Tyrannidectes anairetes, Mironov & González-Acuña, 2011

Mironov, Sergey & González-Acuña, Daniel, 2011, New feather mites of the subfamily Pterodectinae (Acariformes: Proctophyllodidae) from passerines (Aves: Passeriformes) from Chile and Cuba, Zootaxa 3057, pp. 1-48 : 30-34

Tyrannidectes anairetes sp.n.

( Figs. 16 , 17 , 18 A–E)

Type material. Male holotype ( ZISP 4633 ), 5 male and 5 female paratypes from the Tufted Tit-tyrant Anairetes parulus (Kittlitz) ( Tyrannidae ), CHILE: Bío Bío Region, Ñuble Province, Santa Elena , 36º48'14"S 72º23'04"W, 7 December 2006, coll. D.A. González-Acuña.

Type depository. Holotype, 4 male and 4 female paratype—ZISP, remaining paratypes—DGA.

Additional material. 3 male and 7 female paratypes, same host, CHILE: Bío Bío Region, Bío Bío Province, Santa Barbara , 37°39'53"S 72°1'13"W, 11 November 2006, coll. D.A. González-Acuña.

Description. MALE (holotype, range for 5 paratypes in parentheses). Idiosoma, length × width, 360 (340–360) × 144 (130–145), length of hysterosoma 230 (220–235). Prodorsal shield: 113 (110–115) × 115 (110–115), lateral margins entire, posterior margin straight, antero-lateral extensions short and rounded, surface without pattern; scapular setae se separated by 62 (60–65) ( Fig. 16 A). Setae ve absent. Humeral shields absent. Setae c2, cp situated on soft tegument. Subhumeral setae c3 lanceolate, 24 (22–24) × 7 (7–8). Hysteronotal shield: greatest length 235 (220–236), width in anterior part 104 (100–104), anterior margin straight or slightly concave, entire surface without pattern. Distance between prodorsal and hysteronotal shields 7 (7–10). Opisthosomal lobes approximately as long as wide at base; posterior ends of lobes roughly rounded, with short and blunt extensions at bases of setae h2 and h3. Terminal cleft shaped as a wide inverted U with strongly divergent branches, 17 (16–20) in length. Supranal concavity present, circular. Setae f2 absent. Setae h1 situated at level of supranal concavity. Setae h3 spiculiform, slightly curved, 12 (12–15) long; setae ps2 65 (62–68) long; setae ps1 minute, about 10 long, situated near margin of terminal cleft approximately at level of setae ps2. Distance between bases of dorsal setae: c2:d2 97 (92– 100), d2:e2 93 (90–96), e2:h3 40 (34–40), d1:d2 33 (26–33), e1:e2 37 (35–40), h1:ps2 26 (16–26), h2:h2 60 (60– 62), h3:h3 42 (42–48), ps2:ps2 71 (70–75).

Epimerites I fused into a Y, with short and acute sternum and a pair of short tooth-like lateral extensions; epimerites II with short obtuse-angular extension on inner margin ( Fig. 16 B). Coxal fields I, II without extensive sclerotized areas. Rudimentary sclerites rEpIIa absent. Coxal fields I–III open. Coxal fields IV without sclerotized areas. Epimerites IVa absent. Genital arch of moderate size, 20 (20–22) × 42 (40–44); basal sclerite of genital apparatus with rounded posterior margin; aedeagus sword-shaped, 69 (67–70) long, nearly extending to anterior margin of anal suckers; genital papillae not connected by bases. Genital and adanal shields absent. Anal suckers 13 (11–13) in diameter, corolla smooth. Opisthoventral shields narrow, developed only along lateral margins of opisthosoma; inner margins of these shields with acute extension approximately at midlevel of terminal cleft. Setae ps3 situated at level of posterior margins of anal suckers, almost on lateral margins of opisthosoma. Distance between ventral setae: 3b:3a 10 (10–12), 3a:4a 42 (40–44), 4a:g 46 (42–46), g:ps3 50 (50–54), ps3:ps3 84 (82–86), ps3:h3 22 (17– 22).

Femora I, II with ventral crests, other segments of legs I, II without processes. Solenidion σ 1 of genu I 17 (13– 17) long, situated at midlevel of segment; genual setae cG I, II and mG I, II setiform ( Figs. 18 A, B). Setae d of tarsi II, III shorter than corresponding setae f. Tarsus IV 25 (22–25) long, without apical process; seta d situated slightly closer to base than to apex of segment; solenidion φ of tibia IV extending to midlevel of ambulacral disc ( Fig. 18 C).

FEMALE (6 paratypes). Idiosoma, length × width, 475–490 × 160–175, length of hysterosoma 345–355. Prodorsal shield: 120–125 × 126–140, lateral margins with incisions extending to bases of setae se, antero-lateral extensions short and bluntly rounded, posterior margin with short and blunt median extension, surface without pattern; scapular setae se separated by 75–78. ( Fig. 17 A) Setae ve absent. Humeral shields absent. Setae c2 and cp situated on soft tegument. Setae c3 lanceolate, 22–24× 7–8. Distance between prodorsal and hysteronotal shields 20– 25. Anterior and lobar parts of hysteronotal shield separated dorsally by narrow transverse band of soft tegument, but remain connected ventro-laterally ( Fig. 17 B). Anterior hysteronotal shield almost rectangular, anterior margin slightly concave, greatest length 255–272, width at anterior margin 115–135, surface without pattern. Length of lobar region 92–95, greatest width 86–90. Supranal concavity circular. Terminal cleft as a narrow U, extending to level of setae h2, 53–60 long, width at level of lobar apices 7–9. Setae h1 on lobar shield, approximately at level of supranal concavity. Setae f2 absent. Setae h2 spindle-like, 44–48 × 8–9. Setae ps1 closer to inner margins of opisthosomal lobes than to outer one. Setae h3 10–14 long, about 1/8th the length of terminal appendages. Distance between dorsal setae: c2:d2 112–115, d2:e2 125–130, e2:h2 42–48, h2:h3 48–52, d1:d2 34–44, e1:e2 42–45, h1:h2 25–27, h1:h1 30–35, h2:h2 68–72.

Epimerites I fused into a Y, sternum short and acute, without lateral extensions ( Fig. 17 B). Lateral parts of coxal fields II without large sclerotized areas. Epimerites IVa absent. Translobar apodemes of opisthosomal lobes present, narrow, not fused to each other anterior to terminal cleft. Epigynum with poorly developed lateral extensions in posterior part, greatest width 64–66; apodemes of oviporus fused with epimerites IIIa. Pseudanal setae ps2, ps3 filiform, setae ps2 situated posterior to anal opening and widely separated from each other, distance between setae: ps2:ps2 60–65, ps3:ps3 32–35, ps2:ps3 28–34. Primary spermaduct with poorly developed enlargement in proximal part near head of spermatheca; secondary spermaducts 20–25 long, slightly longer than enlargement of primary spermduct ( Fig. 18 E).

Femur I without crest, femur II with ventral crest, other segments of these legs without processes. Solenidion σ 1 of genu I 13–16 long, situated approximately at midlevel of segment. Genual setae cG I, II and mG I, II filiform. Setae d of tarsi II–IV shorter than corresponding setae f. Genu IV dorsally inflated, with low longitudinal dorsal crest ( Fig. 18 D), genu III without dorsal crest.

Differential diagnosis. Among previously known species, males of Tyrannidectes anairetes sp. n. are most similar to those of T. berlai Mironov, 2008 described from Myiarchus tyrranulus (Müller) (Tyrannidae) in Brazil by having short setae h3 (length less than half the distance between their bases) and by the absence of any pattern on dorsal shields. The new species differs from T. berlai by the following features: in both sexes setae f2 are absent, the anterior margin of hysteronotal shield is straight or slightly concave, and fused epimerites I form a short sternum; in males, setae h3 are spiculiform; in females, the lobar shield is entire and the hysteronotal shields has no any pattern. In both sexes of T. berlai , setae f2 are present, the anterior margin of hysteronotoal shield has a deep concavity extending to the level of humeral setae cp, and epimerites I are fused into a narrow U; in males, setae h3 are narrowly lanceolate; in females, the lobar shield is almost completely separated along median line into two pieces and the anterior hysteronotal shield bears oblique and sparse striae in lateral areas. The loss of setae f 2 in T. anairetes also distinguishes this species from all other known Tyrannidectes species including new ones described in the present paper.

Etymology. The specific epithet derives from the generic name of the type host and is a noun in apposition.

Figures

FIGURE 16. Tyrannidectes anairetes sp. n., male. A — dorsal view, B — ventral view.

FIGURE 17. Tyrannidectes anairetes sp. n., female. A — dorsal view, B — ventral view.

FIGURE 18. Tyrannidectes species, details. A – E — Tyrannidectes anairetes sp. n., F – J — T. falcklandicus sp. n. A, B — legs I – II of male, C — tibia and tarsus IV of male, D — femur and genu IV of female, E — spermatheca and spermaducts, F, G — legs I, II of male, H — tibia and tarsus IV of male, I — femur and genu IV of female, J — spermatheca and spermaducts.