Trouessartia latiducta, 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 latiducta sp. nov.

( Figs. 1–3 )

Type-host: Phylloscartes kronei Willis & Oniki, 1992 ( Passeriformes , Tyrannidae ), Restinga Tyrannulet.

Type-locality: Guaratuba, Paraná, Brazil.

Material examined. Male holotype, 12 male and 22 female paratypes (bird code K-12) ex Phylloscartes kronei , BRAZIL: Guaratuba, Paraná, 25º45’S, 48º43’W, 13 January 2012, coll. C.O.A. Gussoni; paratypes from same host, locality and collector, from different bird specimens, 12 January 2012: 4 males and 2 females (K-2), 4 males and 9 females (K-3), 1 male and 1 female (K-19), 1 male (K-10). Type specimen deposition: holotype and most paratypes at DZUnesp-RC; 2 male and 2 female paratypes at each of DZSJRP, OSAL, UMMZ, ZISP.

Etymology. The specific epithet refers to the wide and large external copulatory tube on females.

Description. Male (holotype, range for 5 paratypes in parentheses). Length of idiosoma from anterior end to bases of setae h3 480 (466–486), greatest width of idiosoma at level of humeral shields 224 (227–241). Length of hysterosoma from sejugal furrow to bases of setae h3 330 (314–329). Prodorsal shield: length along midline 145 (142–154), greatest width of posterior part 162 (156–171), anterior part at level of trochanters II not narrowed, anterolateral extensions almost extending to bases of epimerites Ia between legs I and II, lateral margins not fused with scapular shields, posterior margin almost straight, surface with faint network pattern ( Fig. 1 A). Vertical setae ve represented only by alveoli. Internal scapular setae si thin needle-like, 40 (34–40) long, separated by 66 (64–69); external scapular setae se 170 (144–174) long, separated by 113 (106–118). Humeral shield with setae c2 needlelike, 51 (56–69) long. Setae c3 narrowly lanceolate, acute apically, 33 (31–34) long. Prohysteronotal and lobar shields mainly connected laterally by narrow bridges. Prohysteronotal shield: length 198 (197–212), width at widest part near the anterior margin 169 (161–176), lateral margins with shallow incisions at level of trochanters III, dorsal hysterosomal apertures (DHA) absent, central area with a faint network pattern. Dorsal setae d1, d2 present, minute. Length of lobar shield excluding lamellae 118 (98–119). Apical parts of opisthosomal lobes approximate, separated by narrow parallel-sided terminal cleft, length of cleft from anterior end to apices of lamellae 81 (71–83), width in anterior part 15 (18–20). Lamellae semi-ovate, slightly attenuate apically, margins smooth, length from bases of setae h3 to lamellar apices 43 (43–52). Seta h2 267 (293–335) long, seta h3 185 (191–225) long. Distance between dorsal setae: c2: d2 95 (89–97), d2: e2 94 (96–118), e2: h2 111 (80–113), h2: h3 31 (28–32), h2: h2 68 (62–70), h3: h3 55 (53–60), d1: d2 44 (39–44), e1: e2 42 (47–50).

Epimerites I free. Rudimentary sclerites rEpIIa small, circular. Genital apparatus situated between levels of trochanters III, IV, length excluding basal sclerite 68 (65–69), greatest width 31 (29–35) ( Fig. 1 B). Epiandrum present. Setae g thin, filiform. Postgenital plaque absent. Adanal apodemes heavily sclerotized, without rounded apophyses. Translobar apodeme present. Adanal shields absent, setae ps3 inserted on soft tegument. Anal suckers 14 (12–15) in diameter, distance between centers of discs 42 (41–44). Epimerites IVa wide and long, anterior ends reaching level of setae 4a. Setae 4b situated anterior to level of setae 3a, setae g and 4a situated approximately at same transverse level. Distance between ventral setae 4b: 3a 45 (42–47), 4b: g 103 (89–105), g: ps3 60 (54–72), ps3: ps2 59 (60–63).

Legs IV extending by ambulacral disc to level of setae h3. Setae sR of trochanters III short, narrowly lanceolate, acute apically, 17 (17–20) long. Modified setae d of tarsus IV barrel-shaped, with discoid cap, situated at midlevel of segment; modified setae e hemispheroid, without cap, situated apically ( Fig. 3 D). Length of solenidia: σ1 of genu I 45 (48–55), σ of genu II 16 (15–21), σ of genu III 25 (27–36), ϕ of tibia I 80 (77–82), ϕ of tibia II 88 (84–94), ϕ of tibia III 71 (68–77), ϕ of tibia IV 39 (41–47), ω1 of tarsus I 21 (20–26), ω3 of tarsus I 29 (29–34), ω1 of tarsus II 22 (23–26).

Female (range for 5 paratypes). Length of idiosoma from anterior end to apices of lamellar lobar processes 525–579, greatest width 220–248. Length of hysterosoma from sejugal furrow to apices of lamellar lobar processes 372–408. Prodorsal shield: shaped as in male, 145–157 in length, 156–171 in width, surface with faint network pattern ( Fig. 2 A). Vertical setae ve represented only by alveoli. Setae si thin needle-like, 29–35 long, separated by 67–74; setae se 126–171 long, separated by 106–117. Humeral shields with setae c2 needle-like, 54–59 long. Setae c3 narrowly lanceolate, acute apically, 27–32 in length. Hysteronotal shield: length from anterior margin to bases of setae h3 319–351, width at largest part near anterior margin 156–174, lateral margins with incisions at level of trochanters III, DHA absent, anterior part with faint circular and oval ornamentation, posterior part with more defined circular and ovate lacunae. Dorsal setae d1, d2 present. Setae h1 lanceolate, 26–32 long, situated anteromesal to bases of setae h2, 22–28 from each lateral margin of hysteronotal shield. Width of opisthosoma at level of setae h2 101–113. 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 42–50. Setae f2 absent. Supranal concavity open posteriorly into terminal cleft. Length of terminal cleft together with supranal concavity 166–180, width of cleft at level of setae h3 39–48. Interlobar membrane occupying anterior 1/4 of terminal cleft, distance from free margin of membrane to membranous lobar apices 110–115. External copulatory tube present, wide cylindrical, with wide circular opening, 31–46 long, 13–19 wide. Spermatheca as in Fig. 3 I. Distance between dorsal setae: c2: d2 91–100, d2: e 2 93 –103, e2: h2 73–82, h2: h3 71–83, h2: h2 83–92, h3: h3 68–76, d1: d2 37–46, e1: e2 43 –55, h1: h 2 17–29, h1: h1 49–55, ps1: h3 18:25.

Epimerites I free. Epigynum 53–61 in length, 97–108 in width ( Fig. 2 B). Epimerites IVa present, wide. Anal opening with pair of small sclerites situated at level of its anterior end. Setae sR of trochanters III narrowly lanceolate, acute apically, 19–22 long. Legs IV extending by ambulacral disc to level of setae ps1. Length of solenidia: σ1 of genu I 44 –58, σ of genu II 15–24, σ of genu III 24–35, ϕ of tibia I 74 –82, ϕ of tibia II 83 –94, ϕ of tibia III 60 –76, ϕ of tibia IV 37 –43, ω1 of tarsus I 19–23, ω3 of tarsus I 27–35, ω1 of tarsus II 20–27.

Differential diagnosis. Trouessartia latiducta sp. nov. resembles T. sicaliae sp. nov. by having, in males, setae h3 about as long as h2, lamella margins smooth, dorsal hysteronotal apertures (DHA) absent, and in females, setae h1 dagger-like. However, it clearly differs from T. sicaliae by having opisthosomal lobes in males slightly more separated (the terminal cleft length is about 4.5 times longer than wide at the level of setae h3), and setae g filiform and transversely aligned with setae 4a; in females, the external copulatory tube is cylindrical, short and wide (31–46 long, 13–19 wide) much wider and blunt, and setae ps1 are inserted closer to h3 than to h2. In T. sicaliae sp. nov., males have opisthosomal lobes narrower (the terminal cleft length is about 8.5 times longer than wide at level of h3), setae g are thickened and inserted clearly anterior to the level of setae 4a; in females the external copulatory tube is elongated and attenuate apically (51–60 long) and setae ps1 are inserted mid-way between setae h3 and h2.

Figures

FIGURE 1. Trouessartia latiducta sp. nov., male. A—dorsal view; B—ventral view.

FIGURE 2. Trouessartia latiducta sp. nov., female. A—dorsal view; B—ventral view.

FIGURE 3. Trouessartia latiducta sp. nov.: tarsi I-IV of male (A – D) and female (E – H); I—spermatheca of female.