Montesauria seicerci, Mironov, Sergey, Literak, Ivan, Hung, Nguyen Manh & Capek, Miroslav, 2012

Mironov, Sergey, Literak, Ivan, Hung, Nguyen Manh & Capek, Miroslav, 2012, New feather mites of the subfamily Pterodectinae (Acari: Proctophyllodidae) from passerines and woodpeckers (Aves: Passeriformes and Piciformes) in Vietnam, Zootaxa 3440, pp. 1-49 : 22-26

Montesauria seicerci sp. n.

( Figs. 13–15 )

Type material. Male holotype ( ZISP 4766), 9 male and 6 female paratypes from Seicercus valentini (Hartert) (Phylloscopidae) , VIETNAM: Ninh Binh, Cuc Phuong National Park, 20°21' N 105°35' E, 1 February 2010, coll. I. Literak, Nguen Manh Hung and M. Capek.

Type depositories: Holotype, 7 male and 4 female paratypes—ZISP, remaining paratypes—UMMZ, IEBR.

Description. MALE (holotype, range for 9 paratypes). Length of idiosoma 353 (315–355), width 120 (118–123), length of hysterosoma 210 (200–215). Prodorsal shield: entire, occupying almost entire prodorsum, antero-lateral extensions short and acute, lateral margins without incisions, posterior margin straight, length of shield 110 (104–110), width 100 (97–100) ( Fig. 13 A). Setae ve represented by microsetae. Scapular setae se separated by 51 (50–52). Scapular shields narrow. Humeral shields present, rudimentary, represented by small sclerites posterior to bases of setae cp. Setae cp and c2 situated on soft tegument. Subhumeral setae c3 lanceolate, 20 (18–20) × 7 (6.5–7). Hysteronotal shield: greatest length 210 (205–215), width in anterior part 95 (93–98), anterior margin straight, surface withour ornamentation.

Opisthosomal lobes short, approximately as long as wide at base, slightly narrowed apically; posterior margin with short and blunt extensions at bases of setae h2, h3. Terminal cleft as narrow inverted trapezium, anterior margin of cleft slightly convex, 20 (19–22) in length. Supranal concavity closed, roughly ovate, length from anterior margin of terminal cleft to anterior end of concavity 18 (17–19). Bases of setae f2 and ps2 at same transverse level. Setae h1 at level of supranal concavity. Setae h3 spiculiform, 29 (28–35) long, setae ps2 66 (60–66) long; setae ps1 minute, shorter than 5, situated on inner margin of opisthosomal lobes, slightly anterior to bases of setae h3. Distance between dorsal setae: c2:d2 93 (86–95), d2: e2 80 (75–82), e2:h3 36 (30–35), d1:d2 35 (32–38), e1: e2 31 (27–31), h1:ps2 25 (22–25), h2:h2 52 (49–53), h3:h3 37 (33–37), ps2:ps2 60 (58–61).

Epimerites I fused into a Y, sternum about ¼ of total length of epimerites, posterior end of sternum with short and acute extensions not connected to epimerites II ( Fig. 13 B). Epimerites II with short and acute extension on inner margin. Coxal fields I, II without wide sclerotized areas. Rudimentary sclerites rEpIIa absent. Inner margin of epimerites IIIa with slightly widened extensions directed backward and bearing setae 4b. Coxal fields I, III nearly closed, coxal fields II open. Coxal fields IV without sclerotized area at bases of trochanters. Epimerites IVa thin, and short, not extending to bases of setae 4a. Genital arch small, with short and rounded lateral wing-like extension, 13 (13–15) long, 29 (28–33) wide (including extensions); basal sclerite shaped as inverted trapezium, with branches diverging wider than genital arch. Aedeagus 95 (93–96) long, extending to midlevel of terminal cleft ( Fig. 15 A). Genital papillae not connected by their bases, arranged in transverse or slightly curved row. Genital and adanal shields absent. Anal suckers 13 (13–14) in diameter, corolla with 16–18 slightly distinct indentations, surrounding membrane wide, with radial striae. Opisthoventral shields narrow, without extensions on inner margin. Setae ps3 situated postero-lateral to anal suckers, approximately at level of anterior margin of terminal cleft. Distance between ventral setae: 3a:4b 10 (9–11), 4b–4a 46 (43–46), 4a–g 28 (27–30), g–ps3 58 (55–60), ps3–ps3 60 (55–60), ps3:h3 15 (14–15).

Legs I, especially their tarsus and tibia, thicker than legs II; femora I, II with ventral crest, other segments of legs I, II without processes. Solenidion σ 1 of genu I spiculiform, 8 (7–8) long, situated at midlevel of segment; genual setae cG I, cG II, mG I filiform, setae mG II slightly thicker than these setae in basal part. Seta d, f of tarsi II, III shorter than corresponding seta f. Legs III, IV similar in size. Solenidion φ of tibia IV extending to midlevel of ambulacral disc. Tarsus IV 20 (19–20) long, with short apical claw-like extension; seta e button-like, seta d minute spiniform, with noticeably inflated base, situated in proximal half of segment ( Figs. 15 B–E). Length of solenidia: ω 1 I 11 (9–11), ω 1 II 7 (7–8), φI 55 (50–55), φII 44 (40–44), φIII 24 (18–24), φIV 29 (25–30).

FEMALE (6 paratypes). Length of idiosoma 450–470, width 135–155, length of hysterosoma 315–330. Prodorsal shield: antero-lateral extensions connected with epimerites Ia, lateral margins with incisions extending to bases of setae se, posterior margin slightly convex, surface without ornamentation, length 132–139, width 115–126 ( Fig. 14 A). Setae ve rudimentary, represented by microsetae. Setae se separated by 65–71. Scapular shields not developed dorsally. Humeral shields absent; setae cp and c2 situated on soft tegument. Setae c3 lanceolate, 19–21 × 7–8. Anterior and lobar pieces of hysteronotal shield separated dorsally by narrow transverse band of soft tegument but remain connected ventro-laterally. Anterior hysteronotal shield slightly attenuate posteriorly, anterior margin straight, greatest length 230–236, width at anterior margin 118–133, surface without ornamentation. Length of lobar region 88–93, greatest width 79–82, anterior margin straight or slightly concave. Terminal cleft parallelsided, very narrow, length 50–57, width at midlevel 2–5. Supranal concavity circular, small, well outlined. Setae h1 on lobar shield, anterior to level of supranal concavity. Setae h2 spindle-like, 39–44 × 7–8. Setae ps1 closer to inner margins of opisthosomal lobes than to outer ones. Setae h3 short, 15–22 in length, about 1/5th the length of terminal appendages. Distance between dorsal setae: c2:d2 102–128, d2: e2 95–110, e2:h2 42–46, h2:h3 44–50, d1:d2 45–60, e1: e2 32–35, h1:h 2 22–27, h2:ps 1 29–31, h1:h1 37–44, h2:h2 64–66.

Epimerites I fused into a Y with very short sternum about 1/5th of total length of epimerites, sternum without lateral extensions ( Fig. 14 B). Lateral parts of coxal fields I, II without heavily sclerotized areas. Epimerites IVa absent. Translobar apodemes of opisthosomal lobes present, narrow, fused to each other anterior to terminal cleft. Epigynum horseshoe-shaped, lateral parts widened, with small ledge, greatest width 60–68. Copulatory opening situated ventrally at anterior terminal cleft, covered with narrow semicircular fold. Proximal part of primary spermaduct near head of spermatheca slightly thickened; head of spermatheca with cup-like structure having toothlike extensions; secondary spermaducts short, 20–25 long ( Fig. 15 F). Distance between pseudanal setae: ps2:ps2 46–48, ps3:ps 3 20–22, ps2:ps 3 12–15; setae ps2 situated at level of posterior half of anal opening.

Legs I slightly thicker than legs II; femur II with wide ventral crest; other segments of legs I, II without processes. Solenidion σ 1 of genu I spiculiform, 10–11 long. Genual setae cG I, cG II, mG I filiform, setae mG II noticeably thickened in basal part. Setae d of tarsi II–IV shorter than corresponding setae f. Genu IV inflated basally, without noticeable longitudinal crest ( Figs. 15 G, H). Length of solenidia: ω 1 I 13–14, ω 1 II 7–9, φI 62–64, φII 48–51, φIII 22–24, φIV 8–9.

Differential diagnosis. Montesauria seicerci sp. n. is most similar to the previous species, M. phylloscopi , by having the following features: in males, small genital arch, basal sclerite of genital apparatus is shaped as inverted trapezium, seta d on tarsus IV is short spine-like and situated on an inflated base; in females, the copulatory opening is covered ventrally with a narrow transverse fold of cuticle, the head of spermatheca with basal denticles dents. Montesauria seicerci differs from that species by the following features: in males, the sternum is distinctly separated from epimerites II, the aedeagus extends to the midlevel of terminal cleft, the rudimentary humeral shields are present, stick-like extensions of epimerites IIIa bearing setae 4b are thickened posteriorly; in females, setae h1 are situated near the anterior margin of the lobar shield, the lateral incisions of prodorsal shield extend only to bases of setae se. In males of M. phylloscopi , the sternum is connected to epimerites II by narrow transverse bands, the aedeagus extends almost to the level of lobar apices, the humeral shields are absent, stick-like extensions of epimerites IIIa are not thickened posteriorly; in females, setae h1 are situated at the level of supranal concavity, the lateral incisions of prodorsal shield extend mesal to bases of setae se or encompass them.

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

Figures

FIGURE 13. Montesauria seicerci sp. n., male. A — dorsal view, B — ventral view.

FIGURE 14. Montesauria seicerci sp. n., female. A — dorsal view, B — ventral view.

FIGURE 15. Montesauria seicerci sp. n., details. A — opisthosoma of male, ventral view, B – E — legs I – IV of male, respectively, F — head of spermatheca and spermaducts, G, H — legs III and IV of female.