Picobia schmidti, Glowska, Eliza & Milensky, Christopher M., 2014

Glowska, Eliza & Milensky, Christopher M., 2014, New species of the genus Picobia (Cheyletoidea: Syringophilidae) parasitizing tyrannid birds (Passeriformes: Tyrannidae), Zootaxa 3821 (3), pp. 373-383 : 378

Picobia schmidti sp. nov.

( Figs. 9–12 , 19 , 23 )

PHYSOGASTRIC FEMALE (holotype). Total body length 670 (500–670 in 5 paratypes). Gnathosoma . Hypostomal apex tapering. Infracapitulum punctate. Each medial branch of peritremes with 5–6 chambers, each lateral branch with about 5 chambers (borders between chambers poorly visible). Stylophore rounded posteriorly, 115 (115–130) long, punctate in anterior part. Idiosoma . Propodonotal shield represented by 2 narrow apunctate sclerites bearing bases of setae ve and si. Setae ve bases situated anterior to vi. Length ratio of setae vi: ve: si 1–1.3:1:4. Bases of setae c1 and se situated at same transverse level. Hysteronotal shield absent. Setae d1 bases situated closer to setae d2 than e2 bases. Length ratio of setae d1: d2: e2 1.3 –1.5:1.5:1. Pygidial shield strongly sclerotized, double-leaf, covered with pygidial lobes provided with 1 small spike-like outgrowth, punctate. Bases of setae f1 covered by lobes, f2 situated beyond lobes ( Figs. 19 , 23 ). Lengths ratios of setae f1: f2 1:1.8–2.3, h1: h2 1:6, f1: h1 1:1–1.5, f2: h2 1:2.9. Aggenital setae ag1 situated anterior to ag2, ag2 anterior to ag3. Length ratio of ag1: ag2: ag3 1.2–1.8:1:1.7–2.1. Pseudanal setae ps1 and ps2 subequal in length. Setae g filiform, situated on triangular outgrowths of genital lobes. Legs. All coxal fields strongly sclerotized, punctate. Antaxial and paraxial members of claws pair III and IV unequal in size and shape. Setae tc’ and tc” III–IV subequal in length. Lengths of setae: vi 35 (35–45), ve 30 (25–35), si 120 (115), c2 135 (130), se (130–145), c1 135 (160), d2 135 (125–145), d1 120 (145), e2 90 (80–95), f1 35 (30–40), f2 80 (65–70), h1 (30–45), h2 (185–205), ag1 80 (55–75), ag2 45 (45–70), ag3 95 (85–105), g1 (45–60), ps1 (20–25), ps2 (20–25), tc’ (45–55), tc” (45–55), lR’III 20 (25), lR’IV 20 (25), 3c 65 (60), 4b 20, 4c 70 (70).

MALE: Unknown.

Type material. Female holotype and 5 female paratypes (physogastric forms) from quills of body feathers of Lophotriccus pileatus (Tschudi) ( USNM 643873) ( Passeriformes : Tyrannidae ), PERU: Tumbes, El Caucho Biological Station, 8 June 2009, coll. B. K. Schmidt (mites sampled by E. Glowska).

Additional material. Five females (physogastric forms) from quills of body feathers of Hemitriccus margaritaceiventer (Orbigny and Lafresnaye) ( USNM 639393) ( Passeriformes : Tyrannidae ), GUYANA: Cuyuni- Mazaruni, Paruima, ca. 19 km N, at Mt. Holitipu, 19 February 2007, coll. B. K. Schmidt (mites sampled by E. Glowska).

Material deposition. Female holotype, 2 female paratypes and 3 females from L. pileatus are deposited in the USNM, 2 female paratypes and 2 females from H. margaritaceiventer - in the AMU.

Etymology. This species is named in honor of the collector of the host specimens, Brian K. Schmidt.

Differential diagnosis. Picobia schmidti sp. nov. is most similar to P. myiopagi sp. nov. In females of both species the stylophore is rounded posteriorly and punctated in the anterior part, the propodonotal shield is represented by two punctate narrow sclerites bearing bases of setae ve and si, setae ve bases are situated anterior to vi, the pygidial shield is double-leaf, covered with lobes. Females of P. schmidti are distinguishable from P. myiopagi by the distal part of the pygidial lobes provided with one tiny, sharp spine ( Figs. 19 , 23 ) and by the length of setae vi 30–45, si 115–120, c2 130–135, se 130–145 and ag3 85–105. In females of P. myiopagi the pygidial lobes are provided with one large strongly sclerotized spike-shaped outgrowth ( Figs. 20 , 24 ) and the lengths of setae are vi 15–25, si 145–180, c2 160–180, se 160–185 and ag3 120–150.

Figures

FIGURES 9 – 12. Picobia schmidti sp. nov., physogastric female: 9 — dorsal view, 10 — ventral view, 11 — hypostomal apex, 12 — peritremes. Scale bars: 9, 10 = 100 µm; 11, 12 = 20 µm.

FIGURES 17 – 20. Pygidial shields of Picobia spp., females: 17 — Picobia sayornis, 18 — P. ochoi sp. nov., 19 — P. schmidti sp. nov., 20 — P. myiopagi sp. nov. Scale bars: 17 — 20 = 100 µm.

FIGURES 21 – 24. Pygidial shields of Picobia spp., females: 21 — Picobia sayornis, 22 — P. ochoi sp. nov., 23 — P. schmidti sp. nov., 24 — P. myiopagi sp. nov.