Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) parasitizing the Eurasian beaver Castor fiber belorussicus Lavrov (Rodentia: Castoridae) in NE Poland (Suwałki) Author Bochkov, Andre V. Author Labrzycka, Anna Author Skoracki, Maciej Author Saveljev, Alexander P. text Zootaxa 2012 3162 39 59 journal article 45642 10.5281/zenodo.209978 63ba4cd4-dc7a-438f-b152-6fa11e4bc5d8 1175-5326 209978 8. Schizocarpus parahumilis sp. nov. ( Fig. 3 A, B, 11) Description. MALE ( holotype ). Idiosoma slightly flattened dorso-ventrally. Hysterosoma subparallel sided. Body 325 long ( 320–330 in 3 paratypes ) and 140 wide (135–140); body length/width ratio about 2.3:1. Hysteronotal shield 85 long and 80 wide. Anterior margin of hysteronotal shield widely concave. Setae d1 situated in anterior angles of this shield, distance d1-d1 65. Setae e1 situated on hysteronotal shield, distance e1-e1 35. Setae h1 situated medially, close to each other, distance h1-h1 40. Setae f2 absent. Setae h3 widely separated from each other, distance h3-h3 60. Opisthosomal membranes weakly developed, 10 long. Setae ps3 situated medially. Adanal shields irregularly shaped, completely punctate. Minimal distance between these shields 25. Adanal suckers situated in anterior half of adanal shields, about 7 in diameter, with smooth corolla ( type A), each surrounded by wide and highly sclerotized punctate ring, subequal in width to these suckers. Setae ad1 represented by alveoli and situated on inner margins of adanal shields and distinctly postero-mesal to adanal suckers. Setae ps1 pedunculate, situated postero-lateral to adanal suckers, slightly anterior to level of setae ad1 . Narrow transverse sclerotized band present in posterior half of adanal shield encompassing peduncle bearing ps1 and seta ad1 but not reaching ad1 . Adanal alveoli ad2 present, situated mesal to ps 1 in bases of their peduncles. Ventral anal sclerite small but distinct. Lengths of some setae: h1 6, h2 55, h3 4, ps3 7, ps2 50. Tarsus III 20 long, 14 wide; tarsus IV 10 long, 9 wide. Type material. Holotype male ( ZIN T-Chir-20) and 3 male paratypes ( ZIN AVB- 2011-0504-019, #1-4) 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. Type depositions. Holotype and 3 paratypes—in ZISP , 1 paratype—in AMU. Microhabitat. Throat. Distribution. Type locality only. Etymology. The specific name indicates the similarities with S . humilis and is a noun in apposition. Differential diagnosis. This species is very close to S. humilis Fain and Lukoschus, 1985 and differs from it mainly by the presence of indistinct alveoli of setae ad2 near the bases of pedunculate setae ps1 ; these alveoli are absent in S. humilis .