Thanatus arcticus Thorell, 1872

Thanatus arcticus Thorell, 1872 View in CoL ( Fig. 1 View Fig )

ặǵḅNjĄŔ ( ljḡ)

Thanatus arcticus Thorell, 1872: 157 View in CoL ; Lenz, 1897: 76; Sørensen, 1898: 225; Fedotov, 1912: 463; Kulczyński, 1916: 24; Holm, 1958: 530; Dondale, Turnbull & Redner, 1964: 651; Holm, 1967: 81; Holm, 1968: 205; Hauge, 1976: 122; Dondale & Redner, 1978: 119; Marusik, 1991: 50; Logunov, 1996: 147; Almquist, 2006: 469; Tang & Wang, 2008: 78; Ono & Ban, 2009: 476; Pajunen, 2009: 86; Zhang, Peng & Zhang, 2022: 264; Marusik & Szűts, 2023: 95.

Thanatus mediocris Kulczyński, 1908: 66 View in CoL ; Logunov, 1996: 135.

Thanatus lapponicus Jackson, 1932: 109 View in CoL .

Thanatus kolymensis Marusik, 1991: 48 View in CoL ; Marusik & Kovblyuk, 2011: 209.

Specimens examined. 1$, Mt. Chiaksan National Park, Hakgok-ri, Socho-myeon , Wonju-si , Gangwon-do , 4 May 2018 ( Kim S. T. & Lee S.Y. leg.); 1$, Namchang Val- ley, Mt. Naejangsan National Park , Sinseong-ri, Bukhamyeon, Jangseong-gun, Jeollanam-do, 16 May 2018 ( Kim S. T. & Lee S.Y. leg.) .

Description. Female. Total length 6.70. Carapace: 2.83 long, 2.62 wide. AER 0.78, PER 1.19. Chelicera: 0.92 long, 0.51 wide. Endite: 0.50 long, 0.41 wide. Labium: 0.27 long, 0.44 wide. Sternum: 1.50 long, 1.38 wide. Legs: I 7.94 (2.37, 1.16, 1.82, 1.47, 1.12)/ II 8.94 (2.68, 1.29, 2.08, 1.70 1.19)/ III 7.80 (2.43, 1.15, 1.86, 1.47, 0.89)/ IV 8.76 (2.65, 1.16, 1.99, 1.86, 1.10). Palp: 2.57 (0.79, 0.49, 0.53, -, 0.76). Epigynum 0.53 long/0.67 wide.

Carapace pear-shaped, brown, clothed densely with short, recumbent, and white hairs, lateral sides dark, cer- vical and radial furrows distinct and dark brown, trans- verse fovea slightly depressed, longer than wide ( Fig. 1A View Fig ). Eight eyes enclosed with a dark patch in two rows, AER slightly recurved and PER strongly recurved, median eyes slightly smaller than lateral eyes ( Fig. 1C View Fig ). Chelicera brown with two promarginal teeth (distal tooth larger than basal tooth). Endite pale brown, anterior margin truncated, longer than wide ( Fig. 1B View Fig ). Labium brown, wider than long ( Fig. 1B View Fig ). Sternum heart-shaped, brown with dark margin, convex, longer than wide, posterior tip round and not protruded between coxae IV, margin clothed sparsely with blackish brown recumbent bristles ( Fig. 1D View Fig ). Legs brown, robust and strongly developed, femora with two dark parallel lines on dorsal surface and two streaks on retrolateral surface, tibiae with a dark smudge proximal- ly, leg spination: I (femur 0-0-0-1-1-1-2d/0v; tibia 0-1d/ 1-2-2v; metatarsus 0d/2-2-0v; tarsus 0d/0v); II (femur 0-1-1d/0v; tibia 0-1d/2-2-2v; metatarsus 0d/2-2-0v; tarsus 0d/0v); III (femur 0-1-1d/0v; tibia 1-2d/2-2-2v; metatarsus 0-1-3d/2-2-1v; tarsus 0d/0v); IV (femur 0-1-1d/0v; tibia 0-2-2d/1-2-2v; metatarsus 1d/2-2-3v; tarsus 0d/0v), leg formula II-IV-I-III. Abdomen ovoid, pale grayish brown, clothed densely with short white hairs, longer than wide, dorsum with a blackish brown longitudinal spear-shaped cardiac pattern occupying anterior half, a pair of blackish brown short streaks posteriorly, clothed sparsely with long blackish brown recumbent bristles ( Fig. 1A View Fig ), venter pale grayish brown, clothed densely with short white and brown hairs ( Fig. 1B View Fig ). Epigynum ( Fig. 1E View Fig ): round and simple, sclerotized, wider than long; median septum broad anteriorly narrowing posteriorly; lateral guide pocket auricu- lar; anteromedial copulatory opening slit-shaped. Internal genitalia ( Fig. 1F, G View Fig ): spermatheca kidney-shaped and grooved posteriorly, almost contiguous each other; receptaculum spherical, approximately equal to receptaculum duct in length, protruded anteromesad.

Habitat. Mountainous mixed forest.

Distribution. Korea (new record), USA ( Alaska), Canada, Greenland, Northern Europe, Russia (Europe to Far East), Kazakhstan, China, Japan.