1995 from Myodes rufocanus, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Specimen from Alticola lemminus. E, seta m. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 14. Radfordia (M.) alticolae Bochkov, 1995 from Alticola argentatus, female. A, dorsal view; B, ventral view.

FIGURE 16. Radfordia (M.) alticolae Bochkov, 1995, details—vulvar region of female, genital cone of males, and setae m.

FIGURE 18. Radfordia (M.) eothenomys Fain and Lukoschus, 1976, female (after Fain & Lukoschus 1977 with minor modifications). A, dorsal view; B, ventral view.

FIGURE 22. Radfordia (M.) ladakensis Fain and Lukoschus, 1976, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 23. Radfordia (M.) hylandi Fain and Lukoschus, 1977 from Microtus pennsylvanicus, female. A, dorsal view; B, ventral view; C, seta m, D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 27. Radfordia (M.) arvicolae Fain and Lukoschus, 1977, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 29. Radfordia (M.) arctica Fain and Lukoschus, 1977 from Dicrostonyx torquatus, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 31. Radfordia (M.) arctica Fain and Lukoschus, 1977 from Dicrostonyx torquatus, female tritonymph. A, idiosoma in dorsal view; B, same in ventral view; C, leg IV in ventral view. Scale bars: A, B = 100 µm; C = 50 µm.

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 35. Radfordia (M.) synaptomysi Bochkov and Mironov, 1998, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 37. Radfordia (M.) myopusi Bochkov and Mironov, 1998, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 39. Radfordia (M.) dinaromys sp. nov., female holotype. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 42. Radfordia (M.) zibethicalis (Radford, 1936), female. A, dorsal view; B, ventral view.

FIGURE 44. Radfordia (M.) zibethicalis (Radford, 1936), details. A, seta m of female, B, vulvar region, C, seta m of male; D, genital cone.

FIGURE 45. Radfordia (M.) arborimus Fain and Whitaker, 1975, female (after Fain & Whitaker 1975 with minor modifications). A, dorsal view; B, ventral view.

FIGURE 47. Radfordia (M.) triton Fain and Lukoschus, 1977, female. A, dorsal view; B, ventral view; C, seta m. Scale bars: A, B = 100 µm; C = 50 µm.

FIGURE 52. Radfordia (M.) triton Fain and Lukoschus, 1977, female tritonymph. A, idiosoma in dorsal view; B, same in ventral view; C, tarsus IV in ventral view. Male tritonymph. D, idiosoma in dorsal view; E, same in ventral view; F, tarsus IV in ventral view. Scale bars: A, B, D, E = 100 µm; C, F = 50 µm.

FIGURE 55. Radfordia (M.) abramovi Bochkov and Mironov, 1998 from Phodopus roborovskii, female. A, dorsal view; B, ventral view; C, vulvar region. Scale bars: A, B = 100 µm; C = 50 µm.

FIGURE 58. Radfordia (M.) cricetuliphila Bochkov, 1999 from Cricetulus barabensis, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 60. Radfordia (M.) cricetuliphila Bochkov, 1999 from Cricetulus barabensis, female tritonymph. A, idiosoma in dorsal view; B, same in ventral view; C, tarsus IV in ventral view. Male tritonymph. D, opisthosoma in ventral view. Scale bars: A, B, D = 100 µm; C = 50 µm.

FIGURE 61. Radfordia (M.) cricetulus Fain, 1973 from Cricetulus migratorius, female. A, dorsal view; B, ventral view; C, seta m. Scale bars: A, B = 100 µm; C = 50 µm.

FIGURE 63. Radfordia (M.) cricetulus Fain, 1973 from Cricetulus migratorius, 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.