Proaposolenidia bicolor, Hernandes, 2020

Hernandes, Fabio A., 2020, A review of the feather mite family Gabuciniidae Gaud & Atyeo (Acariformes Astigmata: Pterolichoidea) of Brazil, with descriptions of eleven new species, Zootaxa 4747 (1), pp. 1-53 : 20-24

Proaposolenidia bicolor sp. nov.

( Figs. 13–15 )

Type material. Holotype male (#4831), paratypes 27 males, 24 females and 8 nymphs (#4832–4870) ex Accipiter bicolor (Vieillot, 1817) ( Accipitriformes : Accipitridae ), specimen found dead after collision with glass panel, BRA- ZIL, State Park Intervales, Ribeirão Grande, SP, June, 2017, no further data.

Depositories: Holotype and most paratypes at UFSC, 2 male and 2 female paratypes at MGAB and ZISP.

MALE ( Figs. 13 , 15 A–E). (Holotype, range for five paratypes in parentheses). Gnathosoma roughly trapezoidal, length including palps 66 (57–71), greatest width at base 77 (70–77). Idiosoma length from anterior end to bases of setae h3 on lobar apices 382 (366–394), greatest width at level of humeral setae 225 (230–234); length of hysterosoma 368 (362–365). Prodorsal shield: occupying almost entire prodorsum, antero-lateral extensions protruding to margins of propodosoma between trochanters I and II and fused with epimerites Ia, antero-lateral margins heavily sclerotized and fused with anterior ends of scapular shields, lateral borders barely discernible, thin transverse band of unsclerotized area completely crossing the shield at level of scapular setae se and si, posterior part shaped as narrow transverse sclerite with sinuous posterior margin, greatest length including posterior piece 94 (88–94), width at posterior margin 110 (103–114). Setae vi setiform, 52 (52–60) long, slightly extending beyond tips of palps. Setae si 72 (63–72) long, as strong and robust as se. Distance between bases of scapular setae: se: se 71 (69–73), si: si 28 (27–33). Subhumeral setae c3 long setiform, length × width 115 (101–124) × 2. Hysteronotal shield: greatest length from anterior margins to bases of setae h3 212 (219–232), length along midline 132 (132–149), width at anterior margin 185 (150–185), anterior margin slightly convex, surface with faint reticulate ornamentation. Lateral bands distinct. Lobar areas of hysteronotal shield not separated from main body of this shield. Supranal concavity large, semicircular. Setae c2 spiculiform, 42 (42–48) long, situated off hysteronotal shield, cupules ia immediately postero-mesal to their bases, on anterior angles of hysteronotal shield. Setae e1 situated at level of hysteronotal gland openings gl. Terminal cleft with anterior part narrow, semiovate in shape, and with posterior part nearly two times wider; posterior parts of opisthosomal lobes bent medially. Length of terminal cleft from anterior end to lobar apices (bases of setae h3) 77 (68–80), width at level of setae h1 78 (71–95). Inner margins of opisthosomal lobe with triangular membranous projection on ledges of terminal cleft, with strong semicircular incision anterior to bases of setae h1, posterior ends of opisthosomal lobes with semicircular membranous extensions. Setae e2 spiculiform 52 (48–59) long, with apices surpassing level of setae h2; setae f2 lanceolate with apical filament, 55 (41–55) long, situated anterior to level of setae h2, setae h1 lanceolate, 30 (29–31) long, 5 (3–5) wide, situated between levels of setae h2 and h3. Distances between bases of dorsal setae and gland openings: c2: d2 83 (79–94), d2: e2 96 (90–100), e2: h3 52 (48–55), d2: gl 29 (25–34), h3: h3 123 (103–123), h2: h2 128 (114–128), d1: d2 28 (20–28), e1: e2 70 (66–70).

Epimerites I, II with inflated and heavily sclerotized bases. Basal parts of epimerites I connected with thick transverse bridge, their tips simple, not extending to bases of coxal setae 1a. Epimerites II slightly curved. Genital apparatus apex at level of trochanters IV, genital arch 17 (13–17) × 12 (11–12), aedeagus not extending to its base. Bases of setae 4a separated, situated at basal part of genital apparatus. Setae 4b slightly posterior to level of setae 3a. Setae g at level of anterior pair of genital papillae. Adanal shields present, as small roughly circular platelets posterior to setae 4a. Distances between ventral setae: 4b: g 40 (23–42), g: 4a 66 (47–66), 4a: ps3 28 (28–33), ps3: ps3 86 (84–86), 4a: 4a 17 (15–19). Adanal suckers 19 (16–19) in diameter, corolla with 14–15 rounded denticles.

Femora I, II without ventral crest. Seta cG of genu I spiculiform, 73 (69–78) long, exceeding combined length of genu and tibia. Solenidion σ 1 of genu I 17 (13–18) long, solenidion σ 2 absent. Solenidion σ of genu III situated in basal part of this segment. Solenidion φ of tibia IV shorter than corresponding tarsus. Tarsus IV with setae d and e minute spine-like. Legs IV with distal half of tarsus extending beyond level of lobar apices. Length of tarsi: I 48 (44–48), II 64 (59–65), III 75 (72–79), IV 76 (73–78). Ambulacral disc of tarsus I ovate and noticeably larger than roughly circular ambulacra of tarsi II–IV. Length of solenidia: σ1 I 17 (13–18), σ II 8 (5–8), σ III 12 (8–12), ω1 I 13 (12–14), ω1 II 30 (22–30).

FEMALE ( Figs. 14 , 15F, G ) (range for five paratypes). Gnathosoma, length × width, 69–80 × 78–87. Idiosoma, length × width, 418–441 × 273–290, length of hysterosoma 288–297. Prodorsal shield generally shaped in male, except lateral borders clearly distinct and not fused with scapular shields, 100–105 × 116–134. Setae vi setiform, 55–64 long, extending beyond tips of palps. Setae si 81–94 long, as strong and robust as se. Distance between bases of scapular setae: se: se 81–83, si: si 33–36. Subhumeral setae c3 long setiform, length × width 117–143 × 2. Hysteronotal shield: entire, with slightly concave anterior margin, anterior angles acute, extending to posterior margin of opisthosoma at level of setae e2, posterior margin with a pair of ovate unsclerotized areas around setae h1, greatest length 172–181, width at anterior margin 175–185, anterior half with faint reticulate ornamentation, middle part with longitudinal striations. Lateral bands well developed. Setae c2 spiculiform, 66–74 long, situated off hysteronotal shield; cupules ia postero-mesal to them and also off this shield. Setae d2 short piliform, 19–29 long. Setae e1 approximately at level of hysteronotal gland openings gl and cupules im. Posterior margin of hysteronotal shield between setae f2 strongly sclerotized. Posterior margin of opisthosoma almost semi-rounded. Setae e2 setiform, length × width 57–63 × 1, setae f2 short piliform 23–39 long, setae h1 short piliform, 5–8 long. Distances between dorsal setae and gland openings: c2: d2 95–108, d2: e2 112–134, e2: h3 38–52, d2: gl 26–42, h1: h1 53–59, h2: h2 61–69, h3: h3 46–49.

Epimerites I, II as in males. Epigynum horseshoe-shaped, 31–38 long, 63–72 wide. Setae 4b situated off epigynum, posterior to its tips. Setae 4a situated between levels of anterior and posterior genital papillae. Copulatory opening terminal, distant from anal opening. Distances between ventral setae: 4b: g 50–54, 4b: 3a 28–39, g: 4a 14– 19, ps2: ps3 16–21, ps2: ps2 54–57.

Femora I, II without ventral crests. Setae cG of genu I long spiculiform, 75–90 long, slightly longer than combined length of genu and tibia I. Legs IV with tarsus and distal part of tibia extending beyond posterior end of opisthosoma. Length of tarsi: I 48–53, II 68–75, III 87–102, IV 100–106. Length of solenidia: σ1 I 19–23, σ II 6–9, σ III 13–15, ω1 I 11–15, ω1 II 25–33.

Differential diagnosis. The new species, Proaposolenidia bicolor sp. nov., resembles P. accipitris Mironov & Proctor, 2007 in having, in males, setae c1 on or near the anterior border of the hysteronotal shield, setae h1 short and not extending to midline of the body, and the genital papillae situated closer to setae g than to setae 4a. The new species can be distinguished from P. accipitris based on the following characters. In both sexes: setae vi, relatively longer and extending to or beyond apices of palps; setae si extending beyond the level of setae c1; the presence of a transverse prodorsal shield fragment posterior to setae se and si. In females: setae e2 are about twice longer than f2, surpassing body terminus. In both sexes of P. accipitris , setae vi are short and only reach the midlength of the subcapitulum; setae si do not reach the level of setae c1; the prodorsal shield fragment posterior to setae se and si is absent; in females, setae e2 are relatively shorter, about as long as f2 and barely reach the bases of the latter setae.

Etymology. The species name is taken from the specific epithet of the type host, Accipiter bicolor .

Figures

FIGURE 13. Proaposolenidia bicolor sp. nov., male: dorsal (A) and ventral (B) views.

FIGURE 14. Proaposolenidia bicolor sp. nov., female: dorsal (A) and ventral (B) views.

FIGURE 15. Proaposolenidia bicolor sp. nov.: genu, tibia and tarsus I–IV of male (A–D), dorsal opisthosoma of male (E), tarsus IV of female (F), spermatheca of female (G).