Coraciacarus cabure, 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 : 45-49

Coraciacarus cabure sp. nov.

( Figs. 31–33 )

Type material: Male holotype (#5022), 9 male and 9 female paratypes (#5023–5040) ex Micrastur ruficollis (Vieillot, 1817) ( Falconiformes : Falconidae ), roadkilled specimen, BRAZIL, São Paulo State, Itirapina, September 2016, A. Fontanella col.

Depositories: Holotype and paratypes at UFSC.

MALE ( Figs. 31 , 33 A–D, F). (Holotype, range for five paratypes in parentheses). Gnathosoma roughly trapezoidal, length including palps 62 (58–63), greatest width at base 64 (56–63). Idiosoma length from anterior end to bases of setae h3 on lobar apices 409 (393–407), greatest width at level of humeral setae 222 (181–196); length of hysterosoma 312 (296–325). Prodorsal shield: antero-lateral extensions protruding to margins of propodosoma between trochanters I and II, not fused with epimerites Ia, antero-lateral margins heavily sclerotized, lateral margins with narrow and deep incisions encircling bases of setae se and touching bases of si, posterior margin slightly sinu- ous, greatest length 95 (92–102), width at posterior margin 130 (123–131). Setae vi piliform, 25 (23–38) long, not reaching bases of palps. Setae si short piliform, 9 (8–15) long. Distance between bases of scapular setae: se: se 66 (59–68), si: si 42 (34–43). Subhumeral setae c3 lanceolate, length × width 19 (19–23) × 7 (6–7). Hysteronotal shield: greatest length from anterior margins to bases of setae h3 296 (281–307), length along midline 195 (184–203), width at anterior margin 185 (175–182), anterior margin slightly concave, surface with very faint reticulate orna mentation, and medial longitudinal striation on the posterior half. Lateral bands distinct. Lobar areas of hysteronotal shield not separated from main body of hysteronotal shield. Supranal concavity not developed. Setae c2 thin piliform, 15 (10–15) long, situated in anterior angles of hysteronotal shield, cupules ia immediately postero-mesal to their bases. Setae e1 situated at level of hysteronotal gland openings gl. Length of terminal cleft from anterior end to lobar apices (bases of setae h3) 71 (65–84), width at level of setae h1 85 (70–81). Terminal cleft roughly trapezoidal in shape, inner margin of opisthosomal lobes moderately sclerotized, with gentle curve anterior to bases of setae h1, posterior ends of opisthosomal lobes with small membranous extensions. Setae e2 narrowly lanceolate 20 (14–20) long, with apices extending only halfway to bases of setae h2; setae f2 narrowly lanceolate, 15 (14–16) long, situated slightly posterior to setae h2, setae h1 narrowly lanceolate, 11 (11–14) long, 3 (2–4) wide, situated slightly posterior to level of setae h2. Distances between bases of dorsal setae and gland openings: c2: d2 87 (74–93), d2: e2 165 (144–165), e2: h3 51 (47–52), d2: gl 69 (58–70), h3: h3 115 (117–115), h2: h2 115 (106–115), d1: d2 10 (13–19), e1: e2 92 (87–100).

Epimerites I, II without inflated bases. Epimerites I with tips simple, not extending to bases of coxal setae 1a.

Epimerites II amost straight, only tips slightly curved. Genital apparatus posterior to level of trochanters IV, genital arch 28 (26–28) × 19 (26–29), aedeagus not extending to its base. Bases of setae 4a separated. Setae 4b slightly posterior to level of setae 3a. Setae g anterior to level of genital papillae. Distances between ventral setae: 4b: g 33 (33–45), g: 4a 79 (67–78), 4a: ps3 34 (33–37), ps3: ps3 99 (98–105), 4a: 4a 12 (10–12). Adanal suckers 21 (18–23) in diameter, corolla with 14–18 rounded denticles.

Femora I, II without ventral crest. Seta cG of genu I spiculiform, 14 (14–18) long, about half as long as genu. Solenidion σ 1 of genu I 18 (15–18) long, much longer than solenidion σ 2. Solenidion σ of genu III situated in basal part of this segment. Solenidion φ of tibia IV shorter than corresponding tarsus. Tarsus IV with seta d minute spinelike, seta e piliform. Legs IV with ambulacrum extending to level between bases of setae e2 and f2. Length of tarsi: I 41 (40–46), II 52 (44–52), III 54 (46–54), IV 54 (48–58). Ambulacral discs truncated at the distal margins, with a minutely serrated edge; discs of tarsus I roughly circular and slightly larger than those of tarsi II–IV. Length of solenidia: σ1 I 18 (15–18), σ II 8 (5–8), σ III 8 (7–9), ω1 I 15 (10–15), ω1 II 21 (19–21).

FEMALE ( Figs. 32 , 33E, G ) (range for five paratypes). Gnathosoma, length × width, 77–82 × 77–85. Idiosoma, length × width, 486–530 × 215–269, length of hysterosoma 370–389. Prodorsal shield shaped as in male, 103–107 × 147–154. Setae vi thin piliform, 24–34 long, barely reaching bases of palps. Setae si piliform, 10–12 long. Distance between bases of scapular setae: se: se 73–76, si: si 46–50. Subhumeral setae c3 lanceolate, length × width 23–24 × 7–8. Hysteronotal shield: almost completely split into main body and opisthosomal part by wide U-shaped unsclerotized area. Main body of hysteronotal shield with anterior margin almost straight, anterior angles acute, posterior margin convex and extending to level of setae e2, greatest length 281–294, width at anterior margin 203–228, surface with faint reticulate ornamentation. Opisthosomal part of hysteronotal shield entire (not split medially), posterior-lateral margins of opisthosoma heavily sclerotized, bearing setae e2, f2, h1, h2, h3, and ps1. Lateral bands well developed, with posterior ends fused with opisthosomal shield. Posterior end of opisthosoma rounded with shallow median concavity between setae ps1. Setae c2 piliform, 13–16 long, situated on the anterior angles of hysteronotal shield; cupules ia posterior to them. Setae d2 short piliform, 12–15 long. Setae e1 slightly posterior to level of hysteronotal gland openings gl. Setae e2 lanceolate, length × width 29–31 × 7–9, setae f2 piliform 12–17 long, setae h1 short piliform, 8–13 long, situated on the margins of sclerotized area of opisthosoma. Distances between dorsal setae and gland openings: c2: d2 89–102, d2: e2 202–213, e2: h3 62–66, d2: gl 72–88, h1: h1 80–94, h2: h2 90–97, h3: h3 57–72.

Epimerites I, II without inflated bases. Epimerites I not extending to setae 1a. Epigynum horseshoe-shaped, 64–77 long, 65–79 wide. Setae 4b situated on the middle of epigynum. Setae 4a situated slightly posterior to genital papillae. Copulatory opening on minute cone-like extension, situated terminally, posterior to anal opening. Distances between ventral setae: 4b: g 40–58, 4b: 3a 19–29, g: 4a 55–61, ps2: ps3 27–33, ps2: ps2 71–85.

Femora I, II without ventral crest. Setae cG of genu I short spiculiform, 16–18 long, about half as long as genu I. Legs IV with ambulacra extending to level between bases of setae e2 and f2. Length of tarsi: I 49–56, II 55–59, III 63–69, IV 69–77. Length of solenidia: σ1 I 17–25, σ II 8–11, σ III 11–12, ω1 I 14–17, ω1 II 23–27.

Differential diagnosis. The new species, Coraciacarus cabure sp. nov., resembles C. muellermotzfeldi in having, in males, setae h1 short, less than 1/4 the distance between their bases, and the lobar shield areas not split from the main body of the hysteronotal shield. Both sexes of Coraciacarus cabure sp. nov. can be readily distinguished from that species in having setae cG on genua I short, about half the length of the segment. In C. muellermotzfeldi , setae cG I are about twice as long as the segment.

Etymology. The specific epithet is taken from the Portuguese common name of the type host, “Falcão-caburé”, the Barred Forest-Falcon.

Figures

FIGURE 31. Coraciacarus cabure sp. nov., male: dorsal (A) and ventral (B) views.

FIGURE 32. Coraciacarus cabure sp. nov., female: dorsal (A) and ventral (B) views.

FIGURE 33. Coraciacarus cabure sp. nov.: genu, tibia and tarsus I–IV of male (A–D), tarsus IV of female (E), dorsal opisthosoma of male (F), spermatheca of female (G).