Aniacarus coronatus, 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 : 117-121

Aniacarus coronatus sp. n.

( Figs. 10–12 )

Type material. Male holotype (DZUNESP-RC #2366), 6 male and 3 female paratypes from Guira guira ( Cuculiformes : 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); 1 male paratype, same host, BRAZIL, Rio Grande do Sul, Pelotas, 41°46’S 52°20’W, 30 October 2006, F.M. Lambrecht.

Depository. Holotype, 4 male and 2 female paratypes—DZUNESP-RC, 3 male and 1 female paratypes—ZISP.

Description. MALE (holotype, range for 5 paratypes in parentheses). Gnathosoma almost rectangular, length × width, 72 (65–74) × 64 (62–68); dorsal surface of cheliceral body with curved crest of acute spines ( Fig. 12 ).

Idiosoma, length × width, 375 (355–390) × 200 (185–220); length of hysterosoma 245 (235–250). Prodorsal shield: occupying almost all prodorsum, postero-lateral angles well developed, length along midline 108 (105–115), width at posterior margin 143 (140–150). Setae vi filiform, approximately half as long as chelicerae, their bases separated by 32 (32–40); setae si spiculiform, 22 (17–22) long; setae se separated by 108 (105–110). Setae c2 spiculiform, 21 (21–23) long, situated on striated tegument near anterior angles of humeral shields. Subhumeral setae c3 lanceolate, 16 (15–20) long. Hysteronotal shield: greatest length from anterior margins to bases of setae h3 220 (220–230), width at anterior margin 155 (155–170), anterior margin nearly straight, surface with poorly distinct ornamentation of small lacunae. Hysteronotal gland openings gl situated anterior to levels of setae e2. Supranal concavity present, ovate. Opisthosomal lobes short and wide, bluntly rounded, terminal cleft small shallowly concave, 17 (15–18) long. Setae e1 situated anterior to level of openings gl. Setae e2 short filiform, 31 (15–31) long; setae f2 and ps1 lanceolate, 48 (45–54) and 34 (32–37) long, respectively; setae ps2 57 (60–75) long. Distances between dorsal setae: c2:d2 85 (85–95), d2: e2 68 (63–70), e2:h3 72 (67–75), d1:d2 (26 (25–40), e1: e2 24 (23–33), h1:h3 43 (35–43), h2:h2 87 (79–85), h3:h3 59 (54–60), ps1:ps1 26 (26–32), ps2:ps2 105 (95–105).

Epimerites I fused into a Y, sternum about 1/2 of total length of epimerites. Posterior end of sternum and tips of epimerites II with small sclerotized plates of irregular form. Genital apparatus 25 (23–25) × 22 (19–21), situated between levels of trochanters III and IV. Setae 4b slightly anterior to level of setae 3a. Setae g situated anterior to genital apparatus apex, genital papillae at level of anterior half of this apparatus. Distances between ventral setae: 4b:g 7 (7–10), g:4a 32 (29–32), g:4a 39 (38–42), ps3:h3 51 (46–51). Adanal suckers 15 (15–16) in diameter, with radial striation; corolla smooth.

Genu I with dorsal longitudinal crest bearing fine indentations; femur I with two dorsal spines and with two dorsal crests (longitudinal and oblique ones) ( Figs. 12 A, D). Legs II without modified segments. Solenidion σ1 of genu I approximately 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 21 (21–28), II 23 (23–29), III 34 (34–36), IV 42 (40–43). Length of tarsal solenidia: ω 1 I 15 (11–16), ω 1 II 20 (18–23).

FEMALE (range for 3 paratypes). Gnathosoma, length × width, 69–75 × 56–64. Idiosoma, length × width, 450–460 × 215–230, length of hysterosoma 320–330. Prodorsal shield shaped as in male, 105–110 × 140–145. Setae vi approximately half as long as chelicerae, separated by 28–31; setae si spiculiform, 14–16 long, setae se separated by 100–105. Setae c2 filiform, 18–23 long, situated on striated tegument near anterior angles of humeral shields. Subhumeral setae c3 lanceolate, 15–18 long. Hysteronotal shield: length 300–310, width 165–175, anterior margin straight, surface without ornamentation. Supranal concavity present, circular. Hysteronotal gland openings gl situated anterior to level of setae e2. Five pairs of opisthosomal setae spiculiform: h 1 23–28, e 2 25 –35, f2 36–40, ps 1 24–25, ps2 33–35 long. External copulatory tube terminal, about 5 long; spermatheca and spermaducts as in Fig. 12 F. Distances between dorsal setae: c2:d2 100–110, d2:e2 120–125, e2:h3 75–80, d1:d2 32–40, e1: e2 60–68, h1:h3 49–55, h1:h1 50–56, h2:h2 75–82, h3:h3 48–52, ps1: ps 1 28–30.

Epimerites I as in male; posterior end of sternum and tips of epimerites II without sclerotized plates. Epigynum thick almost semicircular, 27–35 × 47–50. Apodemes of egg-laying opening rudimentary. Setae g situated slightly posterior to levels of setae 3a. Distances between ventral setae: 4b:g 17–22, g:4a 47–55.

Legs I without modified segments, legs II, III as in male. Solenidion φ of tibiae IV about 1/3 of this segment. Length of tarsi: I 27–35, II 28–33, III 43 –45, IV 54 –55. Length of tarsal solenidia: ω 1 I 14–17, ω 1 II 18–19.

Differential diagnosis. Females of the new species, A. coronatus sp. n., are most similar to those of A. simplex and A. robustus by having setae f2 and ps2 narrowly lanceolate, while males of this species have unique features of chelicerae and legs I easily differing them from previously known A. mexicanus and three other new species described herein. Males of A. coronatus differ from other known species by the following unique features: cheliceral bodies have a curved dorsal crest consisting of acute spines directed backward, genu I bears a longitudinal dorsal crest with small indentations, and femur I has two dorsal spines and two smooth crests ( Figs. 12 D, E). In all other Aniacarus species, the listed features are absent. Additionally, males of A. coronatus differ from those of other species by foliform curved setae ps1 (vs filiform in A. mexicanus , spiculiform in A. simplex , narrowly lanceolate in A. robustus , and lanceolate with filiform apex in A. ani ). Females of A. coronatus are distinguished from those of A. mexicanus and the three other new species species by having narrowly lanceolate setae ps1 and by the absence of any ornamentation on the hysteronotal shield. In females of other Aniacarus species, setae ps1 are filiform, and the posterior part of the hysteronotal shield has a large poorly sclerotized area with longitudinal or transverse striation.

Etymology. The specific epithet refers to crown-like indentations on chelicerae in males.

Figures

FIGURE 10. Aniacarus coronatus sp. n., male. A — dorsal view, B — ventral view.

FIGURE 11. Aniacarus coronatus sp. n., female. A — dorsal view, B — ventral view.

FIGURE 12. Aniacarus coronatus sp. n., details. A — leg I of male, B — leg II of male, C — tibia and tarsus IV of male, D — femur, genu and tibia I of male, E — gnathosoma of male, dorsal view, F — spermatheca.