Coraciacarus peixefrito, 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 : 41-45

Coraciacarus peixefrito sp. nov.

( Figs. 28–30 )

Type material: Male holotype (#5004), 9 male and 10 female paratypes (#5005–5021) ex Dromococcyx phasianellus (Spix, 1824) ( Cuculiformes : Cuculidae ), museum skin from MHNCI, BRAZIL, Paraná State, Hydroelectric Plant “Fundão”, Pinhão, 6 May 2011, coll. Leonardo R. Deconto, skin MHNCI-6517.

Depositories: Holotype and paratypes at UFSC, paratypes also at MHNCI .

MALE ( Figs. 28 , 30 A–D, F). (Holotype, range for five paratypes in parentheses). Gnathosoma roughly trap- ezoidal, length including palps 64 (56–64), greatest width at base 69 (61–67). Idiosoma length from anterior end to bases of setae h3 on lobar apices 413 (368–396), greatest width at level of humeral setae 255 (205–252); length of hysterosoma 293 (276–293). 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 towards setae se, posterior margin slightly sinuous with median concavity, greatest length 91 (97–94), width at posterior margin 139 (133–147). Setae vi thin piliform, 34 (24–34) long, extending to basal parts of palps. Setae si short piliform, 17 (16–19) long. Distance between bases of scapular setae: se: se 71 (65–71), si: si 34 (30–38). Subhumeral setae c3 lanceolate, length × width 19 (19–22) × 4 (4–5). Hysteronotal shield: greatest length from anterior margins to bases of setae h3 270 (265–283), length along midline 182 (175–190), width at anterior margin 205 (185–205), anterior margin sinuous, surface with irregular ornamentation mostly on posterior third. Lateral bands distinct. Lobar areas of hysteronotal shield separated from main body of hysteronotal shield. Supranal concavity not developed. Setae c2 thin piliform, 22 (15–22) long, situated in anterior angles of hysteronotal shield, cupules ia immediately posterior to their bases. Setae e1 situated anterior to level of hysteronotal gland openings gl. Terminal cleft roughly triangular, length from anterior end to lobar apices (bases of setae h3) 78 (74–86), width at level of setae h1 80 (76–82). Inner margins of opisthosomal lobes heavily sclerotized, with small semicircular incision anterior to bases of setae h1, posterior ends of opisthosomal lobes with small rounded membranous extensions. Setae e2 lanceolate, 27 (25–29) long, with apices not reaching the level of setae h2; setae f2 narrowly lanceolate, 27 (18–27) long, situated slightly posterior to the level of setae h2, setae h1 lanceolate, 17 (17–22) long, 5 (3–5) wide, situated at the same level of setae h2. Distances between bases of dorsal setae and gland openings: c2: d2 80 (76–84), d2: e2 135 (130–144), e2: h3 60 (56–63), d2: gl 68 (59–68), h3: h3 112 (105–112), h2: h2 117 (111–115), d1: d2 15 (14–20), e1: e2 103 (90–96).

Epimerites I, II without inflated bases. Epimerites I with tips simple, curved apically, not extending to bases of coxal setae 1a. Epimerites II slightly curved. Genital apparatus posterior to level of trochanters IV, genital arch 35 (28–36) × 31 (27–32), 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 19 (12–20), g: 4a 77 (73–81), 4a: ps3 35 (34–39), ps3: ps3 99 (86–103), 4a: 4a 10 (10–13). Adanal suckers 22 (21–23) in diameter, corolla with 15–18 rounded denticles.

Femora I, II without ventral crest. Seta cG of genu I spiculiform, 65 (59–65) long, almost equal to combined length of genu and tibia I. Solenidion σ 1 of genu I 15 (13–15) long, much longer than solenidion σ 2. Solenidion σ of genu III situated in middle part of this segment. Solenidion φ of tibia IV shorter than corresponding tarsus. Tarsus IV with seta d short setiform, seta e minute spine-like. Legs IV with ambulacrum extending to level of lobar apices. Length of tarsi: I 44 (41–44), II 48 (47–50), III 51 (48–53), IV 50 (49–54). Ambulacral disc of tarsus I roughly circular and subequal to those of tarsi II–IV. Length of solenidia: σ1 I 15 (13–15), σ II 11 (10–13), σ III 13 (11–14), ω1 I 11 (10–11), ω1 II 20 (18–21).

FEMALE ( Figs. 29 , 30E, G ) (range for five paratypes). Gnathosoma, length × width, 72–85 × 77–90. Idiosoma, length × width, 435–502 × 254–286, length of hysterosoma 319–367. Prodorsal shield shaped as in male, 108–118 × 167–178. Setae vi thin piliform, 30–45 long, reaching basal parts of palps. Setae si piliform, 26–37 long. Distance between bases of scapular setae: se: se 74–84, si: si 33–41. Subhumeral setae c3 lanceolate, length × width 22–25 × 6–8. Hysteronotal shield: almost completely split into main body and a pair of opisthosomal pieces, unsclerotized opisthosomal area splitting this shield large U-shaped and opened posteriorly. Main body of hysteronotal shield: anterior margin slightly concave, anterior angles acute, posterior end with median extension almost reaching setae h1, greatest length 272–302, width at anterior margin 210–229, surface with faint reticulate ornamentation mostly transverse on the anterior 2/3, and longitudinal in the posterior third. Lateral bands well developed, their posterior ends fused with opisthosomal pieces. Postero-lateral margins of opisthosoma heavily sclerotized, bearing setae e2, f2, h2, h3, and ps1. Posterior end of opisthosoma with a pair of short and rounded opisthosomal lobes separated by a shallow terminal cleft. Setae c2 spiculiform, 17–22 long, situated off hysteronotal shield; cupules ia posterior to them. Setae d2 short piliform, 14–17 long. Setae e1 approximately at level of hysteronotal gland openings gl or slightly posterior to them. Setae e2 lanceolate, length × width 27–32 × 5–7, setae f2 piliform 19–21 long, setae h1 short stout spiculiform, 8–12 long, situated on desclerotized area of opisthosoma. Distances between dorsal setae and gland openings: c2: d2 77–101, d2: e2 160–175, e2: h3 62–78, d2: gl 63–85, h1: h1 40–51, h2: h2 61–99, h3: h3 62–88.

Epimerites I, II without inflated bases. Epimerites I not extending to setae 1a. Epigynum horseshoe-shaped, 58–69 long, 74–91 wide. Setae 4b situated on epigynum. Setae 4a situated posterior to genital papillae. Copulatory opening dorso-terminal on minute conical extension, posterior to anal opening. Distances between ventral setae: 4b: g 45–50, 4b: 3a 21–36, g: 4a 35–51, ps2: ps3 30–41, ps2: ps2 73–94.

Femora I, II without ventral crest. Setae cG of genu I long spiculiform, 71–87 long, slightly longer than combined length of genu and tibia I. Legs IV with distal part of ambulacra extending to level of posterior end of opisthosoma. Length of tarsi: I 47–50, II 55–58, III 60–67, IV 63–74. Length of solenidia: σ1 I 17–119, σ II 13–16, σ III 15–21, ω1 I 12–13, ω1 II 21–27.

Differential diagnosis. The new species Coraciacarus peixefrito sp. nov. resembles C. muellermotzfeldi in having in both sexes strong, stick-like setae cG on genua I, approximately as long as genu + tibia. Coraciacarus peixefrito can be distinguished from the latter species based on the following characteristics: in males, setae g are situated anterior to the genital papillae, lobar shields are distinctly separated from the main hysteronotal shield, solenidion σ is inserted at the midlength of genua III; in females, setae h1 are spiculiform, setae si are about as long as vi, the posterior margin of the main body of the hysteronotal shield has a median irregular extension almost extending to setae h1. In males of C. muellermotzfeldi , setae g are situated at the level of the posterior pair of genital papillae, lobar shields are not separated from the main hysteronotal shield, and solenidion σ is inserted basally on genua III; in females, setae h1 are thin, piliform, setae si are about 6–8 times shorter than vi, and the posterior margin of the main body of the hysteronotal shield is sinuous, without any noticeable extension towards setae h1.

Etymology. The specific name refers to the Portuguese common name of the type host, “Peixe-frito-verdadeiro”, the Pheasant Cuckoo.

Figures

FIGURE 28. Coraciacarus peixefrito sp. nov., male: dorsal (A) and ventral (B) views.

FIGURE 29. Coraciacarus peixefrito sp. nov., female: dorsal (A) and ventral (B) views.

FIGURE 30. Coraciacarus peixefrito 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).