Resources:
Philodromidae  Thorell, 1870 / Thanatus  C. L. Koch, 1837   35 species

Thanatus arcticus  Thorell, 1872

Description
Male

Prosoma pale brown, with light area from middle to anterior eyes, medially with 2 dark parallel lines. On each side 4 radiating dark lines. Opisthosoma with lanceolate on anterior half and longitudinal marking. Palp: Tibial retrolateral apophysis shorter than tibia. Cymbium with 4-5 spines basally. Embolus with curved tip and twisted base.

Prosoma length: 2.9 mm, prosoma width: 2.7 mm.

Body length male: 7.3-10 mm
Female

Colouration as in male. Epigyne: Epigynal plate wider than long. Atrium divided by broad septum, tapering posteriad. Openings on ventral side. Receptacles compact and complicated, with glands.

Body length female: 9.7-10.5 mm
Distribution
  Presence
  No data
Global distribution (WSC 2020): USA (Alaska), Canada, Greenland, Northern Europe, Russia (Europe to Far East), Kazakhstan, China, Japan
Figures
Distribution List
Finland   (Koponen et al., 2016) ||| Norway   (Aakra & Hauge, 2003) ||| Russia, Northern   (no references) ||| Sweden   (Kronestedt, 2001) |||
References

Aakra K, Hauge E (2003) Checklist of Norwegian spiders (Arachnida: Araneae), including Svalbard and Jan Mayen. Norwegian Journal of Entomology 50: 109-129 pdf

Koponen S, Fritzén N R, Pajunen T (2016) Checklist of spiders in Finland (Araneae). 6th version, December 2016, online at http://biolcoll.utu.fi/arach/checklist_of_spiders_in_Finland.htm pdf

Kronestedt T (2001) Checklist of Spiders (Araneae) in Sweden [Preliminary version February 2001] pdf

Kulczyński W (1916) Araneae Sibiriae occidentalis arcticae. Mémoires de l'Académie Impériale des Sciences de Petrograd (8) 28(11): 1-44 pdf

Logunov D V (1996b) A critical review of the spider genera Apollophanes O. P.-Cambridge, 1898 and Thanatus C. L. Koch, 1837 in North Asia (Araneae, Philodromidae). Revue Arachnologique 11: 133-202 pdf

World Spider Catalog (2020) World Spider Catalog. Version 21.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.03.2020) doi: 10.24436/2 pdf

Updates
28-09-2016 Datasheet update Detail
22-07-2014 Image insert
12-11-2013 Image insert