Picobia sayornis, Glowska, Eliza, 2014

Glowska, Eliza, 2014, New quill mites (Cheyletoidea: Syringophilidae) parasitizing tyrannid birds (Passeriformes: Tyrannidae) in Peru, Zootaxa 3814 (1), pp. 139-145 : 140

Picobia sayornis sp. nov.

( Figs. 1–5 )

FEMALE. Total body length 680. Gnathosoma . Infracapitulum punctate. Hypostomal apex with blunt-ended, small protuberances. Each median branch of peritremes with 7 chambers, in lateral branches borders between chambers invisible. Podomers of palp densely punctate. Idiosoma . Propodonotal shield represented by 2 punctate, saber-like lateral sclerites bearing bases of setae ve and si. Bases of setae ve situated anterior to vi bases. Length ratio of setae vi:ve:si 1:1.3:4.7–5.9. Hysteronotal shield absent. Bases of setae d1 situated equidistant to d2 and e2. Pygidial shield double-leaf, bearing bases of setae f1 and f2, densely punctate. Length ratio of f1: f2 about 1:1.3. Agenital setae ag1 anterior to ag2, ag2 anterior to ag3. Bases of setae ag2 situated on genital lobes. Length ratio of ag1: ag2: ag3 1.7:1:2.4. Genital setae g filiform, situated on triangular outgrowth of genital lobes. Pseudanal setae ps1 and ps2 subequal in length. Setae g 1.8–2 times longer than ps1, 2. Legs. Coxal fields of legs I–II punctuate, III–IV apunctate. Setae 3c 3 times longer than 3b. Setae tc’ and tc” of tarsi III–IV equal in length. Antaxial and paraxial members of claw pairs III–IV unequal in size and shape. Lengths of setae: vi 30 (35), ve 40 (45), si 190 (165), c2 180 (165), se 185 (190), c1 (205), d2 180 (190), d1 185 (195), e2 135 (130), f1 65, f2 105, h1 55 (45), h2 (245), ag1 100 (100), ag2 60 (65), ag3 155 (145), g1 70 (70), ps1 30 (40), ps2 35 (40), tc’ 65, tc” 65, l’R’III 30 (20), l’R’IV 20 (25), 3b 30 (30), 3c 90 (95), 4b 30, 4c 105.

MALE. Unknown.

Etymology. The specific epithet derives from the generic name of the host.

Type material. Female holotype and 3 female paratypes from quill of body feathers of the black phoebe Sayornis nigricans (Swainson) ( Passeriformes : Tyrannidae ) ( USNM 643863) PERU: Tumbes, El Caucho Biological Station, 6 June 2009, coll. B.K. Schmidt, mites removed by E. Glowska.

Type deposition. Holotype female and 1 female paratype are deposited in the USNM, 2 female paratypes in the AMU.

Differential diagnosis. This new species is most similar to Picobia galerida Skoracki described from Galerida cristata (L.) ( Passeriformes : Alaudidae ) from Poland ( Skoracki 2011). In females of both species, the hypostomal apex bears the blunt-ended protuberances, bases of setae ve are situated anterior to vi, the propodonotal shield is represented by two punctate sabre-like sclerites, the hysteronotal shield is absent, setae f1 and f2 are similar in the length, and bases of setae ag 1 set anterior to ag2. This new species differs from P. galerida by the size of propodonotal shield, bearing bases of setae ve and si, the double-leaf pygidial shield, the presence of heavily overgrown genital lobes and setae h2 about five times longer than h1. In females of P. galerida , the propodonotal shield bears bases of setae ve, si and se, the pygidial shield is divided, the genital lobes are small, setae h1 and h2 are equal in the length (295).

Figures

FIGURES 1 – 5. Picobia sayornis sp. nov., female: 1 — dorsal view, 2 — ventral view, 3 — hypostomal apex, 4 — peritremes, 5 — propodonotal setae vi. Scale bars: 1, 2 = 100 µm; 3 – 5 = 50 µm.