Dubininia

Mironov, Sergey V., Ehrnsberger, Rainer & Dabert, Jacek, 2017, Feather mites of the genera Dubininia and Cacatualges (Acari: Xolalgidae) associated with parrots (Aves: Psittaciformes) of the Old World, Zootaxa 4272 (4), pp. 451-490 : 455

Key to Dubininia species

Males

1. Terminal cleft shaped as shallow concavity. Genital shield bearing setae g present. (Parasites of Falconiformes )......... 2.

- Terminal cleft deep U-shaped or triangular; or terminal cleft shaped as shallow concavity and epimerites I are free. Genital shield usually absent. (Parasites of Psittaciformes ).......................................................... 3.

2. Posterior margins of terminal membranes truncated. Sternum about 2/3 the total length of epimerites I. Genital apparatus not enlarged basally................................................... D. microhieracis Dabert and Mironov, 2015 .

- Posterior margins of terminal membranes rounded. Sternum about 1/2 the total length of epimerites I. Genital apparatus enlarged basally........................................................... D. accipitrina ( Trouessart, 1885) .

3. Setae f2 narrowly lanceolate, setae 3a with lanceolate enlargement at base ( Fig. 17 ). ( lorina group).................... 4.

- Setae f2 and 3a simple, filiform ( Fig. 1 )................................................................. 6.

4. Prodorsal and hysteronotal shields fused into entire shield. Bases of setae e, f of tarsus III situated at base of the segment near seta w ( Fig. 23 D)..................................................................... D. micropsittae sp. n.

- Prodorsal and hysteronotal shields separated. Bases of setae e, f of tarsus III situated approximately in middle part of this segment............................................................................................... 5.

5. Ventral process of tarsus II semi-circular. Prodorsal shield with short median extension between bases of setae si. Sternum not longer than 1/3 the total length of epimerites I. Base of seta f of tarsus III closer to base of seta e than to seta w ( Fig. 18 C)................................................................................ D. lorina ( Trouessart, 1885) .

- Ventral process of tarsus II longer than wide. Prodorsal shield without extension between bases of setae si. Sternum about half the total length of epimerites I. Base of seta f of tarsus III situated equidistantly from bases of setae e and w ( Fig. 21 C)........................................................................................ D. charmosynae sp. n.

6. Setae 1a relatively short, not extending beyond level of genital apparatus. Tibia III with dorso-apical spine ( Fig. 8 C)...... 7.

- Setae 1a represented by macrosetae extending far beyond level of genital apparatus. Dorso-apical spine of tibia III present or absent ( Fig. 10 B).................................................................................... 8.

7. Length of idiosoma about 450 µm, scapular setae se, si situated on small rounded sclerites separated from the main body of prodorsal shield. Opisthosomal lobes wide. Terminal extensions of interlobar membrane large, semi-circular. Legs IV with tibia and tarsus extending beyond level of lobar apices ( Fig. 7 )................................... D. pezopori sp. n.

- Length of idiosoma about 350 µm, scapular setae se, si situated on posterolateral extension of prodorsal shield. Opisthosomal lobes narrow. Terminal extensions of interlobar membrane small, poorly expressed. Legs IV with tarsus and distal half of tibia extending beyond level of lobar apices ( Fig. 4 )............................... D. melopsittaci Atyeo and Gaud, 1987 .

8. Tibia III with dorso-apical spine ( Fig. 12 G). Interlobar septa longer than or equal to the length of terminal cleft.......... 9.

- Tibia III without dorso-apical spine ( Fig. 12 C). Interlobar septa shorter than terminal cleft.......................... 10.

9. Sternum present, about half the total length of epimerites I. Prodorsal shield with narrow longitudinal crest in anterior one third. Terminal cleft semi-oval ( Fig. 10 )................................................. D. africana Gaud, 1980 .

- Sternum absent, tips of epimerites I contiguous, almost touching. Prodorsal shield without longitudinal crest. Terminal cleft short, blunt-angular ( Fig. 1 )....................................................... D. curta ( Trouessart, 1885) .

10. Terminal cleft semi-oval. Setae se, si situated on teardrop-like sclerites separated from the main body of prodorsal shield. Anterior margin of hysteronotal shield between setae c2 slightly convex ( Fig. 11 A)........ D. psittacina ( Trouessart, 1885) .

- Terminal cleft roughly triangular. Setae se, si on posterolateral extension of prodorsal shield. Anterior margin of hysteronotal shield between setae c2 shaped as recurved bow ( Fig. 14 A)....................................... D. nestori sp. n.

Figures

FIGURE 1. Dubininia curta (Trouessart, 1885), male. A—dorsal view, B—ventral view.

FIGURE 4. Dubininia melopsittaci Atyeo and Gaud, 1987, male. A—dorsal view, B—ventral view.

FIGURE 7. Dubininia pezopori sp. n., male. A—dorsal view, B—ventral view.

FIGURE 8. Dubininia pezopori sp. n., legs of male. A – D—tibiae and tarsi I – IV, respectively.

FIGURE 10. Dubininia africana Gaud, 1980, male. A—dorsal view, B—ventral view.

FIGURE 11. Dubininia psittacina (Trouessart, 1885), male. A—dorsal view, B—ventral view.

FIGURE 12. Tibiae and tarsi of male. A – D— Dubininia psittacina (Trouessart, 1885), legs I – IV, respectively, E – H— D. africana Gaud, 1980, legs I – IV, respectively.

FIGURE 14. Dubininia nestori sp. n., male. A—dorsal view, B—ventral view.

FIGURE 17. Dubininia lorina (Trouessart, 1885), male. A—dorsal view, B—ventral view.

FIGURE 18. Dubininia lorina (Trouessart, 1885), legs of male. A – D—tibiae and tarsi I – IV, respectively.

FIGURE 21. Dubininia charmosynae sp. n., legs of male. A – D—tibiae and tarsi I – IV, respectively.

FIGURE 23. Dubininia micropsittae sp. n., details. A, B—legs I and II of male, respectively, C—genital apparatus of male, D, E—tibiae and tarsi III and IV of male, respectively, F, G—legs III and IV of female, respectively.