Trouessartia capensis, Berla, 1959

Mironov, Sergey V. & Chandler, C. Ray, 2020, Feather mites of the genus Trouessartia (Acariformes: Trouessartiidae) from passerines (Aves: Passeriformes) in Georgia, USA, Zootaxa 4860 (1), pp. 1-54 : 4-5

Key to New World species of the capensis group

(Males and females)

1. In both sexes, setae d1 present........................................................................... 2

- In both sexes, setae d1 absent........................................................................... 12

2. In females, setae h1 filiform............................................................................. 3

- In females, setae h1 narrowly lanceolate................................................................... 4

3. In both sexes, anterolateral extensions of prodorsal shield angular, extending to epimerites Ia. In males, bases of setae g distinctly separated, postgenital plaque horseshoe-shaped, setae 4b situated posterior to 3a, rudimentary sclerites rEpIIa large ovate, 15–20 in diameter. In females, external copulatory tube finger-like, 20–22 long, anterior part of hysteronotal shield with large ovate lacunae along lateral margins........................................... T. mangaratibensis Berla, 1959

- In both sexes, anterolateral extensions of prodorsal shield rounded, not extending to epimerites Ia. In males, bases of setae g almost touching, postgenital plaque small trapezoidal or bow-shaped, setae 4b anterior to 3a, and rudimentary sclerites rEpIIa small ovate ( Figs. 5B , 7G ). In females, external copulatory tube short conical, 7–10 long, posterior part of hysteronotal shield with small ovate lacunae, anterior part without any lacunae ( Figs. 6A , 7F )............................... T. ciris sp. n.

4. In females, external copulatory tube extending beyond level of setae h3 .......................................... 5

- In females, external copulatory tube extending maximally to midlength between levels of setae h2 and h3............... 6

5. In females, external copulatory tube 70–80 long and extending to midlength between levels of setae h3 and posterior tips of hysteronotal shield ( Fig. 4E ). In males, setae g setiform, situated at level of setae 4a or slightly anterior; adanal shields shaped as small sclerites of irregular form with long blade-like extension directed anterior............................................................................................ T. geospiza OConnor, Foufopoulos and Lipton, 2005

- In females, external copulatory tube about 50–60 long and extending slightly beyond level of setae h3. In males, setae g strongly widened and flattened in basal 2/3, about 5 in width, situated distinctly anterior to setae 4a; adanal shields shaped as small circles around bases of setae ps3 ............................................... T. sicaliae Hernandes, 2014

6. In males, genital shield crescent-shaped, apophyses of adanal apodemes with rectangular ledge at anterior end ( Fig. 4A ). In females, external copulatory tube short conical, 9–15 long ( Fig. 4C ).............................. T. passerinae sp. n.

- In males, genital shield of another shape or absent, apophyses of adanal apodemes of another structure. In females, external copulatory tube stylet- or finger-like, 30–60 long ( Figs. 10F , 13F )............................................... 7

7. In males, setae g strongly widened and flattened in basal 2/3, about 5 in width ( Fig. 10G ). In females, setae ps1 approximately equidistant from levels of setae h2 and h3 ( Fig. 10F )......................................................... 8

- In males, setae g moderately thickened but not flattened ( Fig. 13G ). In females, setae ps1 closer to level of setae h3 ( Fig. 13F ) ................................................................................................... 9

8. In males, setae g situated in area of postgenital plaque. In females, anterior part of hysteronotal shield with poorly distinct ornamentation of ovate and irregularly shaped lacunae, median area of posterior part with obliquely orientated ovate and lanceolate lacunae, setae h1 almost extending to level of setae ps1 ( Fig. 4D )............................. T. capensis Berla, 1959 In males, setae g situated off postgenital plaque ( Fig. 10G ). In females, anterior part of hysteronotal shield with reticulate ornamentation, posterior part with oblique ovate lacunae, setae h1 extending slightly beyond level of setae ps1 ( Fig. 10F )............................................................................................. T. spizellae sp. n.

9. In males, anterior genital papillae larger than posterior genital papillae ( Figs. 13G , 16G ). In females, distal end of primary spermaduct before entering in external copulatory tube with S-like bend ( Figs. 13F , 16F )........................... 10

- In males, anterior and posterior genital papillae similar in size ( Fig. 19G ). In females, distal end of primary spermaduct straight or slightly sinuous ( Fig. 19F )........................................................................... 11

10. In males, sclerotized areas around bases of setae g not connected, rudimentary sclerites rEpIIa circular ( Figs. 14B , 16G ). In females, setae h1 32–38 long, slightly extending beyond free margin of interlobal membrane ( Fig. 16F )....................................................................................................... T. americana sp. n. In males, sclerotized areas around bases of setae g connected by narrow bridge, rudimentary sclerites rEpIIa teardrop-shaped ( Figs. 11B , 13G ). In females, setae h1 28–30 long, extending to free margin of interlobal membrane ( Fig. 13F )................................................................................................... T. seiurus sp. n.

11. In males, bases of setae g surrounded by small sclerotized areas, anterior ends of epimerites IVa usually bifurcate and almost extending to level of setae g ( Figs. 17B , 19G ). In females, central part of hysteronotal shield with poorly pronounced small ovate lacunae, posterior part with dash-shaped lacunae; tips of setae h1 extending distinctly beyond free margin of interlobar membrane ( Figs. 18A , 19F ).............................................................. T. helmitheros sp. n.

- In males, bases of setae g without sclerotized areas, anterior ends of epimerites IVa simple and distinctly not reaching level of setae g. In females, central and posterior parts of hysteronotal shield with well pronounced small ovate and dash-shaped lacunae, setae h1 barely extending to free margin of interlobar membrane..................... T. basieuteri Hernandes, 2014

12. Length of idiosoma in males 470–490 and in females 540–590. In males, rudimentary sclerites rEpIIa large ovate, each with a small lacuna ( Fig. 26B ). In female, posterior half of hysteronotal shield with two different types of lacunae: small narrowly ovate lacunae between levels of setae e1 and e2, and with large ovate lacunae between setae e2 and h1 ( Figs. 27A , 28F )............................................................................................. T. tigrina sp. n.

- Length of idiosoma in males 410–450 and in females 490–535. In males, rudimentary sclerites rEpIIa small ovate, without lacuna ( Fig. 23B ). In female, posterior half of hysteronotal shield with uniform lacunae ( Figs. 24A , 25F )............... 13

13. In both sexes, almost half of coxal fields II heavily sclerotized ( Figs. 29B , 30B ). In males, setae 4b posterior to level of setae cp; epimerites IVa extending to level of setae g; apophyses of adanal apodemes represented by narrow membranes with convex free margin ( Fig. 31G ). In females, hysteronotal shields 345–350 long, posterior part of hysteronotal shield usually with several (4–10) narrowly lanceolate lacunae ( Figs. 30A , 31F )......................................... T. pensylvanica sp. n.

- In both sexes, only narrow lateral area of coxal fields II heavily sclerotized ( Fig. 23B , 24B ). In males, epimerites IVa not extending to level of setae g, apophyses of adanal apodemes represented by longitudinal ridges with rounded tubercle at anterior end. In females, hysteronotal shield 315–335 long, posterior part with numerous small ovate lacunae.................. 14

14. In both sexes, setae c3 with acute apices ( Fig. 25D ). In males, inner margins of terminal lamellae slightly convex and almost touching, setae g slightly thickened in basal part ( Fig. 25G ). In females, posterior part of prodorsal shield with faint reticulate ornamentation ( Fig. 24A )................................................................... T. ruticilla sp. n.

- In both sexes, setae c3 with truncate or bidentate apices ( Fig. 22D ). In males, inner margins of terminal lamellae almost parallel-sided, setae g long filiform ( Fig. 22G ). In females, prodorsal shield without ornamentation ( Fig. 21A )...................................................................................................... T. mniotilta sp. n.

Figures

FIGURE 4. Trouessartia species, details. A—Trouessartia passerinae sp. n., opisthosoma and genital apparatus of male, ventral view, B—same, spermatheca and spermaducts, C—same, opisthosoma of female, dorsal view, D—T. capensis Berla, 1959, opisthosoma of female, dorsal view, D—T. geospiza OConnor et al. 2005, opisthosoma of female, dorsal view. Abbreviations: ae—aedeagus, ad—adanal shield, ap—apophysis of adanal apodeme, bs—basal sclerite, ea—epiandrum, bg—basal guide of external copulatory tube, gs—genital shield, hs—head of spermatheca, eh—peak-like extension of spermathecal head, pg—primary spermaduct guide, pp—postgenital plaque, pd—primary spermaduct, pm—paramere, sd—secondary spermaducts, tatranslobar apodeme, tl—terminal lamella.

FIGURE 5. Trouessartia ciris sp. n., male. A—dorsal view, B—ventral view.

FIGURE 6. Trouessartia ciris sp. n., female. A—dorsal view, B—ventral view.

FIGURE 7. Trouessartia ciris sp. n., details. A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.

FIGURE 10. Trouessartia spizellae sp. n., details. A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.

FIGURE 11. Trouessartia seiurus sp. n., male. A—dorsal view, B—ventral view.

FIGURE 13. Trouessartia seiurus sp. n., details. A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.

FIGURE 14. Trouessartia americana sp. n., male. A—dorsal view, B—ventral view.

FIGURE 16. Trouessartia americana sp. n., details.A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.

FIGURE 17. Trouessartia helmitheros sp. n., male. A—dorsal view, B—ventral view.

FIGURE 18. Trouessartia helmitheros sp. n., female.A—dorsal view, B—ventral view.

FIGURE 19. Trouessartia helmitheros sp. n., details.A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.

FIGURE 21. Trouessartia mniotilta sp. n., female. A—dorsal view, B—ventral view.

FIGURE 22. Trouessartia mniotilta sp. n., details. A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.

FIGURE 23. Trouessartia ruticilla sp. n., male. A—dorsal view, B—ventral view.

FIGURE 24. Trouessartia ruticilla sp. n., female.A—dorsal view, B—ventral view.

FIGURE 25. Trouessartia ruticilla sp. n., details. A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.

FIGURE 26. Trouessartia tigrina sp. n., male. A—dorsal view, B—ventral view.

FIGURE 27. Trouessartia tigrina sp. n., female. A—dorsal view, B—ventral view.

FIGURE 28. Trouessartia tigrina sp. n., details. A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.

FIGURE 29. Trouessartia pensylvanica sp. n., male. A—dorsal view, B—ventral view.

FIGURE 30. Trouessartia pensylvanica sp. n., female. A—dorsal view, B—ventral view.

FIGURE 31. Trouessartia pensylvanica sp. n., details. A, B—genu, tibia and tarsus I, II of male, respectively, C—tibia and tarsus IV of male, D—setae si, c2, c3 and sRIII of male, E—spermatheca and spermaducts, F—opisthosoma of female, dorsal view, G—opisthosoma and genital apparatus of male, ventral view.