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

publication ID 10.11646/zootaxa.3057.1.1


persistent identifier

treatment provided by


scientific name

Amerodectes wilsoniae

sp. n.

Amerodectes wilsoniae   sp. n.

( Figs. 6 View FIGURE 6 , 7 View FIGURE 7 , 8 View FIGURE 8 A–E)

Type material. Male holotype ( ZISP 4599 View Materials ), 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. GoogleMaps  

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 View FIGURE 6 A). Setae ve represented by alveoli, scarcely distinct. Humeral shields absent. Setae c 2, cp situated on soft tegument. Subhumeral setae c 3 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 h 2 and h 3. Terminal cleft shaped as an inverted U with slightly divergent branches, 30 (25–30) in length. Supranal concavity poorly distinct, semicircular. Setae f 2 situated anterior to bases of setae ps 2. Setae h 1 situated approximately at level of supranal concavity. Setae h 3 narrowly lanceolate, 22 (21–23) × 3 (3–4); setae ps 2 70 (68–80) long; setae ps 1 minute, filiform, about 5 long, situated near margin of terminal cleft, slightly anterior to level of setae ps 2. Distance between bases of dorsal setae: c 2:d 2 84 (80–90), d 2:e 2 82 (80–84), e 2:h 3 48 (45–52), d 1:d 2 24 (24–32), e 1:e 2 26 (24–27), h 1:ps 2 24 (24–26), h 2:h 2 53 (52–60), h 3:h 3 35 (35–44), ps 2:ps 2 64 (62–74).

Epimerites I fused into a Y; sternum short, with acute posterior end and without lateral extensions ( Fig. 6 View FIGURE 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 ps 3 situated on these extensions, at level of posterior margin of anal suckers. Distance between ventral setae: 3 b: 3a 12 (9–14), 3 a: 4a 42 (40–44), 4 a:g 42 (40–42), g:ps 3 46 (46–48), ps 3:ps 3 55 (54–57), ps 3:h 3 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 View FIGURE 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 View FIGURE 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 View FIGURE 7 A). Setae ve represented by alveoli as in male. Humeral shields absent. Setae c 2, cp situated on soft tegument. Setae c 3 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 View FIGURE 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 h 2, 60–66 long, width at level of lobar apices 9–15. Setae h 1 on lobar shield pieces, posterior to level of supranal concavity; setae h 1 and f 2 arranged in low trapezium. Setae h 2 spindle-like, 42–47 × 7 –8.5. Setae ps 1 near inner margins of opisthosomal lobes. Setae h 3 10–12 long, about 1 / 6 of terminal appendages. Distance between dorsal setae: c 2:d 2 110–115, d 2:e 2 110–117, e 2:h 2 70–72, h 2:h 3 40–49, d 1:d 2 35–42, e 1:e 2 33–37, h 1:h 2 24–32, h 2:ps 1 20–22, h 1:h 1 28–32, h 2:h 2 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 View FIGURE 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 ps 2, ps 3 filiform, setae ps 2 posterior to anal opening, distance between setae: ps 2:ps 2 32–34, ps 3:ps 3 15–20, ps 2:ps 3 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 View FIGURE 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 View FIGURE 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 h 3 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 h 3 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.


Royal British Columbia Museum - Herbarium