Atrichophyllodes latilobus Mironov, 2017

Mironov, Sergey V., Literak, Ivan, Sychra, Oldrich & Capek, Miroslav, 2017, Feather mites of the subfamily Proctophyllodinae (Acari: Proctophyllodidae) from passerines (Aves: Passeriformes) in Costa Rica, Zootaxa 4297 (1), pp. 1-105 : 77-80

Atrichophyllodes latilobus Mironov sp. n.

( Figs. 43–45 )

Type material. Male holotype ( ZISP 6340 ), 3 male and 2 female paratypes from Hylophylax naevioides (Lafresnaye, 1847) ( Thamnophilidae ), COSTA RICA, Rincón de la Vieja National Park , Cordillera de Guanacaste Mts., 10°46'N, 85°18'W, 20 August 2009, collectors I. Literak, O. Sychra and M. Capek.

Depositories. Holotype, 2 male and 1 female paratypes (ZISP 6341–6343)—ZISP, 1 male and 1 female paratype—IMUCR.

Description. MALE (holotype, range for 3 paratypes in parentheses). Idiosoma, length × width, 325 (315– 325) × 195 (185–195), length of hysterosoma 210 (200–210). Prodorsal shield: anterolateral extensions acute, lateral margins entire, posterior margin with small median extension and two wide shallow concavities, 100 (90– 100) in length, 135 (125–135) in width, surface without ornamentation ( Fig. 43 A). Setae ve rudimentary. Scapular setae se separated by 87 (80–88). Setae c2 and cp on humeral shield. Setae c3 lanceolate, 27 (25–28) × 6.5 (6–7). Distance between prodorsal and hysteronotal shields 25 (20–25). Hysteronotal shield: 200 (190–200) in length and 130 (120–135) in width; anterior margin almost straight, anterior angles acute, surface with small circular lacunae in central part. Opisthosomal lobes short and wide, slightly shorter than wide at base, posterior margins semicircular. Terminal lamellae with rounded free margin, greatest length 10 (10–13), surface without striation. Terminal cleft roughly triangular, with rounded anterior end, length of cleft from anterior end to bases of terminal lamellae 47 (45–50). Supranal concavity about 25 long, opened posteriorly into terminal cleft. Setae h3 filiform situated in postero-lateral margins of opisthosomal lobes; setae ps1 minute, situated on lateral margins of terminal cleft, approximately at level of setae h3; setae h1 at level of anterior end of supranal concavity. Distance between dorsal setae: c2:e2 110 (105–115), e2:h3 82 (80–85), h2:h2 87 (83–90), h3:h3 77 (75–80), ps2:ps2 95 (90–98), h1:h3 47 (45–50).

Epimerites I free, well separated, with posterior tips slightly divergent. Epimerites Ia with small semi-rounded lateral extension ( Fig. 43 B). Epimerites I, II with narrow sclerotized fields. Bases of trochanters I–III flanked by narrow sclerotized bands connecting corresponding epimerites. Epimerites IVa absent. Rudimentary sclerite rEpIIa absent. Genital arch short, 13 (12–14) in length and 45 (40–45) in width; branches of arch with blunt-angular bent. Aedeagus stylet-like, 20 (20–22) in length, not reaching level of setae g ( Fig. 45 A). Genital papillae on small oval plates at level of genital arch apex. Distance from genital arch apex to bases of setae h3 115 (115–120). Pregenital apodemes absent. Setae 4b on inner tips of epimerites IIIa, setae 4a on soft tegument near them. Adanal suckers 15 (14–15) in diameter, corolla with 11–12 denticles. Adanal shields roughly L-shaped, connected each other by narrow transverse bridge anterior to anal opening, posterior parts more strongly sclerotized than anterior ones.

Setae ps3 on transverse branches of adanal shields. Distance between ventral setae: 4b:3a 10 (10–12), 4b:4a 27 (24–28), 4a:g 35 (32–35), g:g 25 (24–26), g:ps3 33 (30–34), ps3:ps3 25 (23–25), ps3:h3 60 (58–60).

Femora I, II with narrow ventral crest. Solenidion σ 1 I about 1.3–1.4 times longer than genu I, situated at midlevel of this segment. Solenidion σ of genu III situated at midlevel of segment ( Fig. 45 B–D). Legs III and IV subequal in size; legs IV with ambulacral disc almost extending to level of lobar apices. Tarsus IV 23 (22–24) in length, without apical process; modified setae d and e button-like, seta e approximately 2 times wider than seta d ( Fig. 45 E). Setae d and f of tarsus II subequal, seta d of tarsus III much shorter than corresponding seta f. Length of solenidia: σ 1 I 30 (28–30), σ III 20 (20–23), φ IV 25 (25–27).

FEMALE (range for 2 paratypes). Idiosoma, length × width, 410–415 × 210–215. Prodorsal shield: shaped as in male, anterolateral angles fused with bases of epimerites Ia, 115–120 in length and 160–165 in width. Setae ve rudimentary. Setae se separated by 105–110. Setae c2 and cp on humeral shields; setae c3 lanceolate, 26–28 × 6– 6.5. Distance between prodorsal and hysteronotal shields 30. Anterior hysteronotal shield: 190–195 in length and 160–165 in width, anterior margin slightly concave, posterior margin with short median extension, median area with small poorly distinct lacunae ( Fig. 44 A). Lobar region: 97–100 in length and 165–170 in width, lateral margins with strong semiovate extensions bearing setae h2; lobar shield split into three fragments: a pair of large sclerites covering opisthosomal lobes and a small oval sclerite situated between their anterior ends. Terminal cleft almost rectangular, 55–60 in length and 27–29 in width. Supranal concavity absent. Setae h2 thickened in basal part, 140–150 in length, 6–6.5 in width; setae h3 55–60 in length, about 1/2 of terminal appendages. Setae h1 inserted on striated tegument between the anterior hysteronotal and lobar shields. Setae h1 and f 2 in trapezoidal arrangement Setae ps1 situated slightly posterior to level of setae h3. Distance between dorsal setae: c2:e2 140– 145, e2:h2 87–90, h2:h 3 28–30, h1:h2 56–58, h2:ps 1 26–28, h1:h1 37–38, h2:h2 140–145.

Epimerites I, II as in male, with narrow sclerotized fields. Epimerites IVa large. Bases of trochanters I–IV flanked by narrow sclerotized bands connecting corresponding epimerites. Epigynum thick semicircular, with small lateral extensions, 45–48 in length, 78–80 in width, tips almost extending to level of genital papillae ( Fig. 44 B). Both genital papillae of each side and corresponding setae g on small longitudinal plate. Translobar apodemes wide, not fused to each other anterior to terminal cleft. Copulatory opening ventral, situated near anterior end of terminal cleft. Head of spermatheca short cylindrical, primary spermaduct without enlargements, secondary spermaducts 35–40 in length ( Fig. 45 F). Setae ps2 at middle level of the anal opening. Distance between pseudanal setae, ps2:ps2 56–58, ps3:ps 3 24–25, ps2:ps 3 10–11.

Legs I, II as in male. Solenidion σ of genu III situated closer to base of this segment. Legs IV with ambulacral disc extending to level of setae h2. Solenidion φ of tibia IV slightly shorter than corresponding tarsus. Setae d of tarsus II slightly longer than corresponding seta f, setae d of tarsi III, IV shorter than corresponding setae f. Length of solenidia: σ 1 I 31–33, σ III 22–24, φ III 54 –56, φ IV 22–24.

Differential diagnosis. The new species Atrichophyllodes latilobus sp. n. is most similar to A. mentalis Hernandes, Valim and Mironov, 2007 , described from Dysithamnus mentalis (Temminck) (Thamnophilidae) from Brazil ( Hernandes et al. 2007), by the absence of rudimentary sclerites rEpIIa in males, and in having strong lateral extensions of the opisthosomal lobes bearing setae h 2 in females. Atrichophyllodes latilobus sp. n differs from A. mentalis by the following features. In males, the aedeagus does not extend to the level of setae g, the genital papillae are situated on small ovate plates, the apical button-like seta e of tarsus IV is nearly two times larger than proximal button-like seta d; in females, the greatest width of lobar region is twice as wide as the base of the lobar region; the lobar shield is split into three pieces (two large lateral pieces covering lobes and a small median fragment), and setae ps1 are situated at the level of setae h3. In males of A. mentalis , the aedeagus extends to the level of setae g, the genital papillae are situated on the soft tegument and joined at their bases, the proximal button like seta d of tarsus IV is nearly two times larger than apical button-like seta e; in females, the greatest width of the lobar region is 1.2-1.5 times that of the base, the lobar shield is entire, and setae ps1 are distinctly anterior to the level of setae h3.

Etymology. The specific epithet refers to uncommonly wide opisthosomal lobes in females.

Figures

FIGURE 43. Atrichophyllodes latilobus Mironov sp. n., male. A—dorsal view, B—ventral view.

FIGURE 44. Atrichophyllodes latilobus Mironov sp. n., female. A—dorsal view, B—ventral view.

FIGURE 45. Atrichophyllodes latilobus Mironov sp. n., details. A—opisthosoma of male, ventral view, B – D—legs I – III of male, dorsal view, E—tibia and tarsus IV of male, dorsal view, F—spermatheca and spermaducts.