Pterodectes tangarae Mironov, 2008

Mironov, Sergey V., Literak, Ivan & Čapek, Miroslav, 2008, New feather mites of the subfamily Pterodectinae (Acari: Astigmata: Proctophyllodidae) from passerines (Aves: Passeriformes) in Mato Grosso do Sul, Brazil, Zootaxa 1947, pp. 1-38 : 9-13

Pterodectes tangarae Mironov sp. n.

( Figs. 4–6)

Type material. Male holotype ( ZISP 4377 ), 7 male and 3 female paratypes ex Tangara cayana (Linnaeus, 1766) (Thraupidae) , Brazil, Mato Grosso do Sul, Nova Andradina, 22° 15’ S, 53° 21’ W, 17 July, 2006, I. Literak and M. Č apek. Holotype, 3 male and 1 female paratypes ( ZISP 4377 - 4381 ) – ZISP, remaining paratypes – PaU.

Male (holotype, measurements for 7 paratypes in parenthesis). Idiosoma, length × width, 360 (360–375), 160 (150–165), length of hysterosoma 230–240. Prodorsal shield: 115 (115–120) × 118 (115–120), lateral margins entire, posterior margin slightly convex, antero-lateral extensions rounded, posterior 2/3 of surface with sparse, little pit-like lacunae; scapular setae se separated by 64 (55–65) ( Fig. 4A). Setae ve present. Humeral shields narrow, situated laterally, separated from epimerites III. Setae cp situated on soft tegument, mesal from ventral margin of humeral shields. Setae c2 situated on soft tegument, slightly anterior to humeral shields. Subhumeral setae c3 lanceolate, 26 (25–28) × 7 (7–8). Hysteronotal shield: greatest length 236 (235– 245), width in anterior part 110 (105–115), anterior margin slightly concave, middle part of shield with sparse little pit-like lacunae. Distance between prodorsal and hysteronotal shields along midline 17 (13–20). Opisthosomal lobes approximately as long as wide at base; posterior ends of lobes roughly rounded, with short and blunt extensions bearing bases of setae h2 and h3 and usually forming two teeth on lobar apices. Terminal cleft as an inverted U with widely divergent branches, 51 (44–51) in length. Supranal concavity present. Setae f2 situated anterior to bases of ps2. Setae h1 situated at level of supranal concavity. Setae h3 narrowly lanceolate, 42 (40–45) × 3.5 (3–4); setae ps2 93 (85–95) long; setae ps1 minute, filiform, 7 (6–7) long, situated on margins of terminal cleft, approximately at level of setae ps2. Distance between dorsal setae: se:c2 70 (70–75), c2:d2 90 ((85–95), d2:e2 84 (80–90), e2:h3 50 (45–55), d1:d2 44 (40–45), e1: e2 26 (25– 35), h1:ps2 24 (20–25), h2:h2 66 (60–70), h3:h3 50 (45–52), ps2:ps2 78 (70–80).

Epimerites I fused into a V, fused part with short and acute lateral extensions ( Fig. 4 B). Coxal fields I, II without extensive sclerotized areas; inner margin of epimerites II with short acute extension. Rudimentary sclerites rEpIIa absent. Coxal fields II, III open. Epimerites IVa absent. Genital arch of moderate size, 20 (18– 22) × 40 (40–42); basal sclerite of genital apparatus with concave posterior margin; aedeagus straight, sword- shaped, 82 (80–85) long, extending to anterior end of anal opening. Genital papillae at level of genital arch apex. Genital and adanal shields absent. Anal suckers 15 (14–15) in diameter, corolla smooth. Opisthoventral shields wide, occupy postero-lateral half of lobes; inner margins of these shields with tooth-like extension at level of setae f2 and with setae ps3 at midlevel of anal suckers. Distance between ventral setae: 3b:3a 10 (5– 11), 3a:4a 40 (35–42), 4a:g 38 (35–40), g:ps3 60 (55–60), ps3:ps3 65 (60–66), ps3:h3 33 (30–38).

Femora I, II with narrow ventral crests, other segments of legs I, II without processes. Solenidion σ 1 of genu I short, stick-like, 11 (10–12) long, situated at midlevel of segment; genual setae cG I, II, mG I, II seti- form ( Figs 5 A, B). Solenidion σ 1 of genu III in distal part of segment. Setae d of tarsi II, III shorter than corresponding setae f. Tarsus IV 24 (22–25) long, with small apical claw-like process; seta d minute, stick-like, situated slightly closer to apex than base of segment; seta e button-like, situated at base of apical claw; solenidion ϕ of tibia IV extending to midlevel of ambulacral disc ( Fig. 4 D).

Female (2 paratypes). Idiosoma, length × width, 515–530 × 180–195, length of hysterosoma 355–370. Prodorsal shield: general form as in male, 130–135 × 135–145, setae se separated by 75–80 ( Fig. 6 A). Setae ve present. Humeral shields narrow, separated from epimerites III. Setae cp situated on soft tegument near ventral margin of humeral shields. Setae c2 situated near to anterior ends of humeral shields. Setae c3 lanceolate, 28–32 × 7–9. Distance between prodorsal and hysteronotal shields 15–20. Anterior and lobar pieces of hysteronotal shield separated dorsally by narrow transverse band of soft tegument, but remain connected ventro-laterally ( Fig. 6 B). Anterior hysteronotal shield: slightly enlarged in anterior part, anterior margin almost straight, greatest length 275–280, width at anterior margin 130–145, anterior half of shield with little pit-like lacunae, posterior half with circular lacunae about 5 in diameter. Length of lobar region 95–105, greatest width 95–102, anterior part with circular lacunae. Lobar shield split into two halves by narrow median furrow. Terminal cleft as a narrow inverted V, 65–75 long, distance between lobar apices 22–30. Setae h1 on lobar shield, distant from anterior margins; setae h1 and f 2 in trapezoid arrangement. Setae h2 spindle-like, 45–55 × 7–9. Setae ps1 near to inner margins of opisthosomal lobes. Setae h3 20–28 long, about 1/6 of terminal appendages. Distance between dorsal setae: se:c2 84–95, c2:d2 110–115, d2:e2 125–130, e2:h2 60–70, h2:h3 40–50, d1:d2 35–50, e1: e2 30–45, h1:h2 35–40, h1:h1 25–30, h2:h2 75–80, h3:h3 40–50.

Epimerites I fused into a V, fused par with acute posterior end and without lateral extension. Lateral parts of coxal fields I, II without extensive sclerotized areas ( Fig. 6 B). Epimerites IVa absent. Translobar apodemes of opisthosomal lobes present, not fused to each other anterior to terminal cleft. Epigynum with short lateral extensions, greatest width 70–75. Pseudanal setae setiform, distance between setae: ps2:ps2 50–58, ps3:ps3 20–30, ps2:ps3 20–28. Head of spermatheca as in Fig. 5 G; primary spermaduct with long but poorly expressed enlargement (about 30 long) in proximal part; secondary spermaducts slightly longer than enlargement of primary spermaduct, 30–35 long; copulatory opening ventral, slightly posterior to anus.

Legs I, II as in male. Solenidion σ 1 of genu I thin stick-like, 13–17 long; genual setae cG I, II mG I, II setiform. Setae d of tarsi II–IV shorter than corresponding setae f. Genu IV dorsally inflated, with wide longitudinal dorsal crest, genu III with low longitudinal dorsal crest ( Figs. 6 E, F).

Differential diagnosis. Like P. paroariae sp. n., P. tangarae sp. n. is most similar to P. atyeoi by having extensive ventral sclerotization of opisthosomal lobes and narrowly lanceolate setae h 3 in males ( Fig. 4 B) and differs from the latter species by the characters as follows. In males of P. tangarae , little pit-like lacunae occupy the central part of hysteronotal shield, the anterior margin of the hysteronotal shield is slightly concave, and epimerites IVa are absent; in females, the humeral shields are present, the anterior hysteronotal and lobar shields are connected ventro-laterally ( Fig. 6 B). In males of P. ateyoi , little pit-like lacunae of hysteronotal shield are generally present in its posterior third, the anterior margin of hysteronotal shield is straight, epimerites IVa are large and their inner ends touch the tips of genital arch; in females, the humeral shields are absent, anterior and lobar hysteronotal shields are completely separated.

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