Picobia ochoi, 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 : 374-377

Picobia ochoi sp. nov.

( Figs. 1–8 , 18 , 22 )

NON-PHYSOGASTRIC FEMALE (holotype, Figs. 1–4 , 18 ). Total body length 570 (605–630 in 3 paratypes). Gnathosoma . Hypostomal apex tapering ( Fig. 3 ). Infracapitulum punctate. Each medial branch of peritremes with 6–7 chambers, each lateral branch with about 5 chambers (borders between chambers poorly visible) ( Fig. 4 ). Stylophore rounded posteriorly, 170 (165–170) long, punctate in anterior part. Idiosoma . Propodonotal shield represented by 2 narrow punctate sclerites bearing bases of setae ve and si. Setae ve bases situated anterior to bases of setae vi. Length ratio of setae vi: ve: si 1:1–1.2:6.8–10. 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 1:1:1.2–1.4. Pygidial shield strongly sclerotized, double-leaf, covered with pygidial lobes ended flounce-like outgrowths, densely punctate. Bases of setae f1 covered by lobes, f2 situated beyond lobes ( Figs. 18 , 22 ). Lengths ratios of setae f1: f2 1:1–1.2, h1: h2 1:4.8–6.5, f1: h1 1.8:1, f2: h2 1:2.2–2.4. Aggenital setae ag1 situated anterior to ag2, ag2 anterior to ag3. Length ratio of ag1: ag2: ag3 1.6–1.9:1:1.4–1.8. Pseudanal setae ps1: ps2 subequal in length. Setae g filiform, situated on triangular outgrowths of genital lobes. Legs. All coxal fields strongly sclerotized, punctate. Setae 3c 7.2 times longer than 3b. 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 20 (20–25), ve 20 (20–30), si 180 (170–195), c2 (215–220), se 220 (230–250), c1 220 (230), d2 (205–235), d1 205 (235), e2 170 (170), f1 90 (95), f2 110 (95–115), h1 50 (40), h2 240 (260–280), ag1 160 (170), ag2 85 (70–105), ag3 155 (145–175), g1 70 (75), ps1 30, ps2 30, tc’ 70, tc” 70, lR’III 30 (30), lR’IV 35 (30), 3b 20, 3c 145, 4b 45, 4c 170. PHYSOGASTRIC FEMALE ( Figs. 5–8 , 1 paratype). Body worm-shaped, 980 long, other characters of body and legs as in non-physogastric form.

MALE: Unknown.

Type material. Female holotype and 3 female paratypes (2 non-physogastric and 1 physogastric) from quills of body feathers of Tolmomyias sulphurescens (Spix) ( USNM 639149) ( Passeriformes : Tyrannidae ), GUYANA: Cuyuni-Mazaruni, Paruima, ca. 19 km N, at Mt. Holitipu, 18 February 2007, coll. C.M. Milensky (mites sampled by E. Glowska).

Material deposition. Holotype female and 1 female paratype are deposited in the USNM, 2 female paratypes in the Adam Mickiewicz University, Poznan, Poland (AMU).

Etymology. This new species is named in honor of the prominent acarologist, Dr. Ronald Ochoa.

Differential diagnosis. Picobia ochoi sp. nov. is most similar to P. s ay o r n i s Glowska, 2014 described from the Black Phoebe Sayornis nigricans (Swainson) ( Passeriformes : Tyrannidae ) from Peru (Glowska 2014). In females of both species, each medial branch of the peritremes has 6–7 chambers and the borders between chambers of the lateral branches are poorly visible, the stylophore is rounded posteriorly, and punctate in 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, and the pygidial shield is double-leaf covered with lobes. Females of P. ochoi differ from P. s a y or ni s by the distal edge of the pygidial lobes flounce-like ( Figs. 18 , 22 ) and by the lengths of setae vi 20–25, ve 20–30, c2 215–220, se 220–250, e2 170, f1 90–95, ag1 160–170, 3c 145, 4c 170. Females of P. sayor ni s have the pygidial lobes bearing 2-4 small, blunt-ended protuberances ( Figs. 17 , 21 ) and the setal lengths: vi 30–35, ve 40–45, c2 165–180, se 185–190, e2 130–135, f1 65, ag1 100, 3c 90–95, 4c 105.

TABLE. 1. Quill mites species (Cheyletoidea: Syringophilidae ) parasitizing tyrannid birds ( Passeriformes : Tyrannidae ).

Mite species Host species Distribution References

Picobia myiopagi sp. nov. Myiopagis gaimardii (Orbigny) Guyana present paper M. subplacens (Sclater) Peru p. p.

Elaenia ruficeps Pelzeln Guyana p. p.

ochoi sp. nov. Tolmomyias sulphurescens (Spix) Guyana p. p.

sayornis Glowska, 2014 Sayornis nigricans (Swainson) Peru Glowska 2014

schmidti sp. nov. Lophotriccus pileatus (Tschudi) Peru p. p.

Hemitriccus margaritaceiventer (Orbigny & Lafresnaye) Guyana p. p.

Syringophilopsis empidonax Skoracki , Empidonax hammondii (Xantus de Vesey) USA Skoracki et al. 2008

Flannery and Spicer, 2008

E. wrightii Baird USA Skoracki et al. 2008

tyranni Bochkov and Galloway, 2004 Tyrannus tyrannus (L.) Canada Bochkov & Galloway 2004

T. verticalis Say USA Skoracki et al. 2008 Myiarchus cinerascens (Lawrence) USA Skoracki et al. 2008 M. crinitus (L.) USA Skoracki et al. 2008 Myiopagis subplacens (Sclater) Peru Glowska 2014

szeffleri Glowska, 2014 Lophotriccus pileatus (Tschudi) Peru Glowska 2014

Figures

FIGURES 1 – 4. Picobia ochoi sp. nov., non-physogastric female: 1 — dorsal view, 2 — ventral view, 3 — hypostomal apex, 4 — peritremes. Scale bars: 1, 2 = 100 µm; 3, 4 = 50 µm.

FIGURES 5 – 8. Picobia ochoi sp. nov., physogastric female: 5 — dorsal view, 6 — ventral view, 7 — hypostomal apex, 8 — peritremes. Scale bars: 5, 6 = 200 µm; 7, 8 = 50 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.