Schizocarpus testiculatus, 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 : 44

1. Schizocarpus testiculatus sp. nov.

( Fig. 4 )

Description. MALE (holotype). Body 370 long (365–380 in 10 paratypes) and 175 wide (175–180); body length/ width ratio about 2.1:1. Idiosoma slightly flattened dorso-ventrally. Hysterosoma subparallel sided. Hysteronotal shield 90 long and 70 wide. Anterior margin of hysteronotal shield uneven and slightly concave in median part. Setae d1 situated on anterior margin of hysteronotal shield or immediately anterior to this margin, distance d1-d1 55. Setae e1 situated posterior to hysteronotal shield. Distance e1-e1 about 70. Setae h1 widely separated from each other, distance h1-h1 about 1.5 times longer than e1-e1. Setae f2 situated dorsally, distance h1-f2 about 12. Setae h3 widely separated from each other, distance h3-h3 90. Opisthosomal membranes moderately developed, about 25 long. Setae ps3 situated laterally, anterior to transverse level of adanal suckers. Adanal shields poorly sclerotized, only external borders of these shields distinctly sclerotized. Setae ad1 represented by alveoli and situated immediately anterior to adanal suckers. Adanal suckers situated in posterior half of adanal shields, 20–25 in diameter, with smooth corolla (type A), each surrounded by highly sclerotized punctate ring, this ring at least 3 times narrower then adanal suckers. Setae ps1 situated on distinct peduncles which fused basally and located between adanal suckers. Adanal setae ad2 absent. Ventral anal sclerite distinct. Lengths of some setae: f2 20, h1 15, h2 125, h3 60, ps2 70, ps3 45. Tarsus III 25 long and 12 wide; tarsus IV 15 long and 13 wide.

Type material. Holotype male ( ZIN T-Chir-13) and 13 male paratypes ( ZIN AVB- 2011-0504-001, #1-13) from Castor fiber belorussicus [beaver #6], POLAND: Podlaskie Voivodeship, Suwałki County, near Wiżajny village, 54°21'50''N, 22°52'6''E, coll. A. Labrzycka; 2 male paratypes ( ZIN AVB- 2011-0504-002, #1, 2) same data [beaver # 5]; 6 male paratypes ( ZIN AVB- 2011-0504-003, #1-6), same data [beaver #4].

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

Microhabitat. Abdomen.

Distribution. Type locality only.

Etymology. This specific epithet derives from testis (testicle, Latin) to refer a similar shape of the basally fused peduncles bearing setae ps1.

Differential diagnosis. This new species differs from all other Schizocarpus spp. with the idiosoma slightly flattened dorso-ventrally by the distinct basally fused peduncles bearing setae ps1. It is close to S. minor ( Dubinina, 1964) having pedunculate setae ps1 closely situated to each other but not fused by their bases. The new species, however, differs from S. minor by several features. In S. testiculatus sp. nov., setae e1 are located posterior to the hysteronotal shield (vs. on the shield in S. minor ), setae ps3 are located laterally, at the same transverse level as adanal setae ad1 (vs. median position), the adanal shields are not punctated (vs. distinctly punctated), and setae ad1 are situated anterior to the adanal suckers (vs. posterior).

Figures

FIGURE 4. S. testiculatus sp. nov., male: A—opisthosoma in dorsal view; B—same, in ventral view.