Picobia riparius, Skoracki, 2011

Skoracki, Maciej, 2011, Quill mites (Acari: Syringophilidae) of the Palaearctic region 2840, Zootaxa 2840 (1), pp. 1-414 : 360-363

Picobia riparius sp. nov.

( Figs. 268–271 )

Type host: Riparia riparia (Linnaeus) ( Passeriformes : Hirundinidae ). Type locality: Poland.

Description. PHYSOGASTRIC FEMALE (holotype). Total body length 995 (735 in 2 paratypes). Gnathosoma . Hypostomal apex with pair of blunt-ended protuberances. Peritremes V-shaped. Each medial branch with 3–4 chambers, each lateral branch with 6–7 chambers. Stylophore 200 (180) long. Movable cheliceral digit dentate in posterior part. Idiosoma . Propodonotal shield divided longitudinally into 2 narrow lateral shields, punctate, bearing bases of setae vi, si and sce. Propodonotal setae smooth. Unpaired median shield absent. Setae ve situated anteriorly to level of setae vi. Length ratio of setae vi:ve:si 1:1:1.3. Setae c1 situated anteriorly to level of setae se. Setae f2 slightly (1.2 times) longer than f1. Setae h1 3.8 times longer than f1. Alveoles of setae 3a–3a not coalesced. Genital plates absent. Aggenital setae ag1 situated anterior to level of setae ag2. Length ratio of setae ag1: ag2: ag3 2:1:2. Setae ps1 and ps2 subequal in length. Genital setae hair-like, situated on genital lobes. Coxal fields I–IV well developed, I and II sparsely punctate, III and IV apunctate. Setae 3c about 2.4 times longer than 3b. Legs. Antaxial and paraxial members of claws of legs III and IV subequal in size. Lengths of setae: vi 125 (130–160), ve 145 (130– 170), si (205–210), se 205 (185–230), c1 235 (240–265), c2 200 (210–220), d1 160 (185–205), d2 165 (165–195), e2 85 (85–115), f1 35 (35–55), f2 50 (50–60), h1 180 (160–185), h2 265 (260–270), ag1 80 (70–85), ag2 35 (40), ag3 80–95, ps1 25 (20), ps2 25 (20), g1 25 (20), 3b 20 (30), 3c 55 (65).

MALE. Total body length 365–390 in 2 paratypes. Gnathosoma . Hypostomal apex with pair of small and bluntended protuberances. Stylophore 90–95 long. Peritremes V-shaped, each medial branch with 3–4 chambers, each lateral branch with 6–7 chambers. Idiosoma . Propodonotal shield entire, posterior part indiscernible, bearing bases of setae vi, ve, si and se. Length ratio of setae vi:ve:si 1:1:1.5. Setae ve situated anteriorly to level of setae vi. Setae c1 located anterior to level of setae se. Hysteronotal shield present, entire, weakly sclerotized, bearing bases of setae d1 and e2, sparsely punctate. Setae d1 situated closer to e2 than to d2. Pygidial shield well developed. Two aggenital plates bearing bases of setae ag1. Setae ag1 2.3 times longer than ag2. Setae 3c 3 times longer than 3b. Lengths of setae: vi 45–50, ve 55, si 65–90, se 100–110, c1 110–130, c2 85–125, d2 95, h2 150, ag1 20–35, ag2 15, 3b 10, 3c 30.

Type material. Riparia riparia (Linnaeus) ( Passeriformes : Hirundinidae ): female holotype (physogastric form) and paratypes: 3 females (physogastric form) and 2 males ( AMU –SYR.211) (bod.); POLAND, Lubuskie, Zielona Gora , 4 June 2003, coll. M. Skoracki.

Type deposition. All type material deposited in the AMU .

Etymology. The name refers to the generic and specific name of the host.

Differential diagnosis. This new species is morphologically similar to P. eremophila , described below. In females of both taxa, the movable cheliceral digits are with cuticular processes in the posterior part; terminal setae h1 are 3.8–4 times longer than f1; the pygidial shield is well developed and not divided longitudinally; aggenital setae ag2 are situated posterior to the level of setae ag1; the genital setae are hair-like, situated on the well developed genital lobes and longer than the pseudanal setae; the antaxial and paraxial members of claws of legs III and IV are subequal in size. P. riparius is distinguished from P. eremophila by the following characters: in female of P. riparius , setae ag1 are twice as long as ag2; setae h1 are 3.8 times longer than f1; bases of setae 3a–3a are distinctly separate to each other; the propodonotal setae are smooth. In females of P. eremophila , setae ag1 and ag2 are subequal in length; setae h1 are 5.4 times longer than f1; bases of setae 3a–3a are very close to each other; the propodonotal setae lightly beaded.

Host range and habitat. Monoxenous species inhabiting quills of body feathers of Riparia riparia .

Distribution. Poland.

Figures

FIGURE 268. Picobia riparius sp. nov., female (physogastric form). A, dorsal view of anterior part of body; B, ventral view of anterior part of body.

FIGURE 269. Picobia riparius sp. nov., female (physogastric form). A, opisthosoma in ventral view; B, opisthosoma in dorsal view; C, genital and pseudanal setae. Scale bars: A, B = 100 µm; C = 20 µm.

FIGURE 270. Picobia riparius sp. nov., male. A, dorsal view; B, ventral view.

FIGURE 271. Picobia riparius sp. nov., female (A–F). A, hypostomal apex; B, peritreme; C, solenidia of leg I; D, posterior part of movable cheliceral digit; E, propodonotal setae ve; F, claw pair of leg III; G, coxal fields I and II. Male (H– I). H, hypostomal apex; I, peritremes; J, genito-anal region. Scale bars: G = 50 µm; A–F, H–J = 20 µm.