Schizocarpus azasicus, Bochkov, Andre V. & Saveljev, Alexander P., 2012

Bochkov, Andre V. & Saveljev, Alexander P., 2012, Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) from the Eurasian beaver Castor fiber tuvinicus Lavrov (Rodentia: Castoridae) in the Azas River (Tuva Republic, Russia), Zootaxa 3410, pp. 1-18 : 12-13

6. Schizocarpus azasicus sp. nov.

( Fig. 7 )

Description. MALE (holotype). Idiosoma slightly flattened dorso-ventrally. Hysterosoma outline in shape of inverted trapezium. Body 350 long and 175 wide; body length/width ratio about 2:1. Hysteronotal shield 80 long and 90 wide. Anterior margin of hysteronotal shield uneven with distinct incision in median part. Setae d1 situated slightly anterior to anterior margin of this shield, distance d1-d1 30. Setae e1 situated distinctly posterior to posterior margin of hysteronotal shield, almost at posterior margin of opisthosoma, distance e1-e1 30. Bases of setae h1 adjoining bases of seta e1. Setae f2 situated ventro-medially. Setae h3 situated close to each other, distance h3-h3 35. Opisthosomal membranes weakly developed, 5 long. Setae ps3 situated laterally and along with setae ps2 strongly displaced posteriorly being located posterior to level of adanal suckers. Adanal shields subtriangular in outline, evenly punctated with strongly sclerotized anterior, internal and external borders. Minimal distance between these shields 25. Adanal suckers situated in anterior half of adanal shields, about 8 in diameter, with smooth corolla (type A), without external sclerotized ring. Setae ad1 represented by large alveoli, about 2.5 times larger than adanal suckers, located between adanal shields. M-shaped sclerite situated between adanal shields and surrounding these alveoli present. Setae ps1 not pedunculate, situated at lateral ends of M-shaped sclerite, at same transverse level with adanal suckers; distance ps1-ps1 20 long. Adanal alveoli ad2 absent. Ventral anal sclerite distinct. Lengths of some setae: f2 and h3 about 15, h1 3, h2 60, ps2 and ps3 about 45. Tarsus III 20 long, 12 wide; tarsus IV 10 long, 10 wide.

Type material. Holotype male ( ZISP T-Chir-25 ) ex Castor fiber tuvinicus [beaver #5, sample 8], RUSSIA: Tuva, Todzhinskii District, downstream of Azas River , 52º32’N, 97º15’E, 17 October 2011, coll. A.P. Saveljev.

Type deposition. Holotype—in ZISP.

Microhabitat.?Posterior leg.

Distribution. Type locality only.

Etymology. The species epithet derives from the name of Azas River, the type locality of this species.

Differential diagnosis. This new species is very close to S. subornatus Fain and Lukoschus, 1985 , found on a Eurasian beaver of unknown origin ( Fain & Lukoschus 1985) and C. f. tuvinicus (present paper), and differs from this species mostly by shorter setae h3 and f2 of about 15 long (versus 50 and 45 long, respectively, in S. subornatus ).

Figures

FIGURE 7. Schizocarpus azasicus sp. nov., male: A—opisthosoma in dorsal view; B—same, in ventral view.