Centromerus arcanus (O. Pickard-Cambridge, 1873)
Description
Male palp with bipartite basal bulbal apophysis. Paracymbium distally with strongly sclerotised bulge. Epigyne reddish brown, with 2 arc-shaped sclerotised bars near base of scapus. Prosoma light yellow to yellow-brown, with thin black margin, head region darkened blackish. Sternum yellow-brown, tinged with black. Chelicerae yellow-brown. Legs darker than prosoma, sometimes almost red-brown. Opisthosoma light whitish, grey-black.
Body length male: 1.5-2.5 mmBody length female: 2-2.5 mm
Additional information
in humid moss of forests, mainly in low mountain ranges
Character states from linyphiid key
Distribution
Phenology
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
 |  |
Figures
Pedipalp, ventral view
(Miller 1958a)
Pedipalp, ventral view
(Wiehle 1956)
Pedipalp, ventral view
(Roberts 1987)
Pedipalp
(Wiehle 1956)
Pedipalp
(Locket & Millidge 1953)
Pedipalp, ventral view
(Miller 1958a)
Pedipalp, retrolateral view
(Løvbrekke unpubl.)
Pedipalp, ventral view
(Løvbrekke unpubl.)
Paracymbium
(Løvbrekke unpubl.)
Paracymbium
(Wunderlich 1973c)
Paracymbium
(Wunderlich 1973c)
Prosoma, lateral view
(Wunderlich 1973c)
Sternum
(Løvbrekke unpubl.)
Chelicera, lateral view
(Locket & Millidge 1953)
Chelicerae, frontal view
(Løvbrekke unpubl.)
Femur I, dorsal view
(Løvbrekke unpubl.)
Epigyne
(Wiehle 1956)
Epigyne
(Roberts 1987)
Epigyne
(Locket & Millidge 1953)
Epigyne
(Løvbrekke unpubl.)
Epigyne
(Lissner & Gravesen 2017)
Vulva
(Wiehle 1956)
Vulva, dorsal view
(Løvbrekke unpubl.)
Femur I, dorsal view
(Løvbrekke unpubl.)
Tibia I, dorsal view
(Løvbrekke unpubl.)
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 
Arnold K (2001) Beitrag zur Spinnenfauna (Arachnida, Araneae) des Fürstentums Liechtenstein. Berichte der Botanisch-Zoologischen Gesellschaft Liechtenstein-Sargans-Werdenberg 28: 211-244
Bosmans R, Van Keer K (2017) Een herziene soortenlijst van de Belgische spinnen (Araneae). Nieuwsbrief van de Belgische Arachnologische Vereniging 32: 39-69
Branco V V, Morano E, Cardoso P (2019) An update to the Iberian spider checklist (Araneae). Zootaxa 4614: 201-254
Cera I (2018) The checklist of Latvian spiders (Arachnida: Araneae). Environmental and Experimental Biology 16: 139-152
Dentici A, Amata F C (2024) New data on the arachnofauna (Arachnidae Araneae Opiliones) of Enna and surrounding areas (Sicily, Italy) with some first reports for Sicily. Biodiversity Journal 15: 363-375
Ivanov V V (2013) The checklist of Belarusian spiders (Arachnida, Araneae). Zoology and Ecology 4: 293-311
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
Kronestedt T (2001) Checklist of Spiders (Araneae) in Sweden [Preliminary version February 2001]
Lavery A (2019) A revised checklist of the spiders of Great Britain and Ireland. Arachnology 18: 196-212
Lissner J, Gravesen E (2017) First record of Centromerus arcanus (O. P.-Cambridge, 1873) from Greenland (Araneae, Linyphiidae) Norwegian Journal of Entomology 64: 19-21
Lissner J, Jensen J-K, Hansen L J, Simonsen W, Kelduni R, Nissen K (2016b) An updated checklist of spiders (Araneae) of the Faroe Islands. Norwegian Journal of Entomology 63: 197-240
Locket G H, Millidge A F (1953) British spiders. Vol. II. Ray Society, London, 449 pp.
Løvbrekke H (unpubl.)
Miller F (1958a) Beitrag zur Kenntnis der tschechoslovakischen Spinnenarten aus der Gattung Centromerus Dahl. Časopis Československé Společnosti Entomologické 55: 71-91
Nekhaeva A A (2020) On the spider fauna (Arachnida: Aranei) of the Kanin Peninsula and Kolguev Island, Nenets Autonomous Okrug, Russia. Arthropoda Selecta 29: 387-398
Pantini P, Isaia M (2019) Araneae.it: the online catalog of Italian spiders, with addenda on other arachnid orders occurring in Italy (Arachnida: Araneae, Opiliones, Palpigradi, Pseudoscorpionida, Scorpiones, Solifugae). Fragmenta Entomologica 51: 127-152
Polchaninova N, Prokopenko E (2019) An updated checklist of spiders (Arachnida: Araneae) of Left-Bank Ukraine. Arachnologische Mitteilungen 57: 60-64 & App
Ponomarev A V (2022) Spiders (Arachnida: Araneae) of the southeast of the Russian Plain: catalogue, the fauna specific features. SSC RAS Publishers, Rostov-on-Don, 640 pp.
Roberts M J (1987) The spiders of Great Britain and Ireland. Volume 2: Linyphiidae and checklist. Harley Books Colchester, England, 204 pp.
Rozwałka R, Stanska M (2008) Check-list of spiders (Araneae) of Poland. 1. December 2008. online at http://www.arachnologia.edu.pl/en/species/8-spiders-of-poland.html
Růžička V, Řezáč M (2022a) Seznam pavouků České republiky. List of spiders of the Czech Republic. Online at https://www.arachnology.cz/seznam-pavouku-cr-26.html and https://www.arachnology.cz/en/seznam-pavouku-cr-26.html
Wiehle H (1956) Spinnentiere oder Arachnoidea, X. 28: Familie Linyphiidae-Baldachinspinnen. Die Tierwelt Deutschlands 44: 1-337
WSC (2024) World Spider Catalog. Version 25.5. Natural History Museum Bern, online at http://wsc.nmbe.ch (31.10.2024) doi: 10.24436/2
Wunderlich J (1973c) Einige seltene Spinnenarten vom Holoh-See bei Wildbad im Schwarzwald (Arachnida: Araneae). Zoologische Beiträge (N.F.) 19: 393-395