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

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http://doi.org/ 10.11646/zootaxa.3057.1.1



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scientific name

Tyrannidectes cinclodes

sp. n.

Tyrannidectes cinclodes   sp. n.

( Figs. 21 View FIGURE 21 , 22 View FIGURE 22 , 23 View FIGURE 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. GoogleMaps  

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 ° 36 ʹ 25 ʺS 72 ° 6 ʹ 11 ʺW, 12 April 2003, coll. D.A. González-Acuña. GoogleMaps  

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 View FIGURE 21 A). Setae ve absent. Humeral shields absent. Setae c 2, cp situated on soft tegument. Subhumeral setae c 3 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 h 2 and h 3. Terminal cleft shaped as an inverted U with strongly divergent branches, 29 (28–33) in length. Supranal concavity present, circular. Setae f 2 situated anterior to bases of setae ps 2. Setae h 1 situated at level of supranal concavity. Setae h 3 narrowly lanceolate, 26 (25–33) × 3 (3–4); setae ps 2 75 (70–75) long; setae ps 1 minute, filiform, about 10 long, situated on margin of terminal cleft approximately at level of setae ps 2. Distance between bases of dorsal setae: c 2:d 2 98 (95–105), d 2:e 2 93 (90–95), e 2:h 3 56 (55–62), d 1:d 2 45 (40–45), e 1:e 2 33 (30–35), h 1:ps 2 27 (25–32), h 2:h 2 64 (62–65), h 3:h 3 47 (45–50), ps 2:ps 2 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 View FIGURE 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 ps 3 postero-lateral to anal suckers, approximately at level of terminal cleft bottom. Distance between ventral setae: 3 b: 3a 9 (8–13), 3 a: 4a 48 (44–48), 4 a:g 44 (44–50), g:ps 3 62 (60–66), ps 3:ps 3 88 (88–96), ps 3:h 3 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 View FIGURE 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 View FIGURE 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 View FIGURE 22 A). Setae ve absent. Humeral shields rudimentary, represented by tiny sclerites anterior to bases of setae cp. Setae c 2 and cp situated on soft tegument. Setae c 3 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 View FIGURE 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 h 2, 72–75 long, width at level of lobar apices 25–28. Setae h 1 on lobar shield, slightly posterior to supranal concavity; setae h 1 and f 2 in low trapezoid arrangement. Setae h 2 spindle-like, 47–51 × 8–9. Setae ps 1 near inner margins of opisthosomal lobes. Setae h 3 13–15 long, about 1 / 8 – 1 / 10 of terminal appendages. Distance between dorsal setae: c 2:d 2 113–125, d 2:e 2 130–135, e 2:h 2 80–93, h 2:h 3 47–49, d 1:d 2 48–57, e 1:e 2 47–49, h 1:h 2 31–37, h 1:h 1 37–42, h 2:h 2 80–88.

Epimerites I fused into a V; fused part without lateral extensions ( Fig. 22 View FIGURE 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 ps 2, ps 3 filiform, minute, arranged in transverse rectangle and situated approximately at midlevel of anal opening, distance between setae: ps 2:ps 2 44– 49, ps 3:ps 3 42–46, ps 2:ps 3 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 View FIGURE 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 View FIGURE 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 h 3 are approximately as long as the distance between their bases; in females, pairs of setae ps 2 and ps 3 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 h 3 are half as long as the distance between their bases; in females, setae ps 2 are far posterior to setae ps 3, and only the latter pair is situated at the level of anal opening. The position of setae ps 2 and ps 3 in T. cinclodes   females coincides to that in the fissuratus   species group ( Fig. 20 View FIGURE 20 B) however these setae retain the structure of true filiform setae ( Fig. 22 View FIGURE 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.


Royal British Columbia Museum - Herbarium