Montesauria phylloscopi, 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 : 18-22

Montesauria phylloscopi sp. n.

( Figs. 10–12 )

Type material. Male holotype ( ZISP 4759), 4 male and 6 female paratypes from Phylloscopus ricketti (Slater) (Phylloscopidae) , VIETNAM: Ninh Binh, Cuc Phuong National Park, 20°21' N 105°35' E, 4 February 2010, coll. I. Literak, Nguen Manh Hung and M. Capek.

Type depository. Holotype, 2 male and 4 female paratypes—ZISP, remaining paratypes—UMMZ, IEBR.

Description. MALE (holotype, range for 4 paratypes). Length of idiosoma 334 (320–335), width 128 (125–130), length of hysterosoma 218 (208–220). Prodorsal shield: entire, occupying almost entire prodorsum, antero-lateral extensions short and acute, lateral margins without incisions, posterior margin straight, length of shield 110 (108–111), width 110 (110–113) ( Fig. 10 A). Setae ve represented by microsetae. Scapular setae se separated by 49 (48–53). Scapular shields narrow. Humeral shields absent. Setae cp and c2 situated on soft tegument. Subhumeral setae c3 lanceolate, 19 (19–21) × 8 (8–9). Hysteronotal shield: greatest length 223 (214–225), width at anterior margin 102 (102–108), anterior margin straight, surface without 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 this cleft slightly convex, 20 (19–20) in length. Supranal concavity roughly ovate. Bases of setae f2 and ps2 at same transverse level. Setae h1 at level of supranal concavity. Setae h3 spiculiform, 28 (28–30) long, setae ps2 70 (70–75) 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 88 (85–90), d2: e2 83 (77–85), e2:h3 40 (38–40), d1:d2 40 (32–38), e1: e2 37 (36–38), h1:ps2 20 (20–21), h2:h2 44 (44-48), h3:h3 33 (32–34), ps2:ps2 56 (55–60).

Epimerites I fused into a Y, sternum about 1/4th of total length of epimerites, posterior end of sternum connected to epimerites II by narrow transverse bands (in some specimens one or both bands may be interrupted) ( Fig. 10 B). Coxal fields I, II without wide sclerotized areas. Rudimentary sclerites rEpIIa absent. Inner margin of epimerites IIIa with narrow extensions directed backward and bearing setae 4b. Coxal fields I closed, coxal fields II open, coxal fields III nearly closed. 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 extension, 17 (17–19) long, 33 (31–34) wide including extensions; basal sclerite shaped as inverted trapezium. Aedeagus 100 (98–100) long, extending almost to level of lobar apices ( Fig. 12 A). Genital papillae not connected by their bases, arranged in transverse or slightly curved row. Anal suckers 11 (11–12) in diameter, corolla with 13–15 small indentations, surrounding membrane wide, with wavy radial striae. Opisthoventral shields narrow, with very short and acute extension 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 11 (11–12), 4b–4a 46 (45–47), 4a–g 31 (26–30), g–ps3 55 (51–55), ps3–ps3 60 (58–60), ps3:h3 15 (15–20).

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 8 (8–9) 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 half as long as 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 spiculiform, with noticeably inflated bases, situated in proximal half of segment ( Figs. 12 B–E). Length of solenidia: ω 1 I 10 (9–10), ω 1 II 7 (7–8), φI 55 (54–56), φII 42 (42–44), φIII 20 (18–20), φIV 26 (26–29).

FEMALE (6 paratypes). Length of idiosoma 455–470, width 146–155, length of hysterosoma 330–340. Prodorsal shield: antero-lateral extensions connected with epimerites Ia, lateral margins with incisions usually encompassing bases of setae se, posterior margin slightly convex, length 133–135, width 128–135, surface without ornamentation ( Fig. 11 A). Setae ve represented by microsetae. Setae se separated by 70–72. Scapular shields not developed dorsally. Humeral shields absent; setae cp and c2 situated on soft tegument. Setae c3 lanceolate, 21–22 × 6.5–7.5. 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 235–245, width at anterior margin 125–135, surface without ornamentation. Length of lobar region 86–90, greatest width 77–80, anterior margin straight. Terminal cleft parallel-sided, very narrow, length 54–58, width at midlevel 4–5. Supranal concavity circular, small. Setae h1 on lobar shield, situated at level of supranal concavity. Setae h2 spindle-like, 43–45 × 7–8. Setae ps1 closer to inner margins of opisthosomal lobes than to outer ones. Setae h3 short, 10–12 in length, about 1/5th the length of terminal appendages. Distance between dorsal setae: c2:d2 120–124, d2:e2 105–108, e2:h2 42–44, h2:h3 46–48, d1:d2 51–55, e1: e2 40–43, h1:h 2 20–22, h2:ps 1 31–33, h1:h1 38–44, h2:h2 64–66.

Epimerites I fused into a Y with very short sternum about 1/5th of total length of epimerites, sternum with short and blunt lateral extensions ( Fig. 11 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, greatest width 64–66. 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, 15–17 long ( Fig. 12 F). Distance between pseudanal setae: ps2:ps2 42–44, ps3:ps 3 22–24, ps2:ps3 7–9.

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 10–12 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 narrow longitudinal crest ( Figs. 12 G, H). Length of solenidia: ω 1 I 9–11, ω 1 II 6–7, φI 55–62, φII 48–50, φIII 22–24, φIV 7–8.

Differential diagnosis. Montesauria phylloscopi sp. n. belongs to the papillo species group (Mironov 2006), and among described species is most close to M. abroscopi (see above) by having in males the following features: a bluntangular extension on the anterior margin of prodorsal shiled, a narrowly-trapezoidal terminal cleft, and a short spiniform seta d of tarsus IV sitting on small inflation. Montesauria phylloscopi differs from that species by the following features. In both sexes, the prodorsal and hysteronotal shields are without ornamentation; in males, the posterior end of sternum is connected to epimerites II by narrow transverse bands, setae h3 are 28–30 long and subequal to distance between their bases; in females, the lateral margins of prodorsal shield has deep incisions encompassing bases of setae se, and the anterior margin of lobar shield is straight. In both sexes M. abroscopi , the prodorsal and hysteronotal shields are covered by numerous small circular lacunae; in males, the posterior end of sternum is not connected to epimerites II, and setae h3 are 32–34 long and exceed the distance between their bases by 1.5 times; in females, the prodorsal shield has no lateral incisions, and the anterior margin of lobar shield is convex.

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

Figures

FIGURE 10. Montesauria phylloscopi sp. n., male. A — dorsal view, B — ventral view.

FIGURE 11. Montesauria phylloscopi sp. n., female. A — dorsal view, B — ventral view.

FIGURE 12. Montesauria phylloscopi 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.