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 mmFemale
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 mmDistribution
Figures
Pedipalp, prolateral view
(Logunov 1996b)
Pedipalp, ventral view
(Logunov 1996b)
Pedipalp, retrolateral view
(Logunov 1996b)
Pedipalp, prolateral view
(Løvbrekke unpubl.)
Pedipalp, ventral view
(Løvbrekke unpubl.)
Pedipalp, retrolateral view
(Almquist 2007)
Pedipalp, ventral view
(Almquist 2007)
Tip of bulbus, ventral view
(Logunov 1996b)
Tip of bulbus, dorsal view
(Logunov 1996b)
Palpal tibia
(Logunov 1996b)
Palpal tibia, retrolateral view
(Løvbrekke unpubl.)
Habitus, dorsal view
(Logunov 1996b)
Habitus, dorsal view
(Logunov 1996b)
Habitus, dorsal view
(Logunov 1996b)
Epigyne, ventral view
(Logunov 1996b)
Epigyne, ventral view
(Kulczyński 1916)
Epigyne
(Løvbrekke unpubl.)
Epigyne
(Almquist 2007)
Epigyne, variation, ventral view
(Logunov 1996b)
Epigyne, variation, ventral view
(Logunov 1996b)
Epigyne, variation, ventral view
(Logunov 1996b)
Vulva
(Logunov 1996b)
Vulva, variation
(Logunov 1996b)
Vulva, variation
(Logunov 1996b)
Vulva, dorsal view
(Løvbrekke unpubl.)
Vulva, dorsal view
(Almquist 2007)
Spermatheca
(Logunov 1996b)
Habitus, dorsal view
(Logunov 1996b)
Habitus, dorsal view
(Logunov 1996b)
Distribution List
"No references" does not mean that the species does not occur in this country, but that we have not yet inserted the reference for it. We are working on it.
References
Aakra K, Hauge E (2003) Checklist of Norwegian spiders (Arachnida: Araneae), including Svalbard and Jan Mayen. Norwegian Journal of Entomology 50: 109-129 
Almquist S (2007) Swedish Araneae, part 2 – families Dictynidae to Salticidae. Insect Systematics & Evolution, Supplement 63(2006): 285-601
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
Koponen S, Marusik Y M, Tanasevitch A V (1998) New data on the spider fauna of the Polar Urals (Aranei). Arthropoda Selecta 6: 109-119
Kronestedt T (2001) Checklist of Spiders (Araneae) in Sweden [Preliminary version February 2001]
Kulczyński W (1916) Araneae Sibiriae occidentalis arcticae. Mémoires de l'Académie Impériale des Sciences de Petrograd (8) 28(11): 1-44
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
Løvbrekke H (unpubl.)
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (13.2.2026) doi: 10.24436/2