Amerodectes wilsoniae, 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 : 14-18

Amerodectes wilsoniae sp. n.

( Figs. 6 , 7 , 8 A–E)

Type material. Male holotype ( ZISP 4599 ), 5 male and 4 female paratypes from the Hooded Warbler Wilsonia citrina (Boddaert) (Parulidae) , CUBA: Habana, 23°6'52"N 82°23'1"W, 16 October 2007, coll. D.A. González-Acuña.

Type depository. Holotype, 4 male and 3 female paratypes—ZISP, remaining paratypes—DGA.

Description. MALE (holotype, range for 5 paratypes in parentheses). Idiosoma, length × width, 325 (322– 345) × 122 (120–126), length of hysterosoma 215 (215–235). Prodorsal shield: 98 (92–100) × 100 (100–108), lateral margins entire, posterior margin almost straight, antero-lateral extensions acute, surface monotonously punctate; scapular setae se separated by 51 (48–51) ( Fig. 6 A). Setae ve represented by alveoli, scarcely distinct. Humeral shields absent. Setae c2, cp situated on soft tegument. Subhumeral setae c3 lanceolate, 22 (22–24) × 7 (7– 8). Hysteronotal shield: greatest length 223 (220–235), width in anterior part 93 (90–95), anterior margin straight, most surface without pattern, posterior one third sometimes with small pit-like lacunae. Distance between prodorsal and hysteronotal shields 7 (7–12). 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 slightly divergent branches, 30 (25–30) in length. Supranal concavity poorly distinct, semicircular. Setae f2 situated anterior to bases of setae ps2. Setae h1 situated approximately at level of supranal concavity. Setae h3 narrowly lanceolate, 22 (21–23) × 3 (3–4); setae ps2 70 (68–80) long; setae ps1 minute, filiform, about 5 long, situated near margin of terminal cleft, slightly anterior to level of setae ps2. Distance between bases of dorsal setae: c2:d2 84 (80–90), d2:e2 82 (80–84), e2:h3 48 (45–52), d1:d2 24 (24–32), e1:e2 26 (24–27), h1:ps2 24 (24–26), h2:h2 53 (52–60), h3:h3 35 (35–44), ps2:ps2 64 (62–74).

Epimerites I fused into a Y; sternum short, with acute posterior end and without lateral extensions ( Fig. 6 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, with strongly divergent branches, 23 (22–24) × 39 (35–42); basal sclerite of genital apparatus with rounded posterior margin; aedeagus sword-shaped, 98 (95–103) long, extending to anterior end of terminal cleft or slightly beyond it; genital papillae not connected by bases. Genital and adanal shields absent. Anal suckers 14 (13–14) in diameter, corolla smooth. Opisthoventral shields wide, occupying distal half of lobes and area lateral to anal field; inner margins of these shields with trapezium-like extensions at level of anal suckers; setae ps3 situated on these extensions, at level of posterior margin of anal suckers. Distance between ventral setae: 3b:3a 12 (9–14), 3a:4a 42 (40–44), 4a:g 42 (40–42), g:ps3 46 (46–48), ps3:ps3 55 (54–57), ps3:h3 31 (30–32).

Femora I, II with narrow ventral crests, other segments of legs I, II without processes. Solenidion σ 1 of genu I 14 (13–14) long, situated at midlevel of segment; genual setae cG I, II and mG I, II filiform ( Figs. 8 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 26 (26–28) long, without apical process; seta d situated approximately at midlevel of segment; solenidion φ of tibia IV extending almost to midlevel of ambulacral disc ( Fig. 8 C).

FEMALE (4 paratypes). Idiosoma, length × width, 475–505 × 135–145, length of hysterosoma 345–365. Prodorsal shield: general form as in male, surface with numerous small circular lacunae, 130–136 × 122–125, setae se separated by 62–66 ( Fig. 7 A). Setae ve represented by alveoli as in male. Humeral shields absent. Setae c2, cp situated on soft tegument. Setae c3 lanceolate, 22–26 × 7–8. Distance between prodorsal and hysteronotal shields 9– 15. Anterior and lobar parts of hysteronotal shield separated dorsally by narrow transverse band of soft tegument, but remain connected ventro-laterally ( Fig. 7 B). Anterior hysteronotal shields attenuate posteriorly, anterior margin slightly concave, greatest length 250–265, width at anterior margin 120–125, median part with numerous circular lacunae, in posterior quarter these lacunae well outlined and most large in size (up to 4 in diameter). Length of lobar region 90–95, greatest width 76–80; lobar shield split longitudinally by median band of soft tegument 7–10 wide. Supranal concavity off lobar shield, poorly distinct. Terminal cleft shaped as a narrow V, extending beyond level of setae h2, 60–66 long, width at level of lobar apices 9–15. Setae h1 on lobar shield pieces, posterior to level of supranal concavity; setae h1 and f2 arranged in low trapezium. Setae h2 spindle-like, 42–47 × 7–8.5. Setae ps1 near inner margins of opisthosomal lobes. Setae h3 10–12 long, about 1/6 of terminal appendages. Distance between dorsal setae: c2:d2 110–115, d2:e2 110–117, e2:h2 70–72, h2:h3 40–49, d1:d2 35–42, e1:e2 33–37, h1:h2 24–32, h2:ps1 20–22, h1:h1 28–32, h2:h2 58–60.

Epimerites I fused into a Y, sternum short, without lateral extensions. Lateral parts of coxal fields I, II without large sclerotized areas ( Fig. 7 B). Epimerites IVa absent. Translobar apodemes of opisthosomal lobes present, narrow, not fused to each other anterior to terminal cleft. Epigynum with small lateral extensions in posterior one third, greatest width 58–62; apodemes of oviporus fused with epimerites IIIa. Pseudanal setae ps2, ps3 filiform, setae ps2 posterior to anal opening, distance between setae: ps2:ps2 32–34, ps3:ps3 15–20, ps2:ps3 37–40. Primary spermaduct slightly enlarged and finely verrucate in most proximal part (15–20 long) and also enlarged in most distal part; visible part of secondary spermaducts approximately about 10 long ( Fig. 8 E).

Femur I without crest, femur II with ventral crest, other segments of these legs as in male. Solenidion σ 1 of genu I short, 15–16 long, situated at midlevel of segment. Genual setae cG I, II, mG I, II setiform. Setae d of tarsi II–IV shorter than corresponding setae e, f. Genu IV inflated dorsally, with wide longitudinal dorsal crest ( Fig. 8 D), genu III with low longitudinal dorsal crest.

Differential diagnosis. Among previously described species, Amerodectes wilsoniae sp. n. is most similar to A. geothlypis ( Berla, 1973) described from Geothlypis aequinoctialis (Gmelin) in Brazil ( Berla, 1973) by the loss of humeral shields in both sexes and by having short and narrowly lanceolate setae h 3 in males. Amerodectes wilsoniae differs from A. geothlypis by the following features: in males, the aedeagus extends to the anterior end of terminal cleft, the sternum formed by fused epimerites I is acute, setae h3 are 20–22 long and definitely shorter than distance between their bases, the prodorsal and hysteronotal shields are without lacunae or sometimes with patches of very small and scarcely distinct lacunae; in females, the lobar shield is split longitudinally, the posterior one third of hysteronotal shield with well outlined circular lacunae. In males of A. geothlypis , the aedeagus extends to the anterior margin of anal suckers, the fused part of epimerites I is tridentate, setae h3 are about 35 long and subequal to the distance between their bases, the prodorsal and hysteronotal shields are entirely covered with circular lacunae; in females, the lobar shield is entire, the posterior one third of hysteronotal shield has no lacunae.

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

Figures

FIGURE 6. Amerodectes wilsoniae sp. n., male. A — dorsal view, B — ventral view.

FIGURE 7. Amerodectes wilsoniae sp. n., female. A — dorsal view, B — ventral view.

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.