Sperchon (Sperchon) pesici Tuzovskij 2021, sp. n.

• Main Author: Tuzovskij, Petr V.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Trombidiformes; Sperchonidae; Sperchon; Sperchon pesici; Seta; Anadyr; Anadyr’; Magadan; Anadyr River; Ust’-Kamchatsk; Snow Valley; Anadyr'; Chukotka; Kamchatka
• Online Access: https://zenodo.org/record/5918066; https://doi.org/10.5281/zenodo.5918066

Sperchon (Sperchon) pesici sp. n. (Figs 1–9) Type series. Holotype: male, slide 2962, Asia, Russia, Chukotka, Anadyr District, Anadyr River near settlement Markovo, 4. 10. 1976, leg. P. V. Tuzovskij. Paratypes: 5 females 4. 10. 1976, 2 females and 2 males 5.10. 1976 from the same locality as the holotype. Additional material: 3 male and 2 females, Chukotka, Anadyr District, Eropol stream (inflow of the Anadyr River) near village Chuwanskoe, 7. 12. 1978; 1 female, Magadan Province, snow valley near Magadan city, brook, 7. 06. 1982; 3 females, Magadan Province, Tenka District, brook near Neitlin mountain, 1. 07. 1982; 1 male and 1 female, Kamchatka, Ust-Kamchatsk District, brook near biostation “Raduga”, 21.08. 1983, leg. P. V. Tuzovskij. Diagnosis. Dorsalia present, integument with wrinkled lineation, glandularia slightly developed, genital acetabula relatively small and distinctly separated, P-2 ventrodistal projection moderately long and bearing two fine setae, P-3 ventral margin straight, longer than P-2, P-4 shorter than P-3, with proximal tubercle and peg-like seta slightly larger than posterior ones, excretory pore not sclerotized, leg claws with three clawlets. Description. Both sexes. Colour yellow to reddish brown. Idiosoma oval and somewhat flattened. Integument with wrinkled lineation. Idiosomal chaetome typical for the family Sperchontidae (Tuzovskij 1987). Dorsum (Fig. 1) with five pairs of dorsocentralia. Two anterior pairs of dorsocentral plates (dc.1 and dc.2) located lateral to trichobothria Oi, other three pairs of dorsocentral plates (dc.3–dc.5) occupy a central position, dc.1 occasionally separated in two parts. Both pairs of trichobothria (Fp and Oi) placed on small sclerites. Glandularia slightly developed. Anterior coxal groups with rounded medial margins and well separated, apodemes not developed (Fig. 2). Sclerites bearing setae Hv situated near posterolateral angles of coxae II. Posterior coxal groups widely separated, medial parts of coxae III narrow; glandularia Pe open at anteromedial ...