Picobia dinemellia, Glowska, Eliza & Skoracki, Maciej, 2011

Glowska, Eliza & Skoracki, Maciej, 2011, Two new quill mite species (Acari, Cheyletoidea, Syringophilidae) parasitizing Dinemellia dinemelli (Rüppell) (Passeriformes, Ploceidae), Zootaxa 3114, pp. 63-68 : 64-68

Picobia dinemellia sp. nov.

( Figs. 6–18 )

NON-PHYSOGASTRIC FEMALE (holotype) ( Figs. 6–12 ). Total body length of holotype 785. Gnathosoma . Hypostomal apex rounded with shoulders ( Fig. 8 ). Infracapitulum apunctate. Peritremes M-shaped, each medial branch with 5 chambers, each lateral branch with 9–10 chambers ( Fig. 10 ). Movable cheliceral digit 190 long. Stylophore apodemes 230 long. Idiosoma . Propodonotal shield punctate and divided into three sclerites, 2 narrow lateral shields, bearing bases of setae ve, si and se and small oval median fragment. Setae vi and ve situated at same transverse level. All propodonotal setae slightly beaded ( Fig. 9 ). Length ratio of setae vi: si 1:1.5. Setae c1 located very slightly anterior to level of setae se. Setae d1 situated equidistant to setae d2 and e2. Pygidial shield well developed and punctate. Length ratio of setae f2:f1 1.1–1. Setae f1 2.7 times longer than h1. Aggenital setae ag1 situated anterior to level of setae ag2 ( Fig. 11 ). Length ratio of setae ag1: ag2 2:1. Setae ps1 and ps2 subequal in length. Setae g1 short and situated on genital lobes. Setae 3c 4.5 times longer than 3b. Coxal fields I–IV well developed, apunctate. Legs. Antaxial and paraxial members of claw pairs III and IV subequal in size and shape. Setae tc” III–IV 1.9 times longer than tc’ III–IV. Lengths of setae: vi 115, ve more than 110, si 180, se 230, c1 255, c2 170, d1 135, d2 180, e2 95, f1 55, f2 60, h1 20, ps1 30, ps2 30, g1 15, ag1 120, ag2 60, ag3 more than 95, tc’ III–IV 40, tc” III–IV 75, 3b 20, 3c 90.

PHYSOGASTRIC FEMALE (3 paratypes). Body worm-shaped in outline, 1030–1135 long. Lengths of setae: vi 120–130, ve 120–135, si 175–200, se 215–250, c1 250–280), c2 155–195, d1 130–165, d2 180–195, e2 105–120, f1 55–60, f2 50–70, h1 30, ps1 25, ps2 35–40, g 1 15–20, ag1 95–105, ag2 50–55, ag3 120–125, tc’ III–IV 40–55, tc” III–IV 70–80, 3b 20–25, 3c 90–95.

MALE (1 paratype) ( Figs. 13–18 ). Total body length 440. Gnathosoma . Infracapitulum apunctate. Hypostomal apex rounded. Peritremes M-shaped, each medial branch with 4 chambers, each lateral branch with well visible 6 chambers ( Fig. 17 ). Idiosoma . Propodonotal shield entire, lateral borders strongly sclerotized, punctate, bearing bases of setae vi, ve, si, se and c1. Setae ve situated anterior to setae vi bases. Length ratio of setae vi: ve 1:1.4. Setae c1 located slightly anterior to level of setae se. Hysteronotal shield not fused to pygidial shield, punctate, bearing bases of setae d1 and e2. Setae d2 5.3 times longer than e2. Pygidial shield well developed, apunctate. Setae h2 13 times longer than f2. Alveolae of setae 3a–3a not coalesced. Length ratio of setae ag1: ag2 4.3:1. Setae 3c 2.2 times longer than 3b. Coxal fields I–IV well developed, apunctate. Lengths of setae: vi 55, ve 75, si 110, se 115, c1 105, c2 95, d2 80, e2 15, h2 130, f2 10, ag1 65, ag2 15, ps1 5, ps2 10, g1, g2 5, l’ RIII 20, l’ RIV 20, 3b 25, 3c 55.

Type material. Female holotype, 3 physogastric female paratypes and 1 male paratype from body feathers of a White-faced Buffalo Weaver Dinemellia dinemelli ( Passeriformes : Ploceidae ).

Type deposition. All material deposited in the AMU.

Etymology. The specific epithet is taken from the generic name of the host.

Differential diagnosis. This new species is morphologically similar to P. indonesiana Skoracki & Glowska described from the Asian Glossy Starling Aplonis panayensis (Scopoli) ( Passeriformes : Sturnidae ) ( Skoracki & Glowska 2008). In females of both species, the hypostomal apex is rounded with shoulders, the lateral branch of the peritremes have similar number of chambers, the propodonotal shield is represented by three sclerites, setae vi and ve are situated at the same transverse level, the length ratio of setae f2:f1 is 1–1.2:1, the pygidial shield is well sclerotized and punctate, and the opisthosomal lobes are present. These two species are distinguishable by the following characters: in females of P. dinemellia sp. nov., the length ratio of setae ag1:ag2:ag3 is 2:1:2.5, the lengths of setae d1, h1 and ag2 are 130–165, 30 and 50–55, respectively. In females of P. indonesiana , the length ratio of ag1:ag2:ag3 is 4.3:1:6.3, the lengths of setae d1, h1 and ag2 are 65, 95 and 20, respectively.

Figures

FIGURES 6 – 12. Picobia dinemellia sp. nov. Female. 6 — dorsal view, 7 — ventral view, 8 — hypostomal apex, 9 — propodonotal seta vi, 10 — peritremes, 11 — terminal opisthosoma in ventral view, 12 — solenidia of leg I. Scale bars: 6, 7 = 100 µm; 11 = 50 µm; 8 – 10 and 12 = 20 µm.

FIGURES 13 – 18. Picobia dinemellia sp. nov. Male. 13 — dorsal view, 14 — ventral view of gnathosoma and propodosoma, 15 — leg III in ventral view, 16 — terminal opisthosoma in ventral view, 17 — peritremes, 18 — genito-anal region. Scale bars: 13, 14, 16 = 100 µm; 15 = 50 µm; 17, 18 = 20 µm.