Amerodectes caribaeus, 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 : 21-25

Amerodectes caribaeus sp. n.

( Figs. 11 , 12 , 13 A–E)

Type material. Holotype male ( ZISP 4613 ), 4 male and 10 female paratypes from the Cuban Pewee Contopus caribaeus (Linnaeus) ( Tyrannidae ), CUBA: Habana, 23°6'52"N 82°23'1"W, 9 October 2007, coll. D.A. González-Acuña.

Type depository. Holotype, 3 males and 9 female paratypes—ZISP, remaining paratypes—DGA.

Description. MALE (holotype, range for 4 paratypes in parentheses). Idiosoma, length × width, 352 (350–370) × 137 (130–145), length of hysterosoma 227 (220–240). Prodorsal shield: 110 (106–113) × 108 (105–115), lateral margins entire, posterior margin straight, antero-lateral extensions acute, surface without pattern; scapular setae se separated by 57 (55–58) ( Fig. 11 A). Setae ve present. Humeral shields absent. Setae c2 and cp situated on soft tegument. Subhumeral setae c3 lanceolate, 20 (20–24) × 7 (6–7.5). Hysteronotal shield: greatest length 232 (230– 250), width in anterior part 102 (100–105), anterior margin straight, entire surface without pattern. Distance between prodorsal and hysteronotal shields 12 (10–15). Opisthosomal lobes approximately as long as wide at base; posterior margin of lobes roughly rounded, with poorly expressed extensions at bases of setae h2. Terminal cleft shaped as a wide inverted U, 31 (30–35) long. Supranal concavity present, semicircular. Setae f2 absent. Setae h1 situated at level of supranal concavity, close to lateral margins of opisthosoma. Setae h3 narrowly lanceolate, short, 22 (20–22) × 3 (3–3.5); setae ps2 73 (70–80) long; setae ps1 minute, about 10 long, situated near margin of terminal cleft, anterior to level of setae ps2. Distance between bases of dorsal setae: c2:d2 93 (90–95), d2:e2 88 (85–95), e2:h3 44 (44–51), d1:d2 35 (25–35), e1:e2 33 (30–35), h1:ps2 29 (27–31), h2:h2 63 (60–67), h3:h3 45 (45–50), ps2:ps2 80 (77–82).

Epimerites I fused into a narrow V, fused part with a pair of acute lateral extensions, inner margin of epimerites II with short and acute extensions ( Fig. 11 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 moderate size, 27 (25–28) × 42 (40–44); basal sclerite of genital apparatus with rounded posterior margin; aedeagus sword-shaped, 89 (85–90) long, extending to posterior margin of anal suckers; genital papillae not connected by bases. Genital and adanal shields absent. Anal suckers 11 (11–12) in diameter, corolla smooth. Opisthoventral shields narrow, occupying only lateral parts of opisthosoma; setae ps3 situated much postero-lateral to level of anal suckers, near bases of setae ps2. Distance between ventral setae: 3b:3a 15 (12–15), 3a:4a 42 (40– 46), 4a:g 55 (52–57), g:ps3 50 (50–55), ps3:ps3 70 (65–70), ps3:h3 12 (11–14).

Femora I, II with narrow ventral crests, other segments of legs I, II without processes. Solenidion σ 1 of genu I 13 (12–13) long, situated at midlevel of segment; genual setae cG I, II and mG I, II filiform ( Figs. 13 A, B). Setae d of tarsi II, III approximately half as long as corresponding setae f. Tarsus IV 33 (31–33) long, without apical process; seta d situated at midlevel of segment; solenidion φ of tibia IV extending to midlevel of ambulacral disc ( Fig. 13 C).

FEMALE (9 paratypes). Idiosoma, length × width, 500–540 × 175–190, length of hysterosoma 345–390. Prodorsal shield: general form and surface as in male except for posterior margin with blunt median extension, 130– 135 × 128–148, setae se separated by 70–85 ( Fig. 12 A). Setae ve present, minute. Humeral shields absent. Setae c2 and cp situated on soft tegument. Setae c3 lanceolate, 23–25 × 7–7.5. Distance between prodorsal and hysteronotal shields 22–28. Anterior and lobar parts of hysteronotal shield separated dorsally by narrow transverse band of soft tegument, but remain connected ventro-laterally ( Fig. 12 B). Anterior hysteronotal shield slightly enlarged anteriorly, anterior margin slightly concave, posterior margin convex, greatest length 265–295, width at anterior margin 112–133, surface without pattern. Length of lobar region 88–98, greatest width 95–100. Terminal cleft narrow, parallel-sided, extending slightly beyond level of setae h2, 60–70 long, 4–6 wide at level of lobar apices. Supranal concavity poorly distinct. Setae h1 on lobar shield, close to anterior margins; setae f2 absent. Setae h2 spindle-like, 62–68 × 8–9. Setae ps1 equidistant from outer and inner margins of opisthosomal lobes. Setae h3 28–32 long, about 1/3 of terminal appendages. Distance between dorsal setae: c2:d2 112–120, d2:e2 122–150, e2:h2 50–55, h2:h3 52–55, d1:d2 40–55, e1:e2 42–46, h1:h2 18–20, h1:h1 40–42, h2:h2 78–86.

Epimerites I fused into a V; fused part without lateral extensions; inner margin of epimerites II with short and acute extension. Lateral parts of coxal fields II with large sclerotized areas. Epimerites IVa absent. Translobar apodemes of opisthosomal lobes present, wide, not fused anterior to terminal cleft. Epigynum with short lateral extensions, greatest width 70–75; apodemes of eoviporus separated from epimerites IIIa. Pseudanal setae ps2, ps3 filiform, setae ps2 situated posterior to anal opening, on anterior margin of translobar apodemes ( Fig. 12 B); distance between setae: ps2:ps2 47–57, ps3:ps3 25–29, ps2:ps3 40–55. Primary spermaduct with scarcely noticeable enlargement in proximal part; secondary spermaducts 15–20 long, nearly twice as long as enlargement of primary spermaduct ( Fig. 13 E).

Femora I, II with ventral crest, other segments without processes. Solenidion σ 1 of genu I 12–14 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 longitudinal dorsal crest in proximal half ( Fig. 13 D), genu III without dorsal crest.

Differential diagnosis. Males of Amerodectes caribaeus sp. n. are most similar to those of the previous species, A. contopus , by the general shape of dorsal and opisthoventral shields and by having short and lanceolate setae h3 whose length does not exceed the distance between their bases. Both sexes of Amerodectes caribaeus are easily distinguished from A. contopus and from all other known Amerodectes species by the absence of idiosomal setae f2. Additionally, A. caribaeus differs from A. contopus by the following features: in both sexes distinct lacunae on the prodorsal and hysteronotal shields are absent; in males, setae h1 are situated close to the lateral margins of opisthosoma, and setae ps3 are situated far posterior to the level of the anal suckers, almost at bases of setae ps2 ( Fig. 11 B); in females, the apodemes of oviporus are separated from epimerites IIIa, setae h3 are as long as 1/3 of terminal appendages, the posterior margin of anterior hysteronotal shield is convex, and setae ps1 are situated equidistantly from margins of opisthosomal lobes ( Figs. 12 A, B). In both sexes of A. contopus , small lacunae are present in at least some parts of dorsal shields; in males, setae h1 are equidistant from the midline and corresponding lateral margins of the opisthosoma, and setae ps3 are situated at the level of the anal suckers; in females, the apodemes of oviporus are fused with epimerites IIIa, setae h3 are at most 1/8th the length of terminal appendages, the posterior margin of anterior hysteronotal shield is concave, and setae ps1 are situated on inner margins of opisthosomal lobes.

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

Figures

FIGURE 11. Amerodectes caribaeus sp. n., male. A — dorsal view, B — ventral view.

FIGURE 12. Amerodectes caribaeus sp. n., female. A — dorsal view, B — ventral view.

FIGURE 13. Amerodectes species, details. A – E — Amerodectes caribaeus sp. n., F – J — Amerodectes plumbeus 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.