Aniacarus robustus, 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 : 114-117

Aniacarus robustus sp. n.

( Figs. 7–9 )

Type material. Male holotype (DZUNESP-RC #2350), 5 male and 4 female paratypes from Guira guira ( Cuculiformes : Cuculidae ), BRAZIL, São Paulo State, Campinas, Rodovia SP-340, 22°50’S 47°02’W, 11 May 2010, D.V. Boas-Filho col. (#722); other paratypes: 2 males, same host species and collector, BRAZIL, São Paulo State, Campinas Universidade Estadual de Campinas (UNICAMP), September 2010, (#828); 3 male and 2 female, same host species and collector, BRAZIL, São Paulo State, Amparo, 22°42’S 46°45’W, 10 March 2007, (#155); 1 male and 1 female, same host species, BRAZIL, São Paulo State, Araras, SP- 191 km 132, 22°22’S 47°15’W, 25 February 2014, G.O. Almeida col.; 2 female, same host species, BRAZIL, Minas Gerais State, Lavras, 21°13’S 44°58’W, 26 February 2014, L.F.O. Bernardi col.

Depository. Holotype, 9 male and 6 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, 50 (50–63) × 53 (53–67). Idiosoma, length width, 325 (325–360) × 235 (235–245); length of hysterosoma 230 (230–245). Prodorsal shield: occupying almost all prodorsum, postero-lateral angles well developed, length along midline 78 (78–84), width at posterior margin 110 (110–140). Setae vi filiform, slightly shorter than chelicerae, their bases separated by 26 (26–29); setae si minute filiform, about 10; setae se separated by 85 (85–95).

Setae c2 filiform, 12 (10–15) long, situated on striated tegument near anterior angles of humeral shields. Subhumeral setae c3 spiculiform, 13 (13–20) long. Hysteronotal shield: greatest length from anterior margins to bases of setae h3 210 (210–220), width at anterior margin 180 (180–200), anterior margin nearly straight, surface with poorly distinct network ornamentation. Hysteronotal gland openings gl situated anterior to levels of setae e2. Supranal concavity present, ovate. Lateral margins of opisthosoma between setae e2 and f2 with small shallow concavities. Opisthosomal lobes short and wide, widely rounded on apex, terminal cleft wider than long, nearly semicircular in shape, 23 (18–23) long. Setae e1 situated far anterior to level of setae e2, approximately at level of cupules im. Setae e2 short filiform, 15 (12–15) long, setae f2 and ps1 lanceolate, 45 (45–50) and 57 (53–58) long, respectively; setae ps2 87 (80–90) long. Distances between dorsal setae: c2:d2 91 (90–105), d2: e2 65 (51–67), e2:h3 60 (55–63), d1:d2 30 (30–45), e1: e2 52 (52–60), h1:h3 36 (35–40), h2:h2 105 (100–110), h3:h3 70 (65–70), ps1:ps1 48 (45–50), ps2:ps2 125 (125–135).

Epimerites I fused into a Y, sternum about 1/4 of total length of epimerites. Genital apparatus 20 (20–25) × 18 (14–20), extending by anterior half beyond level of epimerites IIIa. Setae 4b slightly anterior to level of setae 3a. Setae g situated at level of genital apparatus apex, genital papillae at midlevel of this apparatus. Distances between ventral setae: 4b:g 5 (5–12), and g:4a 38 (35–45). Adanal suckers 17 (17–19) in diameter, with radial striation, corolla with 14–16 fine indentations ( Fig. 9 D).

Legs I, II without modified segments. Solenidion σ1 of genu I 1.2–1.3 times longer than this segment. Setae mG of genua I, II subequal in length. Solenidion φ of tibia IV slightly longer than corresponding tarsus. Setae d, e of tarsi IV button-like, poorly sclerotized. Length of tarsi: I 25 (25–29), II 27 (27–29), III 36 (36–40), IV 40 (37–41). Length of tarsal solenidia: ω 1 I 10 (10–14), ω 1 II 15 (12–15).

FEMALE (range for 5 paratypes). Gnathosoma, length × width, 73–80 × 65–70. Idiosoma, length × width, 410–440 × 255–285, length of hysterosoma 295–315. Prodorsal shield shaped as in male, 90–100 × 110–135. Setae vi slightly shorter than chelicera, separated by 33–35, setae si filiform, about 10 (7–11) long, setae se separated by 100–110. Setae c2 filiform, 15–20 long, situated on striated tegument near anterior angles of humeral shields. Subhumeral setae c3 spiculiform, 19–25 long. Hysteronotal shield: length 275–290, width 185–210, anterior margin slightly convex, anterior part with ornamentation of small ovate lacunae, posterior part with roughly Hshaped poorly sclerotized area and having longitudinal and transverse striae. Supranal concavity present, circular. Hysteronotal gland openings gl situated at level of setae e2 or slightly posterior. Four pairs of opisthosomal setae spiculiform: e 1 15 –18, h 1 21–24, f 2 26–32, ps 2 20–24 long. Setae e2 and setae ps1 filiform, 14–18 and 31–39 long, respectively. External copulatory tube terminal, shaped as a minute cone. Spermatheca and spermaducts as in Fig. 9 E. Distances between dorsal setae: c2:d2 100–115, d2: e2 70–90, e2:h3 95–105, d1:d2 34–55, e1: e 2 18–23, h1:h3 62–77, h1:h 1 30–38, h2:h2 58–65, h3:h3 33–44, ps1: ps 1 20–22.

Epimerites I as in male. Epigynum thick bow-shaped, 18–22 × 40–53 wide. Apodemes of egg-laying opening rudimentary. Setae g situated slightly posterior to levels of setae 3a. Distances between ventral setae: 4b:g 25–32, g:4a 50–65.

Legs I–III as in male. Solenidion φ of tibiae IV about 1/3 of this segment. Length of tarsi: I 29–34, II 28–34, III 47 –50, IV 62 –65. Length of tarsal solenidia: ω 1 I 10–15, ω 1 II 16–19.

Differential diagnosis. Aniacarus robustus sp. n. differs from the most similar species, A. simplex sp. n. (described above), by the following features: in both sexes, the idiosoma is noticeably widened (body length/width ratio 1.3–1.5); in males, setae f2 and ps1 are narrowly lanceolate (about 5 µm in width), and the distance between bases of setae ps1 is 45–50 µm; in females, setae e1 are thin spiculiform, the posterior part of hysteronotal shield with roughly H-shaped poorly sclerotized area with transverse striae. In both sexes of A. simplex , the idiosoma is noticeably elongated (body length/width ratio 1.6–1.8) males, setae f2 and ps1 are spiculiform, and the distance between bases of setae ps1 is about 25–35 µm; in females, setae e1 are minute filiform, the posterior part of hysteronotal shield with roughly ovate poorly sclerotized area with striation.

Etymology. The specific epithet robustus (L. strong) refers to the wide and massive general appearance of this species, in comparison to other known Aniacarus species.

Figures

FIGURE 7. Aniacarus robustus sp. n., male. A — dorsal view, B — ventral view.

FIGURE 8. Aniacarus robustus sp. n., female. A — dorsal view, B — ventral view.

FIGURE 9. Aniacarus robustus sp. n., details. A — leg I of male, B — leg II of male, C — tibia and tarsus IV of male, D — adanal sucker, E — spermatheca.