Trouessartia basileuteri, Hernandes, Fabio Akashi, 2014

Hernandes, Fabio Akashi, 2014, Five new species of the feather mite genus Trouessartia Canestrini from South America (Acari: Trouessartiidae), Zootaxa 3856 (1) : -

Trouessartia basileuteri sp. nov.

( Figs. 7–9 )

Type-host: Basileuterus culicivorus (Deppe, 1830) ( Passeriformes , Parulidae ), Golden-crowned warbler.

Type-locality: Guaratuba, Paraná, Brazil.

Material examined. Male holotype, 4 male and 8 female paratypes ex Basileuterus culicivorus , BRAZIL: Guaratuba, Paraná, 25º45’S, 48º43’W, 18 March 2013, coll. C.O.A. Gussoni. Type specimen deposition: holotype and paratypes at DZUnesp-RC.

Etymology. The specific epithet is taken from the generic name of the host and is a noun in the genitive case.

Description. Male (holotype, range for 4 paratypes in parentheses). Length of idiosoma from anterior end to bases of setae h3 430 (411–442), greatest width of idiosoma at level of humeral shields 202 (201–210). Length of hysterosoma from sejugal furrow to bases of setae h3 294 (278–300). Prodorsal shield: length along midline 131 (129–137), greatest width of posterior part 151 (142–153), anterior part at level of trochanters II not narrowed, antero-lateral extensions almost extending to bases of epimerites Ia between legs I, II, lateral margins not fused with scapular shields, posterior margin straight, surface with faint network pattern ( Fig. 7 A). Vertical setae ve represented only by alveoli. Internal scapular setae si thin needle-like, 29 (28–30) long, separated by 60 (58–65); external scapular setae se 166 (158–165) long, separated by 98 (99–104). Humeral shield with setae c2 needle-like, 50 (45–46) long. Setae c3 narrowly lanceolate, acute apically, 22 (19–25) long. Prohysteronotal shield and lobar shield connected only laterally. Prohysteronotal shield: length 184 (173–181), widest part near anterior margin 148 (144–156), lateral margins incised at level of trochanters III, dorsal hysterosomal apertures (DHA) absent, central area smooth. Dorsal setae d1, d2 present, minute. Length of lobar shield excluding lamellae 99 (94–105). Apical parts of opisthosomal lobes approximate, separated by narrow parallel-sided terminal cleft, length of cleft from anterior end to apices of lamellae 63 (64–69), width in anterior part 9 (7–9). Lamellae margins smooth, slightly attenuate apically, length from bases of setae h3 to lamellar apices 48 (42–50). Seta h2 244 (215–259) long, seta h3 134 (112–163) long. Distance between dorsal setae: c2: d2 83 (80–89), d2: e2 103 (93–99), e2: h2 80 (72–82), h2: h3 29 (25–29), h2: h2 47 (45–50), h3: h3 38 (32–39), d1: d2 39 (36–42), e1: e2 43 (42–47).

Epimerites I free. Rudimentary sclerites rEpIIa present, roughly rounded. Genital apparatus situated at level of trochanters III, length excluding basal sclerite 53 (47–50), greatest width 24 (21–22) ( Figs 7 B). Epiandrum present, small, connected to anterior part of genital apparatus. Setae g long and thickened. Postgenital plaque present. Adanal apodemes heavily sclerotized, without rounded apophyses. Translobar apodeme present. Adanal shields small, triangular, bearing setae ps3. Anal suckers 17 (16–18) in diameter, distance between centers of discs 25 (24–26). Epimerites IVa wide and short, anterior ends not reaching level of setae 4a. Setae 4b situated slightly anterior to level of setae 3a, setae g and 4a situated approximately at same transverse level. Distance between ventral setae 4b: 3a 34 (31–39), 4b: g 82 (79–84), g: ps3 61 (55–62), ps3: ps2 53 (49–52).

Legs IV extending by ambulacral disc slightly beyond level of setae h3. Setae sR of trochanters III narrowly lanceolate, acute apically, 21 (18–20) long. Modified setae d of tarsus IV barrel-shaped, with discoid cap, situated in dorsal half of segment; modified setae e hemispheroid, without cap, situated apically ( Fig. 9 D). Length of solenidia: σ1 of genu I 59 (52–56), σ of genu II 15 (13–16), σ of genu III 22 (23–25), ϕ of tibia I 74 (72–77), ϕ of tibia II 83 (79–85), ϕ of tibia III 62 (56–62), ϕ of tibia IV 41 (42–43), ω1 of tarsus I 23 (23–25), ω3 of tarsus I 30 (30–33), ω1 of tarsus II 24 (24–27).

Female (range for 5 paratypes). Length of idiosoma from anterior end to apices of lamellar lobar processes 498–536, greatest width 206–223. Length of hysterosoma from sejugal furrow to apices of lamellar lobar processes 356–385. Prodorsal shield: shaped as in male, 133–147 in length, 155–164 in width, surface with faint network pattern ( Fig. 8 A). Vertical setae ve represented only by alveoli. Setae si thin needle-like, 26–31 long, separated by 61–68; setae se 120–170 long, separated by 84–112. Humeral shields with setae c2 needle-like, 44–56 long. Setae c3 narrowly lanceolate, with acute apex, 23–26 in length. Hysteronotal shield: length from anterior margin to bases of setae h3 295–314, width at largest part near anterior margin 155–165, lateral margins incised at level of trochanters III, DHA absent, anterior and posterior parts with small and ovate lacunae. Dorsal setae d1, d2 present. Setae h1 thick, lanceolate, 36–42 long, situated antero-mesal to bases of setae h2, 21–25 from each lateral margin of hysteronotal shield. Width of opisthosoma at level of setae h2 104–113. Setae ps1 positioned dorsally on opisthosomal lobes, closer to bases of h3 than to h2, equidistant from outer and inner margins of lobe. Distance from bases of setae h3 to membranous apices of lobes 50–58. Setae f2 absent. Supranal concavity open posteriorly into terminal cleft. Length of terminal cleft together with supranal concavity 154–163, width of cleft at level of setae h3 37–47. Interlobar membrane occupying anterior 1/6 of terminal cleft. External copulatory tube present, protruding from free margin of interlobar membrane, attenuated to apex, 27–35 long. Spermatheca as in Fig. 9 I. Distance between dorsal setae: c2: d2 85–99, d2: e 2 90 –94, e2: h2 59–67, h2: h3 68–75, h2: h2 89–94, h3: h3 66–75, d1: d2 41–46, e1: e2 41 –46, h1: h 2 25–30, h1: h1 49–56, ps1: h3 14:17.

Epimerites I free. Epigynum 49–58 in length, 89–97 in width ( Fig. 8 B). Epimerites IVa present, thin and long. Anal opening with pair of irregular sclerites situated at level of its anterior end. Setae sR of trochanters III narrowly lanceolate, acute apically, 17–20 long. Legs IV extending by ambulacral disc to level of setae ps1. Length of solenidia: σ1 of genu I 52 –57, σ of genu II 15–17, σ of genu III 25–28, ϕ of tibia I 66 –77, ϕ of tibia II 76 –81, ϕ of tibia III 57 –67, ϕ of tibia IV 20–32, ω1 of tarsus I 22–24, ω3 of tarsus I 28–32, ω1 of tarsus II 23–27.

Differential diagnosis. Trouessartia basileuteri sp. nov. resembles T. capensis Berla by having, in males, setae h3 as long as h2, lamella margins smooth, dorsal hysteronotal apertures (DHA) absent, and in females, setae h1 dagger-like, and external copulatory tube attenuate. Trouessartia basileuteri sp. nov. differs from the latter species essentially by characters in females: setae ps1 inserted closer to h3 than to h2, whereas in T. capensis setae ps1 are inserted midway from h3 and h2.

Figures

FIGURE 7. Trouessartia basileuteri sp. nov., male. A—dorsal view; B—ventral view.

FIGURE 8. Trouessartia basileuteri sp. nov., female. A—dorsal view; B—ventral view.

FIGURE 9. Trouessartia basileuteri sp. nov.: tarsi I-IV of male (A – D) and female (E – H); I—spermatheca of female.