Arctobius agelenoides (Emerton, 1919)
Description
Male
Palpal tibia without dorsal apophysis. Prosoma mottled with light brown in the middle part, margins light orange, posterior part yellow. Anterior median eyes equidistant from each other and anterior lateral eyes. Sternum, chelicerae and labium dark brown. Opisthosoma with dark median band.
Body length male: 6-8 mmFemale
Epigyne with strongly sclerotized median part of median plate. Colouration as in males.
Body length female: 7-10 mmAdditional information
In moss and under rocks in coniferous forests and glacial moraines
Distribution
Phenology
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
 |  |
Figures
Pedipalp, ventral view
(Lehtinen 1967)
Pedipalp, retrolateral view
(Lehtinen 1967)
Pedipalp, retrolateral view
(Marusik et al. 2012b)
Pedipalp, retrolateral view
(Morka unpubl.)
Pedipalp, retrolateral view
(Almquist 2007)
Pedipalp, ventral view
(Almquist 2007)
Pedipalp, dorsal view
(Marusik & Omelko 2025)
Pedipalp, prolateral view
(Marusik & Omelko 2025)
Pedipalp, retrolateral view
(Marusik & Omelko 2025)
Pedipalp with tibia, patella and femur, prolateral view
(Marusik & Omelko 2025)
Pedipalp with tibia, patella and femur, retrolateral view
(Marusik & Omelko 2025)
Pedipalp, ventral view
(Marusik & Omelko 2025)
Bulbus, anterior view
(Marusik & Omelko 2025)
Bulbus, prolateral view
(Marusik & Omelko 2025)
Bulbus, retrolateral view
(Marusik & Omelko 2025)
Bulbus, ventral view
(Marusik & Omelko 2025)
Embolic division, retrolateral view
(Marusik & Omelko 2025)
Embolic division, retrolateral view
(Marusik & Omelko 2025)
Palpal femur, prolateral view
(Marusik & Omelko 2025)
Palpal tibia, retrolateral view
(Marusik & Omelko 2025)
Habitus, dorsal view
(Palmgren 1977)
Habitus, dorsal view
(Marusik et al. 2012b)
Habitus, dorsal view
(Almquist 2007)
Epigyne, ventral view
(Lehtinen 1967)
Epigyne, ventral view
(Marusik et al. 2012b)
Epigyne, ventral view
(Tanasevitch & Kamayev 2011)
Epigyne, ventral view
(Tanasevitch & Kamayev 2011)
Epigyne
(Morka unpubl.)
Epigyne
(Marusik & Omelko 2025)
Vulva
(Lehtinen 1967)
Vulva, dorsal view
(Morka unpubl.)
Vulva, dorsal view
(Marusik & Omelko 2025)
Vulva, posterior view
(Marusik & Omelko 2025)
Vulva, ventral view
(Marusik & Omelko 2025)
Habitus, dorsal view
(Lehtinen 1967)
Habitus, dorsal view
(Tanasevitch & Kamayev 2011)
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]
Leech R (1972) A revision of the nearctic Amaurobiidae (Arachnida: Araneida). Memoirs of the Entomological Society of Canada 84: 1-182
Lehtinen P T (1967) Classification of the cribellate spiders and some allied families, with notes on the evolution of the suborder Araneomorpha. Annales Zoologici Fennici 4: 199-468
Marusik Y M, Ballarin F, Omelko M M (2012b) On the spider genus Amaurobius (Araneae, Amaurobiidae) in India and Nepal. Zookeys 168: 55-64
Marusik Y M, Omelko M M (2025) Redescription of a monotypic genus Arctobius belonging to a monotypic subfamily from the northern Holarctic (Aranei: Amaurobiidae: Arctobiinae). Arthropoda Selecta 34: 387-395
Morka G H (unpubl.)
Palmgren P (1977) Die Spinnenfauna Finnlands und Ostfennoskandiens VIII. Argyronetidae, Agelenidae, Hahniidae, Dictynidae, Amaurobiidae, Titanoecidae, Segestriidae, Pholcidae und Sicariidae. Fauna Fennica 30: 1-50
Tanasevitch A V, Kamayev I O (2011) Spiders of Kola Peninsula, Russia (Arachnida: Aranei). Caucasian Entomological Bulletin 7: 7-32
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (13.2.2026) doi: 10.24436/2