Picobia dziabaszewskii, Glowska & Dragun-Damian & Dabert, 2012

Glowska, Eliza, Dragun-Damian, Anna & Dabert, Jacek, 2012, Picobia dziabaszewskii sp. nov. (Acari, Syringophilidae) - combined description (morphology with DNA barcode data) of a new quill mite species parasitizing Garrulax formosus (Passeriformes: Leiothrichidae), Zootaxa 3224 (1), pp. 57-61 : 59

Picobia dziabaszewskii sp. nov.

( Figs. 1–7 )

NON-PHYSOGASTRIC FEMALE (holotype). Total body length 600. Gnathosoma . Hypostomal apex rounded ( Fig. 3 ). Podomeres of palps punctate. Infracapitulum apunctate. Peritremes M-shaped. Each medial branch with 6–8 chambers, each lateral branch with 6–7 chambers (borders between chambers poorly visible) ( Fig. 4 ). Stylophore 185 long, densely punctate in triangular area between medial branches of peritremes. Idiosoma . Propodonotal shield divided into 2 narrow longitudinal sclerites, punctate and bearing bases of setae ve, si and se. Unpaired median shield absent. Setae vi and ve situated at same transversal level. All propodonotal setae beaded ( Fig. 5 ). Length ratio of setae vi:ve:si 1:1:1.2–1.3. Setae c1 located anterior to level of setae se. Setae d1 situated slightly (1.3 times) closer to e2 than to d2. Hysteronotal shield absent. Hysteronotal setae beaded. Pygidial shield well developed, divided longitudinally, densely punctate. Setae f2 1.6 times longer than f1. Length ratio of f1:h1 1:1.3– 1.4. Alveoles of setae 3a-3a not coalesced. Genital plate well developed. Aggenital setae ag1 situated anterior to level of setae ag2. Length ratio of setae ag1:ag2:ag3 1.2:1:1.6. Setae ps1 1.3 times longer than ps2. Genital setae g1 hair-like, situated on genital lobes ( Fig. 6 ). All coxal fields punctate. Setae 3c twice longer than 3b. Legs. Antaxial and paraxial members of claws pairs III and IV unequal ( Fig. 7 ). Length ratio of setae tc’ and tc” of legs III-IV 1:1.4. Lengths of setae: vi 90 (85 in 1 paratype), ve 85 (80), si 105, c2 150 (180), se 170 (170), c1 245 (255), d2 145, d1 125, e2 130 (140), f1 40 (45), f2 70 (70), h1 50 (65), h2 370, ag1 120 (105), ag2 100 (90), ag3 155 (145), g1 (45–50), ps1 45, ps2 35, tc’III-IV 55, tc”III–IV 75, l’RIII 25, l’RIV 25, 3b 40, 3c 80.

PHYSOGASTRIC FEMALE (1 paratype). Body worm-shaped outline, 870 long. Morphology of body and legs as in non-physogastric form.

MALE: Not found.

Type material. Female holotype and 2 females paratypes (physogastric and non-physogastric forms) collected from body feather of Garrulax formosus ( Passeriformes : Leiothrichidae ), originated from China [died in captivity, Hamburg ( Germany)], November 2010, mites removed by E. Glowska. DNA barcode GenBank Accession no. JQ043358 , JQ043359 (COI) and JQ043352 , JQ043353 , JQ043354 , JQ043355 , JQ043356 , JQ043357 (D2) for 2 specimens, voucher no. EG 552, EG 554.

Type deposition. Type material is deposited in the AMU.

Remarks. Intragenomic D2 diversity. For both analyzed individuals we have detected two groups of polymorphic D2 sequences: 744 bp and 745 bp. The sequences differed from each other in 14 nucleotide positions, including one gap in sequences from the first group.

The nucleotide sequence of the COI gene fragment and domene D2 region of 28S rDNA of Picobia dziabaszewskii sp. nov. (Acc. as above) are the first DNA barcode for this genus deposited in a published database (Gen- Bank).

Etymology. This new species is named in honor of the great Polish arachnologist—Prof. Andrzej Dziabaszewski.

Differential diagnosis. This new species is morphologically similar to Picobia cissa Skoracki et al. 2004 described from Cissa chinensis ( Passeriformes : Corvidae ) from North Indochina. Females of both species are characterized by a rounded hypostomal apex, poorly visible borders between chambers of the lateral peritremal branches, propodonotal shield divided into two narrow and punctate sclerites, absence of an unpaired median sclerite on the propodonotum, position of setae vi and ve (situated at the same level), absence of the hysteronotal shield, well developed and densely punctate pygidial shield, hair-like genital setae g1 situated on the genital lobes, and by the punctate coxal fields. These two species are distinguishable by following characters. In females of P. cissa , the length ratio of setae vi:ve:si is 1.5:1:1.8, setae c1 and se are situated at the same level, the pygidial shield is entire, the length ratio of setae f1:h1 and h1:h2 are 4.3:1 and 1:24, respectively, setae ag1 and ag2 are situated at the same level, the antaxial and paraxial members of claws pairs III-IV are subequal, the lengths of setae are: vi 110–135, si 140–170, c2 205–260, se 235–265, d2 225–260, d1 240–260, h1 15, h2 340–370, g1 17 ( Skoracki et al. 2004). In females of Picobia dziabaszewskii sp. nov., the length ratio of setae vi:ve:si is 1:1:1.2–1.3, setae c1 are located anterior to the level of setae se, the pygidial shield is divided longitudinally, the length ratio of setae f1:h1 and h1:h2 are 1:1.3–1.4 and 1:5.6–7.4, respectively, aggenital setae ag1 are situated anterior to the level of setae ag2, the antaxial and paraxial members of claws pairs III and IV are unequal; the lengths of setae are: vi 85–90, si 105, c2 150–180, se 170, d2 145, d1 125, h1 50–65, h2 370, g1 45–50.

Figures

FIGURES 1–7. Picobia dziabaszewskii sp. nov. Female. 1—dorsal view. 2—ventral view, 3—hypostomal apex, 4—peritremes, 5—propodonotal setae vi, 6—terminal opisthosoma in ventral view, 7—claws of leg III. Scale bars: 1, 2 =100 µm; 3, 4, 5,7 = 25 µm; 6 = 50µm.