Amerodectes contopus, 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 : 18-21

Amerodectes contopus sp. n.

( Figs. 8 F–J, 9, 10)

Type material. Male holotype ( ZISP 4607 ), 3 male and 4 female paratypes from the Eastern Wood Pewee Contopus virens (Linnaeus) (Tyrannidae) , CUBA: Habana, 23°6'52"N 82°23'1"W, 23 October 2007, coll. D.A. González-Acuña.

Type depository. Holotype, 2 male and 3 female paratypes—ZISP, remaining paratypes—DGA.

Description. MALE (holotype, range for 3 paratypes in parentheses). Idiosoma, length × width, 365 (340–365) × 133 (130–140), length of hysterosoma 235 (214–235). Prodorsal shield: 106 (98–106) × 98 (95–106), lateral margins entire, posterior margin straight, antero-lateral extensions acute, surface with numerous small circular lacunae; scapular setae se separated by 55 (55–58) ( Fig. 9 A). Setae ve absent. Humeral shields absent. Setae c2 and cp situated on striated tegument. Subhumeral setae c3 lanceolate, 22 (21–22) × 7 (7–9). Hysteronotal shield: greatest length 245 (220–245), width in anterior part 95 (95–100), anterior margin straight or slightly concave, median area with very small circular lacunae. Distance between prodorsal and hysteronotal shields 7 (7–15). Opisthosomal lobes approximately as long as wide at base; posterior margin 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, 24 (24– 28) in length. Supranal concavity present, semicircular. Setae f2 situated anterior to bases of setae ps2. Setae h1 situated anterior to supranal concavity. Setae h3 narrowly lanceolate, 22 (20–22) × 3 (3–4); setae ps2 62 (60–65) long; setae ps1 minute, about 10 long, situated on margins of terminal cleft approximately at level of setae ps2. Distance between bases of dorsal setae: c2:d2 93 (85–95), d2:e2 105 (80–105), e2:h3 60 (50–60), d1:d2 37 (28–38), e1:e2 20 (20–28), h1:ps2 31 (28–35), h2:h2 55 (52–55), h3:h3 42 (38–42), ps2:ps2 69 (66–70).

Epimerites I fused into a V, fused part with acute posterior end and with narrow lateral extensions connected to medial parts of epimerites II (in some specimens these bands interrupted) ( Fig. 9 B). 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 absent. Genital arch of medium size, 22 (22–24) × 46 (44–46); basal sclerite of genital apparatus with rounded posterior margin; aedeagus straight, 105 (93–105) long, extending to anterior end of terminal cleft; genital papillae connected by bases. Genital and adanal shields absent. Anal suckers 12 (12–13) in diameter, corolla smooth. Opisthoventral shields wide, occupying posterior half of lobes and lateral parts of opisthosoma, inner margins of these shields with blunt extension at level of anal suckers; setae ps3 on these extensions. Distance between ventral setae: 3b:3a 9 (7–10), 3a:4a 44 (40–45), 4a:g 42 (37–42), g:ps3 49 (45–50), ps3:ps3 60 (55–60), ps3:h3 37 (30–35).

Femora I, II with ventral crests, other segments of legs I, II without processes. Solenidion σ 1 of genu I 17 (15– 17) long, situated at midlevel of segment or slightly basally; genual setae cG I, II and mG I, II filiform ( Figs. 8 F, G). Setae d of tarsi II, III half as long as corresponding setae f. Tarsus IV 27 (24–27) long, without apical process; seta d situated at midlevel of segment; solenidion φ of tibia IV extending to midlevel of ambulacral disc ( Fig. 8 H).

FEMALE (4 paratypes). Idiosoma, length × width, 510–520 × 165–170, length of hysterosoma 355–375. Prodorsal shield: general form and surface as in male except for slightly concave posterior margin, 128–133 × 133– 135, setae se separated by 66–72. Setae ve absent. Humeral shields absent. Setae c2 and cp situated on soft tegument. Setae c3 lanceolate, 14–15 × 7–8. Distance between prodorsal and hysteronotal shields 15–25. Anterior and lobar parts of hysteronotal shield separated dorsally by narrow transverse band of soft tegument, but remain connected ventro-laterally ( Figs. 10 A). Anterior hysteronotal shields noticeably attenuate posteriorly, anterior margin slightly concave, greatest length 270–285, width at anterior margin 130–135, posterior part with little circular lacunae as on prodorsal shield. Lobar region strongly constricted anterior to level of setae h2, length of region 93–97, greatest width 76–82; posterior margin of lobar shield with deep and narrow incision, lateral parts of this shield connected to each other by narrow transverse band. Terminal cleft shaped as very narrow V, anterior end extending far beyond level of setae h2, 64–66 long, width at level of lobar apices 11–14. Setae h1 on lobar shield, far distant from its anterior margins; setae h1 and f 2 in low trapezoid arrangement. Setae h2 spindle-like, 58–60 × 7–9. Setae ps1 on inner margins of opisthosomal lobes. Setae h3 12–14 long, about 1/8 of terminal appendages. Distance between dorsal setae: c2:d2 105–125, d2:e2 118–138, e2:h2 66–68, h2:h3 42–44, d1:d2 40–45, e1:e2 32–35, h1:h2 25–30, h1:h1 26–28, h2:h2 60–62.

Epimerites I fused into a Y with very short sternum; without lateral extensions. Lateral parts of coxal fields I, II with large sclerotized areas ( Fig. 10 B). Epimerites IVa absent. Translobar apodemes of opisthosomal lobes present, wide, not fused each other anterior to terminal cleft. Epigynum without lateral extensions, greatest width 62–66; the apodemes of oviporus fused with epimerites IIIa. Pseudanal setae ps2, ps3 filiform, setae ps2 posterior to anal opening, distance between setae: ps2:ps2 33–42, ps3:ps3 17–20, ps2:ps3 30–40. Primary spermaduct with very short conical enlargement in proximal part and with long enlargement in distal part (bursa copulatrix); well sclerotized part of secondary spermaducts 5–8 long ( Fig. 8 J).

Femora I, II with ventral crest, other segments of these legs without processes. Solenidion σ 1 of genu I 18–20 long, situated 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 narrow longitudinal dorsal crest ( Fig. 8 I), genu III without dorsal crest.

Differential diagnosis. Amerodectes contopus sp. n. is most similar to A. wilsoniae described above by the absence of humeral shields in both sexes and by having short and lanceolate setae h3 (shorter than distance between their bases) and in having an aedeagus extending beyond the level of anal suckers in males. Amerodectes contopus differs from A. wilsoniae by the following features: in males, the prodorsal shield has numerous circular lacunae, fused tips of epimerites I are connected with epimerites II or at least with a pair of acute extensions directed laterally, and the aedeagus extends to the anterior end of terminal cleft; in females, the lobar shield is almost completely split by median band of soft tegument and its pieces remain connected by only narrow transverse band at the very anterior margin of the shield ( Fig. 10 A). In males of A. wilsoniae , the prodorsal shield has no lacunae at all or small dash-like lacunae are present in its anterior part, epimerites I form a short and acute sternum without any lateral extensions, and the aedeagus extends slightly beyond the anterior end of terminal cleft; in females, the lobar shield is completely split by median band of soft tegument.

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

Figures

FIGURE 8. Amerodectes species, details. A – E — Amerodectes wilsoniae sp. n., F – J — A. contopus 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.

FIGURE 9. Amerodectes contopus sp. n., male. A — dorsal view, B — ventral view.

FIGURE 10. Amerodectes contopus sp. n., female. A — dorsal view, B — ventral view.