Strelkoviacarus brasiliensis Pedroso & Hernandes 2018, sp. nov.
Creators: name: Pedroso, Luiz Gustavo A.
name: Hernandes, Fabio Akashi
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Astigmata
Analgidae
Strelkoviacarus
Strelkoviacarus brasiliensis

description: Strelkoviacarus brasiliensis Pedroso & Hernandes sp. nov.
(Figs. 4–6)
Type material. Holotype male; paratypes 3 males and 11 females ex Zonotrichia capensis (Müller, 1776) (Passeriformes: Passerellidae), BRAZIL, São Paulo State, Campinas, 26.II.2010, D.V. Boas-Filho col. (#664). Paratypes 1 male and 2 females ex Z. capensis, Brazil, São Paulo State, Campinas, Sítio Nishimura, 19.VIII.2009, David V. Boas-Filho col. (#546).
Type depositories. Holotype male (#4208) and paratypes (#4209–4223)—DZUnesp-RC; remaining paratypes—ZISP and MGAB.
Description. Male (holotype, range for 4 paratypes in parentheses) (Figs. 4, 6A–D): Idiosomal length 282 (260–269), width 173 (161–166). Gnathosoma with convex lateral margins, length 51 (45–46), width 47 (46). Prodorsal shield: entire, slightly enlarged posteriorly, posterior margin between bases of scapular setae convex, length along midline 78 (74–76), greatest width 68 (66–70), distance between setae se 59 (51–58). Scapular shields wide, extending to bases of setae cp. Humeral shields absent. Setae cp and c2 on striated tegument. Lateral margin of propodosoma between trochanters I and II without spine. Length of hysterosoma from sejugal furrow to posterior margin of body 194 (177–181). Hysteronotal shield short, with convex and rough anterior margin extending to level of setae e2; length along midline 54 (40–51), width at level of setae e2 133 (127–129). Opisthosoma with a pair of short and rounded opisthosomal lobes, with setae h2 and h3 situated on their posterolateral margins and apices, respectively; length of terminal cleft 16-18. Setae d2 and e2 on striated tegument. Hysteronotal gland openings gl situated anteriorly to bases of setae e2. Distance between prodorsal and hysteronotal shield 123 (117–126). Distance between dorsal setae: c2: d2 49 (48–50), d2: e2 63 (61–62), e2: h3 54 (59–61), h2: h2 111 (106–110), h3: h3 89 (86–87). Lateral area of coxal fields II and III without sclerotization; tips of epimerites III and IIIa not connected. Coxal fields III not closed. Epimerites IVa absent. Genital arch at level of trochanters III, 18 (18–20) × 21 (21–22); genital shield present, represented by a U-shaped sclerite encompassing bases of setae g; genital papillae rudimentary, situated at level of genital arch apex. Adanal shields represented by two large sclerotized plates tending to collapse at their anterior ends, almost completely encircling anal field and bearing bases of setae ps3, ps2, f2 and ps1. Setae f2 and ps2 subequal in length. Adanal apodemes and adanal membranes absent. Anal suckers well developed. Distance between ventral setae: 3a: g 21 (21–23), g: 4a 14 (10– 13), 4a: ps3 67 (52–55), ps3: ps3 25 (25–26). Femur I with rounded lateral margin. Tibiae I and II with a pair of short ventral spines. Legs III slightly hypertrophied. Tarsus III with large, claw-like apical process. Trochanter IV without setae sR. Tarsus IV with all setae filiform, including dorso-apical setae d and e. Length of solenidia: ω 1 I 25 (25–27), ω 1 II 31 (30), σ 1 I 49 (47–50), σ II 21 (19–24), σ III 29 (26–32).
Female (range for 8 paratypes) (Figs. 5, 3E–G): Idiosoma, length × width, 385–407 × 187–235. Gnathosoma 46–53 × 50–54. Prodorsal shield: similar to that of male, with posterior angles noticeably larger, length along midline 74–90, greatest width 78–85; setae se separated by 70–73. Scapular shields represented by large transverse plates. Humeral shields absent. Setae cp and c2 on striated tegument. Lateral margin of propodosoma between trochanters I and II without spine. Length of hysterosoma 230–283. Dorsal hysterosoma without shields (Fig. 5A). Distance between dorsal setae c2: d2 47–61, d2: e2 75–96, e2: h3 80–123, h3: h3 86–99, h2: h2 131–137. Epigynum fused with epimerites I, forming a thick H-shaped structure, its width at midlevel 29–36. Inner tips of epimerites III and IIIa not touching each other. Epimerites IVa absent. Apodemes of ovipore fused with tips of epimerites IIIa. Adanal shields wide, represented by two plates with anterior ends tending to collapse with each other, but not fused, length 90–104, greatest width 134–146. Setae ps3 on the striated tegument slightly anterior to anal opening; setae ps2 and f2 approximately at same transverse level, encompassed by the adanal shield. Distance between ventral setae: 3a: 4b 25–31, 4b: g 18–22. Head of spermatheca striated, primary spermaduct without enlargements, secondary spermaducts short (Fig. 6G). Legs I and II as in male. Length of solenidia: ω 1 I 22–26, ω 1 II 19–25, σ 1 I 48–58, σ II 21–28, σ III 24–32. Solenidion σ 1 III equal in length to genu III.
Differential diagnosis. Strelkoviacarus brasiliensis sp. nov. closely resembles S. critesi; in both species, males have well developed adanal suckers (absent in S. holoaspis), and both sexes lack any sclerotization around dorsal setae c2 (present in S. quadratus). It can be distinguished from S. critesi by the following characters: in males of S. brasiliensis, the anterior parts of the adanal shields are convergent and encompass the bases of setae ps3, the tips of epimerites III and IIIa are not connected, and the sclerotized areas of coxal fields III are shaped as a narrow triangle and do not touch the bases of setae 3a. In males of S. critesi, the anterior ends of adanal shields are divergent and do not encompass the bases of setae ps3, the tips of epimerites III and IIIa are connected (coxal fields III closed), and the sclerotized area on coxal field III is wider and touch the bases of setae 3a. Females of S. critesi and S. brasiliensis are very similar, however, in S. brasiliensis, the median extension of the prodorsal shield is longer, the opisthosomal shield is absent, and many of dorsal setae are relatively shorter—setae vi are about half the length of the prodorsal shield, setae c2 barely reach the bases of d2, setae d2 do not reach the bases of e2, and setae e2 do not reach the end of opisthosoma. In females of S. critesi, the posterior margin of the prodorsal shield is widely rounded,
opisthosomal shields are present and roughly triangular in shape, setae vi are as long as the prodorsal shield, setae c2 reach the level of setae d2, setae d2 reach e2, and setae e2 reach the end of the opisthosoma.
Etymology. The specific epithet is derived from the country where this species was found.
description: Published as part of Pedroso, Luiz Gustavo A. & Hernandes, Fabio Akashi, 2018, Two new feather mite species of the family Analgidae (Acariformes: Analgoidea) from the Rufous-collared Sparrow Zonotrichia capensis (Müller, 1776) (Passeriformes: Passerellidae), pp. 233-244 in Zootaxa 4461 (2) on pages 239-241, DOI: 10.11646/zootaxa.4461.2.4, http://zenodo.org/record/1459932