Montesauria abroscopi, 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 : 4-9

Montesauria abroscopi sp. n.

( Figs. 1–3 )

Type material. Male holotype ( ZISP 4728), 2 male and 3 female paratypes from Abroscopus superciliaris (Blyth) (Cettiidae) , VIETNAM: Bac Kan, Ba Be National Park, 22°23´N, 105°37´E, 4 July 2008, coll. I. Literak, Nguen Manh Hung and M. Capek.

Type depository. Holotype, 1 female paratype—ZISP, remaining paratypes—UMMZ, IEBR.

Description. MALE (holotype, sizes for 2 paratypes in parentheses). Length of idiosoma 285 (280–290), width 100 (100–105), length of hysterosoma 188 (180–190). Prodorsal shield: entire, antero-lateral extensions short and acute, lateral margins without incisions, posterior margin straight, length 95 (90–98), width 82 (78–84), surface with numerous circular lacunae ( Fig. 1 A). Setae ve present, represented by microsetae. Scapular setae se separated by 40 (38–40). Scapular shields narrow. Humeral shields present, rudimentary, situated above bases of setae cp. Setae c2 situated dorsally, near anterior margins of hysteronotal shield. Subhumeral setae c3 lanceolate, 17 (17–18) × 5 (5–6). Hysteronotal shield: greatest length 190 (188–195), width at anterior margint 75 (72–80), anterior margin convex, anterior angles blunt, surface with numerous small circular lacunae as in prodorsal shield. Opisthosomal lobes short, slightly wider than long, posterior margin roughly rounded, with extremely short blunt extensions at base of setae h2 and h3. Terminal cleft shaped as narrow trapezium, 20 (20–24) long, anterior margin straight or slightly convex. Supranal concavity distinct, circular. Setae f2 present, situated slightly anterior to base of setae ps2. Setae h1 at level of supranal concavity. Setae h3 thick spiculiform, 34 (32–36) long; setae ps2 60 (54–60) long; setae ps1 filiform, minute, situated on margins of terminal cleft near bases of setae h3. Distance between bases of dorsal setae and setal pairs: c2:d2 75 (72 –77), d2: e2 71 (70–74), e2:h3 33 (32–35), d1:d2 33 (33–35), e1: e2 33 (30–32), h1:ps2 23 (23–25), h2:h2 36 (36–40), h3:h3 22 (22–26), ps2:ps2 46 (45–49),.

Epimerites I fused as a Y, sternum about ¼ of total length of epimerites, its posterior end free ( Fig. 1 B). Coxal fields I–II without large sclerotized areas. Coxal fields I, II open, coxal fields III almost closed. Coxal fields IV without sclerotized areas at corresponding trochanters. Inner margins of epimerites IIIa with straight extension directed backward and bearing bases of setae 4b. Rudimentary sclerites rEpIIa absent. Epimerites IVa present, small. Genital arch small, with wing–like lateral extensions, 20 (18–20) long, 26 (24–26) wide; basal sclerite of genital apparatus shaped as inverted trapezium. Aedeagus 84 (83–86) long, almost extending to level of setae h3 bases ( Fig. 3 A). Genital papillae not connected by their bases, arranged in transverse row. Genital and adanal shields absent. Anal suckers 11 (11–12) in diameter, corolla with 11–12 small indentations, surrounding membrane large, with wavy radial striae. Opisthoventral shields narrow, with small extension immediately anterior to bases of setae ps2. Setae ps3 postero-lateral to anal suckers, situated on extension of opisthoventral shields approximately at midlevel of terminal cleft. Distance between ventral setae: 3a:4b 12 (10–12), 4b–4a 40 (40–44), 4a–g 24 (23–25), g–ps3 49 (47–50), ps3–ps3 49 (48–51), ps3:h3 12 (12–13).

Legs I noticeably thicker than legs II, especially tarsi and tibiae. Femora I, II with narrow ventral crests, other segments of legs I, II without processes. Solenidion σ 1 of genu I 5 (5–6) long, situated at midlevel of segment; genual setae cG I, II, mG I, II filiform. Solenidion σ of genu III in distal half of segment. Setae d of tarsi II, III much shorter than corresponding setae f. Tarsus IV 16 (16–18) long, with apical claw-like process; setae d as minute spine, situated on small inflated base in proximal part of segment; seta e button-like, scarcely distinct, situated at base of apical claw-like process. Solenidion φ of tibia IV extending to midlevel of ambulacral disc ( Figs. 3 B–E). Length of solenidia: ω 1 I 8 (8–10), ω 1 II 5 (5–6), φI 51 (48–50), φII 38 (38–42), φIII 13 (13–15), φIV 26 (26–28).

FEMALE (range for 3 paratypes). Length of idiosoma 420–428, width 125–130, length of hysterosoma 292–305. Prodorsal shield: general form as in the male, antero-lateral extensions reaching to lateral margins of propodosoma, lateral margins without incisions around bases of scapular setae, posterior margin straight or slightly convex, 125–130 long, 102–108 wide, anterior one third with small ovate lacunae, remaining part with numerous minute pit-like lacunae ( Fig. 2 A). Setae ve represented by microsetae. Setae se separated by 52–56. Humeral shields absent. Setae cp and c2 situated on soft tegument. Setae c3 lanceolate, 16–17× 6.5–7. Anterior and lobar parts of hysteronotal shield separated from each other by narrow transverse band of soft tegument, but remain connected lateroventrally. Anterior hysteronotal shield roughly rectangular, anterior margins slightly concave or straight, anterior angles rounded, greatest length 215–223, width at anterior margin 110–115; entire surface with small pit-like lacunae as on posterior part of prodorsal shield. Length of lobar region 82–86, width 72–77, anterior margin slightly convex. Terminal cleft parallel-sided, very narrow, 45–47 long, 4–5 wide at midlevel. Supranal concavity present, circular. Setae f2 present. Setae h1 on lobar shield, approximately at level of supranal concavity. Setae h2 spindle-like, 39–42 long, 7–8 wide. Setae ps1 near inner margins of opisthosomal lobes. Setae h 3 12–15 long, about 1/5–1/6 of terminal appendages. Distance between dorsal setae: c2:d2 108–115, d2: e2 98–106, e2:h2 40–42, h2:h3 40–44, d1:d2 46–48, e1: e2 40–47, h1:h 2 20–24, h2:ps 1 26–28, h1:h 1 31–38, h2:h2 57–62.

Epimerites I fused as a Y, sternum about ¼ of total length of epimerites ( Fig. 2 B). Coxal fields I, II without wide sclerotized areas. Epimerites IVa absent. Translobar apodemes of opisthosomal lobes present, wide, fused each other anterior to terminal cleft. Epigynum horseshoe-shaped, lateral parts widened, with small ledge, greatest width 55–58. Copulatory opening situated immediately posterior to anal opening. Proximal part of primary spermaduct near head of spermatheca slightly thickened; head of spermatheca with cup-like structure having toothlike extensions; secondary spermaducts very short, 4–5 in length ( Fig. 3 F). Distance between pseudanal setae: ps2:ps2 42–44, ps3:ps 3 23–25, ps2:ps 3 10–11.

Legs I slightly longer than legs II; femur II with angle-shaped ventral crest; other segments of legs I, II without processes. Solenidion σ 1 of genu I, 5–6 long, situated slightly closer to distal margin of this segment. Genual setae cG I, cG II, mG I filiform, mG II spiculiform. Setae d of tars II–IV longer than corresponding setae f. Genu IV strongly inflated dorsally, with narrow longitudinal crest, genu III with narrow longitudinal crest ( Figs. 3 G, H). Solenidion φ of tibia IV much shorter than that on tibia III. Length of solenidia: ω 1 I 10–12, ω 1 II 7–9, φI 56–58, φII 44–46, φIII 17–20, φIV 5–7.

Differential diagnosis. Montesauria abroscopi sp. n. belongs to the papillo species group (Mironov 2006) and among its previously known species is most close to M. eurycalyx ( Gaud, 1964) , described from Cisticola brachyptera (Sharpe) (Cisticolidae) by having the following features in males: the genital arch has relatively short wing-like extensions, the basal sclerite of the genital arch is trapezium-shaped, the aedeagus extends to the level of terminal cleft, and setae h3 are spiculiform. Montesauria abroscopi differs from that species by the following features: in both sexes, the prodorsal and hysteronotal shields are covered with numerous small ciscular lacunae ( Figs. 1 A, 2A); in males, the terminal cleft is narrow trapezoidal in form, the inner margins of epimerites IIIa have narrow extensions directed backward and bearing setae 4b ( Fig. 1 B), setae h3 32–36 long, seta d of tarsus IV is short spiculiform sitting on small inflated base ( Fig. 3 E); in females, the posterior margin of prodorsal shield is straight, and the primary spermaduct is slightly enlarged in the proximal 1/8th. In both sexes of M. eurycalyx , the prodorsal and hysteronotal shields lack lacunae; in males, the terminal cleft is angle-shaped, the inner margins of epimerites IIIa have no extensions, setae h3 are 65–75 long, seta d of tarsus IV is button-like; in females, the posterior margin of prodorsal shield is sinuous, and the proximal enlargement of the primary spermaduct is about 1/3rd of its total length.

Remark. Within the papillo species group, M. abroscopi and two more species described below in the present paper ( M. phylloscopi sp. n. and M. seicerci sp. n.) constitute a distinct complex of closely related species, characterized by the following combination of features in males: the anterior margin of prodorsal shield has a short blunt-angular extension, the terminal cleft is shaped as a narrow trapezium, the anterior margin of the terminal cleft is slightly convex, the inner margins of epimerites IIIa have a narrow extension directed backward and bearing the bases of setae 4b, and seta d of tarsus IV is short spiniform sitting on small inflation ( Figs. 1 A, 3A, E.)

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

Figures

FIGURE 1. Montesauria abroscopi sp. n., male. A — dorsal view, B — ventral view.

FIGURE 2. Montesauria abroscopi sp. n., female. A — dorsal view, B — ventral view.

FIGURE 3. Montesauria abroscopi 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, respectively. bs—basal sclerite, co—copulatory opening, ga—genital arch, hs—head of spermtheca, pd—primary spermaduct, sd—secondary spermaduct, vc—ventral crest of femora I, II, we—wing-like extensions of genital arch.