Aniibius guirae, Mironov, Sergey V., Hernandes, Fabio A. & Pedroso, Luiz Gustavo A., 2015

Mironov, Sergey V., Hernandes, Fabio A. & Pedroso, Luiz Gustavo A., 2015, New feather mites of the genera Aniacarus and Aniibius (Acariformes: Pterolichidae) from two cuckoo species (Cuculiformes: Cuculidae) in Brazil, Zootaxa 3937 (1), pp. 103-126 : 121-125

Aniibius guirae sp. n.

( Figs. 13–15 )

Type material. Male holotype (DZUNESP-RC # 2373), 17 male and 14 female paratypes from Guira guira (Cuculidae) , BRAZIL, São Paulo State, Campinas, Universidade Estadual de Campinas (UNICAMP), 22°50’S 47°02’W, September 2010, D.V. Boas-Filho col. (#828).

Depository. Holotype, 14 male and 12 female paratypes—DZUNESP-RC, 3 male and 3 female paratypes—ZISP.

Description. MALE (holotype, range for 5 paratypes in parentheses). Gnathosoma almost rectangular, length × width, 36 (30–40) × 22 (22–30). Idiosoma length from anterior end to lobar apices 230 (225–240), greatest width at level of setae c2 120 (110–130), length of hysterosoma 150 (150–155). Prodorsal shield: occupying almost entire prodorsum, lateral margins without incisions, posterior margin concave in medial part, greatest length 74 (68–74), width at level of posterior angles 88 (84–88). Setae vi much shorter than chelicerae; setae si filiform, minute, about 10 long; bases of macrosetae se separated by 47 (45–48). Setae c2 filiform 15 (12–20) long, situated in anterior ends of humeral shields. Subhumeral setae c3 lanceolate, 13 (10–15) long. Hysteronotal shield: anterior margin concave, greatest length from anterior margins to lobar apices 140 (140–145), width at anterior margin 105 (95–105), posterior end with pear-shaped supranal concavity and with 10–15 small lacunae of irregular form. Cupules ia situated at level of setae c2, cupules im slightly anterior to level of setae d2. Hysteronotal glands opening gl poorly distinct, situated anterior to setae e2. Opisthosomal lobes short widely rounded; terminal cleft small, shallowly concave, 6 (6–9) long, posterior margin of lobes and terminal cleft with narrow entire membrane with greatest width on lobar apices about 15. Setae ps1 short filiform, 12 (11–15); setae f2 spiculiform 22 (22–26); setae ps2 65 (60–75) long. Distances between hysteronotal setae: c2:d2 57 (55–65), d2: e2 45 (38–50), e2:h3 32 (25–35), d1:d2 26 (20–26), e1: e2 23 (20–30), h1:h3 15 (15–21), h2:h2 45 (40–45), h3:h3 26 (23–26), ps1:ps1 12 (10–12), ps2:ps2 60 (53–61).

Epimerites I fused into a Y, sternum about 1/3 of total length of epimerites. Genital apparatus 19 (19–22) long, 11 (10–15) in width at base, situated at level of trochanters III. Setae 4b situated posterior to setae 3a. Setae g situated at level of genital apparatus apex, genital papillae situated at midlevel of genital apparatus and strongly reduced (in some specimens indistinct) ( Fig. 15 E). Distances between ventral setae: 3a:4b 5 (5–6), 4b:g 14 (12–19), g:4a 25 (25–30), ps3:h3 26 (22–26). Adanal suckers 7 (7–8) in diameter, corolla without indentations.

Segments of legs I–IV not modified. Ambulacral disc I slightly asymmetric, its distal margin with blunt paraxial extension, central sclerite symmetric ( Fig. 15 A). Solenidion σ1 of genu I approximately 1.5 times longer than this segment. Solenidion σ1 on genu II absent. Setae mG of genua II nearly times as long as setae mG of genua I. Solenidion φ of tibia IV slightly longer than corresponding tarsus. Setae d, e of tarsus IV short stick-like. Length of tarsi: I 16 (13–17), II 15 (11–17), III 25 (20–25), IV 26 (22–28). Length of tarsal solenidia: ω1 I 8 (6–8), ω 1 II 13 (12–16).

FEMALE (range for 5 paratypes). Gnathosoma, length × width, 48–51 × 34–40. Idiosoma, length × width, 305–310 × 145–155, length of hysterosoma 205–215. Prodorsal shield shaped as in male, 85–88 × 95–105. Setae vi much shorter than chelicerae, setae si filiform, about 10 long, macrosetae se separated by 50–55. Setae c2 filiform, 15–17 long, situated in anterior ends of humeral shields. Subhumeral setae c3 lanceolate, 13–18 long, about 5 wide. Hysteronotal shield split into anterior hysteronotal and pygidial parts by wide transverse band of striated tegument between levels of setae e2 and f2 ( Fig. 14 A); anterior hysteronotal shield with nearly straight anterior margin and with rounded posterior margin, 150–160 long, 115–125 wide, without ornamentation. Hysteronotal gland openings gl on lateral margins of hysteronotal shield, approximately at level of setae e1. Pygidial shield shaped as transverse plate with semicircular incision on anterior margin (supranal concavity), 23–27 long, 60–67 wide. Setae e2, f2,h1, ps1, and ps2 filiform, 10–15 long. Copulatory opening immediately posterior to anal opening. Spermatheca and spermaducts as in Fig. 15 G. Distances between dorsal setae: c2:d2 65–71, d2: e2 64–73, e2:h3 47–55, d1:d 2 25–32, e1: e 2 18–28, h1:h 3 17–23, h1:h 1 19–22, h2:h2 50–55, h3:h 3 27–33, ps1:ps 1 10–14.

Epimerites I as in male. Epigynum crescent-shaped, 10–11 long, 19–22 wide. Apodemes of egg-laying opening (oviporus) rudimentary. Setae g situated slightly posterior to level of setae 3a. Distances between ventral setae: 4b:g 30–40, g:4a 35–40.

Legs I–III as in male, except for presence of vestigial solenidion σ1 on genu II ( Fig. 15 F). Solenidion φ of tibiae IV about ¼ of this segment. Length of tarsi: I 17–20, II 17– 20, III 28–30, IV 34 –36. Length of tarsal solenidia: ω1 I 8–10, ω 1 II 13–15.

Differential diagnosis. The new species Aniibius guirae sp. n. differs from A. drepanophorus Gaud and Atyeo, 1990 by having the following features: in males, setae ps1 are filiform, setae f2 are spiculiform, and the anterior end of genital apparatus does not extend to the level of epimerites IIIa ( Figs. 13 A, 15E); in females, the hysteronotal shield is split by a wide area of striated tegument into an anterior hysteronotal piece (proper hysteronotal shield) and the pygidial shield, setae e1 are situated approximately at the level of the hysteronotal gland openings gl, and setae ps1 are situated on the posterior margin of opisthosoma, at the level of macrosetae h3. In males of A. drepanophorus , setae ps1 are foliform, setae f2 are narrowly lanceolate, and the anterior end of the genital apparatus extends to the level of epimerites IIIa; in females, the hysteronotal shield is entire, setae e1 are situated anterior to the level of the openings gl, and setae ps1 are situated at the level of setae h2.

Remark. In the original description of the previously known A. drepanophorus , the authors of this species stated that the supranal concavity in males is absent ( Gaud and Atyeo 1990). However, they depicted on the ventral side of the male a well sclerotized ovate structure between the adanal suckers, that is quite certainly a supranal concavity rather than the anal opening, which is always slit-like in astigmatan mites.

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

Figures

FIGURE 13. Aniibius guirae sp. n., male. A — dorsal view, B — ventral view.

FIGURE 14. Aniibius guirae sp. n., female. A — dorsal view, B — ventral view.

FIGURE 15. Aniibius guirae sp. n., details. A – D — legs I – IV of male, respectively, E — genital apparatus, F — genu II of female, G — spermatheca. Scale bars: A – F — 50 µm, G — 25 µm.