Tyrannidectes cinclodes, 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 : 38-42

Tyrannidectes cinclodes sp. n.

( Figs. 21 , 22 , 23 A–E)

Type material. Male holotype ( ZISP 4660 ), 2 male and 5 female paratypes from the Dark-bellied Cinclodes Cinclodes patagonicus (Gmelin) ( Furnariidae ), CHILE: Bío Bío Region, Ñuble Province, El Carmen , 36°53'51"S 72°1'19"W, 2 February 2001, coll. D.A. González-Acuña.

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

Additional material. 1 male and 4 females, same host, CHILE: Bío Bío Region, Ñuble Province, Chillán , 36°36ʹ25ʺS 72°6ʹ11ʺW, 12 April 2003, coll. D.A. González-Acuña.

Description. MALE (holotype, range for 2 paratypes in parentheses). Idiosoma, length × width, 383 (380–390) × 164 (150–170), length of hysterosoma 244 (240–260). Prodorsal shield: 115 (115–125) × 116 (115–120), lateral margins entire, posterior margin slightly convex medially, antero-lateral extensions acute, surface with numerous circular lacunae up to 5 in diameter; scapular setae se separated by 63 (62–68) ( Fig. 21 A). Setae ve absent. Humeral shields absent. Setae c2, cp situated on soft tegument. Subhumeral setae c3 lanceolate, 20 (20–22) × 7 (6.5–7). Hysteronotal shield: greatest length 245 (245–267), width in anterior part 90 (93–104), anterior margin slightly concave, entire surface with numerous circular lacunae as in prodorsal shield. Distance between prodorsal and hysteronotal shields 22 (12–22). 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 an inverted U with strongly divergent branches, 29 (28–33) in length. Supranal concavity present, circular. Setae f2 situated anterior to bases of setae ps2. Setae h1 situated at level of supranal concavity. Setae h3 narrowly lanceolate, 26 (25–33) × 3 (3–4); setae ps2 75 (70–75) long; setae ps1 minute, filiform, about 10 long, situated on margin of terminal cleft approximately at level of setae ps2. Distance between bases of dorsal setae: c2:d2 98 (95–105), d2:e2 93 (90–95), e2:h3 56 (55–62), d1:d2 45 (40–45), e1:e2 33 (30–35), h1:ps2 27 (25–32), h2:h2 64 (62–65), h3:h3 47 (45–50), ps2:ps2 84 (82–88).

Epimerites I fused into a V (sometimes in a narrow U), fused part with short and acute lateral extensions; inner margin of epimerites II with short acute extension directed to midline ( Figs. 21 B, C). Coxal fields I, II without extensive sclerotized areas. Rudimentary sclerites rEpIIa absent. Coxal fields II, III open. Coxal fields IV without sclerotized areas. Epimerites IVa rudimentary. Genital arch of moderate size, 24 (20–24) × 47 (45–48); basal sclerite of genital apparatus with semicircular posterior margin; aedeagus sword-shaped, 95 (93–95) long, extending to anterior margin of anal suckers; genital papillae not connected by bases. Genital and adanal shields absent. Anal suckers 15 (15–16) in diameter, corolla smooth. Opisthoventral shields narrow, occupying only lateral part of opisthosoma; inner margins of these shields with finger-like extension at level of anterior part of terminal cleft; setae ps3 postero-lateral to anal suckers, approximately at level of terminal cleft bottom. Distance between ventral setae: 3b:3a 9 (8–13), 3a:4a 48 (44–48), 4a:g 44 (44–50), g:ps3 62 (60–66), ps3:ps3 88 (88–96), ps3:h3 33 (29–33).

Femora I, II with ventral crests, other segments of legs I, II without processes. Solenidion σ 1 of genu I 11 (11– 13) long, situated at midlevel of segment; genual setae cG I, II and mG I, II filiform ( Figs 23 A, B). Setae d of tarsi II subequal to corresponding setae f; setae d of tarsi III half as long as corresponding setae f. Tarsus IV 31 (30–33) long, without apical process; seta d situated in basal half of segment; solenidion φ of tibia IV extending slightly beyond tarsal apex ( Fig. 23 C).

FEMALE (5 paratypes). Idiosoma, length × width, 550–585 × 190–200, length of hysterosoma 380–400. Prodorsal shield: general form as in male, surface with small circular lacunae situated mostly in postero-median area and with a pair of large ovate lacunae near postero-lateral angles, 140–144 × 144–148, setae se separated by 84–88 ( Fig. 22 A). Setae ve absent. Humeral shields rudimentary, represented by tiny sclerites anterior to bases of setae cp. Setae c2 and cp situated on soft tegument. Setae c3 lanceolate, 22–25 × 7–8. Distance between prodorsal and hysteronotal shields 12–15. Anterior and lobar parts of hysteronotal shield separated dorsally by transverse band of soft tegument, but remain connected ventro-laterally ( Fig. 22 B). Anterior hysteronotal shields roughly rectangular, anterior margin straight, greatest length 275–308, width at anterior margin 135–145, whole surface with numerous circular lacunae. Length of lobar region 110–115, greatest width 108–115. Supranal concavity circular, heavily outlined. Terminal cleft as a narrow V, extending beyond level of setae h2, 72–75 long, width at level of lobar apices 25–28. Setae h1 on lobar shield, slightly posterior to supranal concavity; setae h1 and f 2 in low trapezoid arrangement. Setae h2 spindle-like, 47–51 × 8–9. Setae ps1 near inner margins of opisthosomal lobes. Setae h3 13–15 long, about 1/8–1/10 of terminal appendages. Distance between dorsal setae: c2:d2 113–125, d2:e2 130–135, e2:h2 80–93, h2:h3 47–49, d1:d2 48–57, e1:e2 47–49, h1:h2 31–37, h1:h1 37–42, h2:h2 80–88.

Epimerites I fused into a V; fused part without lateral extensions ( Fig. 22 B). Lateral parts of coxal fields I, II without large sclerotized areas. Epimerites IVa absent. Translobar apodemes of opisthosomal lobes present, wide, not fused to each other anterior to terminal cleft. Epigynum with little ledges on lateral margins, greatest width 78– 82; apodemes of oviporus not fused with epimerites IIIa. Pseudanal setae ps2, ps3 filiform, minute, arranged in transverse rectangle and situated approximately at midlevel of anal opening, distance between setae: ps2:ps2 44– 49, ps3:ps3 42–46, ps2:ps3 11–12. Primary spermaduct thickened in proximal part and with small ball-like enlargement (about 10 from head of spermatheca); secondary spermaducts 20–25 long, approximately twice as long as thickened part of primary spermaduct ( Fig. 23 E).

Femur I without ventral crest, femur II with narrow ventral crest, other segments of these legs as in male. Solenidion σ 1 of genu I, 14–16 long, situated at midlevel of segment. Genual setae cG I, II and mG I, II filiform. Setae d of tarsi II subequal to corresponding setae f, setae d of tarsi III, IV shorter than corresponding setae f. Genu IV with narrow dorsal crest in proximal part ( Fig. 23 D), genu III without noticeable dorsal crest.

Differential diagnosis. Tyrannidectes cinclodes sp. n. belongs to the reticulatus species group, and appears closest to T. reticulatus ( Černý, 1974) described from Elaenia flavogaster (Thunberg) (Tyrannidae) in Surinam and Brazil ( Černý 1974; Valim & Hernandes 2010) by having the entire lobar shield with strongly sclerotized supranal concavity in females. Nevertheless, T. cinclodes is well distinguished from that species and also from other representatives of this group, T. anairetes , T. banksi and T. berlai , by the following characters. In both sexes of T. cinclodes , the prodorsal and hysteronotal shields are entirely covered with numerous circular lacunae; in males, the aedeagus extends to the midlevel of anal suckers, and setae h3 are approximately as long as the distance between their bases; in females, pairs of setae ps2 and ps3 are close to each other and both are situated approximately at the midlevel of the anal opening. In both sexes of T. reticulatus , the prodorsal shield is monotonously punctuate and devoid of pattern, while the hysteronotal shield has a reticulate pattern; in males, the aedeagus does not extend to the anterior margin of anal suckers, and setae h3 are half as long as the distance between their bases; in females, setae ps2 are far posterior to setae ps3, and only the latter pair is situated at the level of anal opening. The position of setae ps2 and ps 3 in T. cinclodes females coincides to that in the fissuratus species group ( Fig. 20 B) however these setae retain the structure of true filiform setae ( Fig. 22 B). That indicates a possible affinity of T. cinclodes with the ancestors of the fissuratus group.

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

Figures

FIGURE 20. Tyrannidectes falcklandicus sp. n., female. A — dorsal view, B — ventral view.

FIGURE 21. Tyrannidectes cinclodes sp. n., male. A — dorsal view, B — ventral view, C — variant of epimerites I.

FIGURE 22. Tyrannidectes cinclodes sp. n., female. A — dorsal view, B — ventral view.

FIGURE 23. Tyrannidectes and Metapterodectes species, details. A – E — Tyrannidectes cinclodes sp. n., F – K — Metapterodectes leptasthenurae 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 – H — legs I – III of male, I — tibia and tarsus IV of male, J — femur and genu IV of female, Kspermatheca and spermaducts.