Picobia magellani, Skoracki & Sikora & Spicer, 2016

Skoracki, Maciej, Sikora, Bozena & Spicer, Greg S., 2016, A review of the subfamily Picobiinae Johnston and Kethley, 1973 (Acariformes: Prostigmata: Syringophilidae), Zootaxa 4113 (1), pp. 1-95 : 43

Picobia magellani sp. nov.

( Figs. 30 and 31 )

Description. FEMALE NPF (holotype). Gnathosoma . Hypostomal apex tapering. Infracapitulum and stylophore punctate. Movable cheliceral digit edentate on proximal end. Each medial branch of peritremes with 5–7 chambers, each lateral branch with ill-visible chambers. Idiosoma . Propodonotal shield absent. Setae vi situated distinctly posterior to level of setae ve. Setae se and c1 situated at same transverse level. Setae vi, ve and si lightly beaded. Pygidial shield well developed, with vertical furrow, double-leaf, apunctate. Setae ag2 situated posterolateral to ag1. Large, punctate genital plate bearing setae ag1–3. Setae g1 filiform, situated on sharp-ended genital lobes. All coxal fields punctate. Legs. Paraxial claws of legs III and IV thiner than antaxial claws III–IV. Solenidia σ on genua I setiform. Mesurements. Total body length 495. Length of stylophore 125. Lengths of setae: vi 115, ve 115, si 170, se 180, c1 170, c2 180, d1 170, d2 170, e2 100, f1 55, f2 60, h1 55, h2 265, ag1 60, ag2 35, ag3 80, g1 50, ps1 25, ps2 30, tc’III–IV and tc”III–IV 55. Length ratios of setae: vi: ve: si 1:1:1.5, d2: e2 1.7:1, f1: f2 1:1, f1: h1 1:1, f2: h2 1:4.4, h1: h2 1:4.8, ag1:ag2:ag3 1.7:1:2.3, g1: ps2: ps1 2:1.2:1, tc’III–IV: tc”III–IV 1:1.

FEMALE PF (7 paratypes). Total body length 745–795.

MALE. Unknown.

Type material. Female holotype ( NPF) and 7 female ( PF) paratypes from Scytalopus magellanicus (Gmelin) ( Passeriformes : Rhinocryptidae ), COLOMBIA: Bogota, no other data .

Type deposition. All type material is deposited in the AMU, except 1 female (PF) paratype in ZSM and 1 female (PF) paratype in ZISP .

Differential diagnosis. Picobia magellani sp. nov. is morphologically most simillar to P. schmidti Glowska and Milensky, 2014 . In females of both species, the hypostomal apex is tapering; the lateral branches of the peritremes are with ill-visible chambers; setae vi are situated distinctly posterior to the level of setae ve; the pygidial shield is double-leaf, each with 1 spin-like outhgrowth; setae ag2 are situated posterolateral to ag1. This new species differs from P. schmidti as follow: in females of P. m a g e l l a n i, the propodonotal shield is absent; the length ratios of setae ve: si and f1: f2 are 1:1.5 and 1:1. In females of P. schmidti , the lateral propodonotal shields are present, each bearing bases of setae ve and si; the length ratios of setae ve: si and f1: f2 are 1:4 and 1:1.8–2.3.

Etymology. The name of this species is derived from the specific name of the host— Scytalopus magellanicus , and is a noun in apposition.

Figures

FIGURE 30. Picobia magellani sp. nov., female. A, dorsal view; B, ventral view.

FIGURE 31. Picobia magellani sp. nov., female. A, hypostomal apex; B, propodonotal seta si; C, genito-anal region; D, tarsus III in ventral view; E, proximal end of movable cheliceral digit; F, solenidia of leg I.