Schizocarpus pseudonumerosus, 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 : 47-48

3. Schizocarpus pseudonumerosus sp. nov.

( Fig. 3 C, 6)

Description. MALE (holotype). Body 350 long (330–360 in 10 paratypes) and 160 wide (155–160); body length/ width ratio about 2.2:1. Idiosoma slightly flattened dorso-ventrally. Hysterosoma subparallel sided. Hysteronotal shield 80 long and 75 wide. Anterior margin of hysteronotal shield uneven, with median concavity. Setae d1 situated on anterior margin of this shield or immediately anterior to this margin, distance d1-d1 40. Setae e1 situated posterior to hysteronotal shield. Distance e1-e1 35. Setae h1 widely separated from each other, distance h1-h1 85. Setae f2 situated ventro-laterally, anterior to level of setae ps2 bases. Setae h3 situated laterally, distance h3-h3 80. Opisthosomal membranes distinctly developed, 40 long. Setae ps3 situated medially. Each adanal shield consisting of highly sclerotized large lateral arc and central plate connected by its anterior margin with inner end of this arc; outer end of lateral arc situated at same transverse level with bases of setae ps2. Central plate elongated and well sclerotized, excluding distinct non-punctate areas around setae ad1 and adanal suckers. Minimal distance between these shields 7. Setae ad1 represented by alveoli and situated anterior to and at same longitudinal level as adanal suckers. Distance between adanal sucker and seta ad1 subequal to diameter of adanal suckers. Adanal suckers situated in median part of central plate, 10–12 in diameter, with smooth corolla (type A), without external sclerotized ring around. Setae ps1 non pedunculate, situated on central plate distinctly posterior and slightly mesal to adanal suckers. Setae ad1, ps1 and adanal suckers constituting almost straight longitudinal row. Adanal setae ad2 absent. Ventral anal sclerite distinct. Lengths of some setae: h1 16, h2 195, h3 30, f2 40, ps3 20, ps2 35. Tarsus III 25 long, 15 wide; tarsus IV 15 long, 10 wide.

Type material. Holotype male ( ZIN T-Chir-16) and 40 male paratypes ( ZIN AVB- 2011-0504-006, #1-40) from Castor fiber belorussicus [beaver #2], POLAND: Podlaskie Voivodeship, Suwałki County, near Wiżajny village, 54°21'50''N, 22°52'6''E, 17 April 2003, coll. A. Labrzycka; 3 male paratypes ( ZIN AVB- 2011-0504-007, #1- 3), same data, 18 April 2003 [beaver #3]; 23 male paratypes ( ZIN AVB- 2011-0504-008, #1-23), same data [beaver #4]; 5 male paratypes ( ZIN AVB- 2011-0304-009, #1-5), same data [beaver #5]; 4 male paratypes ( ZIN AVB- 2011- 0304-010, #1-4), same data [beaver #6].

Type depositions. Holotype and most paratypes—in ZISP, 4 paratypes—in AMU, and 4 paratypes—in UMICH.

Microhabitat. Head and neck dorsally; few mites on anterior legs.

Distribution. Type locality only.

Etymology. The specific name indicates the similarity of this species to S. numerosus .

Differential diagnosis. This species is close to S. numerosus ( Dubinina, 1964) . In both species, the idiosoma is slightly flattened dorso-ventrally, setae d1 are located on the anterior margin of the hysteronotal shield, setae e1 are located off the hysteronotal shield, setae ps3 are situated at the same longitudinal level with the adanal suckers, setae f2 are situated ventro-laterally and anterior to the level of setae ps2, and three pairs of the opisthosomal ventral setae— ad1, adanal suckers, and ps1 constitute almost a straight longitudinal row. These species differ from each other by the following characters. In S. pseudonumerosus sp. nov., setae ad1 are situated distinctly anterior to the adanal suckers, and setae ps1 are not pedunculate. In S. numerosus , setae ad1 are situated distinctly posterior to the adanal suckers, even posterior than setae ps1; and setae ps1 are pedunculate.

Figures

FIGURE 3. Details of Schizocarpus spp., male: A— S. parahumilis sp. nov. in ventral view; B—same, leg III, in ventral view; C—adanal shield of S. pseudonumerosus sp. nov.; D—adanal shields of S. radiatus Fain and Lukoschus, 1985; E—adanal sucker of S. capitis (Dubinina, 1964) (Photo with Leica microscope).