Schizocarpus faini, Bochkov, Andre V., Labrzycka, Anna, Skoracki, Maciej & Saveljev, Alexander P., 2012

Bochkov, Andre V., Labrzycka, Anna, Skoracki, Maciej & Saveljev, Alexander P., 2012, Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) parasitizing the Eurasian beaver Castor fiber belorussicus Lavrov (Rodentia: Castoridae) in NE Poland (Suwałki), Zootaxa 3162, pp. 39-59 : 46-47

2. Schizocarpus faini sp. nov.

( Fig. 5 )

Description. MALE (holotype). Body 310 long (300–310 in 10 paratypes) and 150 wide (145–150); body length/ width ratio about 2.1:1. Idiosoma slightly flattened dorso-ventrally. Hysterosoma subparallel sided. Hysteronotal shield 80 long and 90 wide. Anterior margin of hysteronotal shield slightly concave. Setae d1 situated close to anterior margin of this shield, distance d1-d1 40. Setae e1 situated close to posterior margin of hysteronotal shield. Distance e1-e1 about 40. Setae h1 widely separated from each other, distance h1-h1 about 1.4 times longer than e1-e1. Setae f2 situated ventrally, close to h3, distance h3-f2 about 8. Setae h3 situated medially closely to each other, distance h3-h3 about 15. Opisthosomal membranes very short, about 5 long. Setae ps3 situated medially. Adanal shields roughly rounded outline and distinctly sclerotized. Minimal distance between these shields 10. Setae ad1 represented by alveoli and situated immediately anterior to adanal suckers. Adanal suckers situated in posterior half of adanal shields, 8–10 in diameter, with smooth corolla (type A), each surrounded by highly sclerotized punctate ring, which 1.1–1.3 times wider then these suckers. Setae ps1 situated on distinct peduncles located antero-lateral to adanal suckers, at same transverse level or slightly posterior to setae ad1. Distance between adanal sucker and corresponding peduncle bearing ps1 1.5–1.6 times longer than peduncle width. Bases of corresponding setae ad1 and ps1 connected by heavily sclerotized band. Adanal setae ad2 absent. Ventral anal sclerite indistinct. Lengths of some setae: h1, f2, h3, ps3 7–9, h2 55, ps2 45. Tarsus III 25 long, 12 wide; tarsus IV 12 long and 11 wide.

Type material. Holotype male ( ZIN T-Chir-14) and 15 male paratypes ( ZIN AVB- 2011-0504-004, #1-15) from Castor fiber belorussicus [beaver #6], POLAND: Podlaskie Voivodeship, Suwałki County, near Wiżajny village, 54°21'50''N, 22°52'6''E, 18 April 2003, coll. A. Labrzycka; 1 male paratype ( ZIN AVB- 2011-0504-005), same data [beaver # 5].

Type depositions. Holotype and most paratypes—in ZISP, 2 paratypes—in AMU, and 2 paratypes—in UMICH.

Microhabitat. Anterior legs.

Distribution. Type locality only.

Etymology. This species is dedicated to the great Belgian acarologist Prof. Alex Fain (1912–2009).

Differential diagnosis. This new species is close to S. pusillus Fain and Lukoschus, 1985 . In both these species, the idiosoma is slightly flattened dorso-ventrally, setae ps3 are situated at the same longitudinal level with the adanal suckers, setae ad1 and ps1 are located directly anterior and antero-lateral to the adanal suckers, respectively, and bases of these setae of each side are connected by the heavily sclerotized band. These species differ from each other by the following features. In S. faini sp. nov., setae ps1 are located on the peduncles and distinctly lateral to the adanal suckers; setae h3 are situated close to each other, distinctly mesal to the adanal suckers; and setae f2 are located at the same longitudinal level with the adanal suckers or slightly mesal to them. In S. pusillus , setae ps1 are not pedunculate and are located very close to the adanal suckers, almost at the same longitudinal level with them; setae h3 are widely separated from each other and located at the same longitudinal level with the lateral borders of the adanal suckers, and setae f2 are located laterally, near the lateral margins of the adanal shields.

Figures

FIGURE 5. S. faini sp. nov., male: A—opisthosoma in dorsal view; B—same, in ventral view.