Resources:
Linyphiidae  Blackwall, 1859 / Walckenaeria  Blackwall, 1833   63 species

Walckenaeria clavicornis  (Emerton, 1882)

Description

Tibial apophysis with 2 crossing processes. Epigyne with 2 tongue-shaped plates, reaching far beyond epigastric furrow. Prosoma orange-brown to dark brown with blackish pattern. Legs brown, to orange-brown. Opisthosoma grey-black.

Body length male: 2-2.5 mm
Body length female: 2-2.7 mm
Additional information

In soil crevices with high humidity

Character states from linyphiid key
Distribution
  Presence
  Not established
  No data
Global distribution (WSC 2020): North America, Europe, Russia (Europe to Far East), China, Mongolia, Japan
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
Distribution List
Austria   (no references) ||| Faroe Islands   (Lissner et al., 2016b) ||| Finland   (Koponen et al., 2016) ||| Iceland   (Agnarsson, 1996) ||| Ireland   (no references) ||| Italy   (Pantini & Isaia, 2019) ||| Liechtenstein   (no references) ||| Netherlands   (Heuts & van Helsdingen, 2009) ||| Northern Ireland   (no references) ||| Norway   (no references) ||| Russia, Northern   (no references) ||| Russia, Novaya Zemlya   (Tanasevitch, 2018) ||| Svalbard   (Dahl et al., 2018) ||| Sweden   (no references) ||| Switzerland   (no references) ||| United Kingdom   (no references) |||
References

Agnarsson I (1996) Íslenskar köngulær Fjölrit Náttúrufræðistofnunar 31: 1-175 pdf

Dahl M T, Yoccoz N G, Aakra K, Coulson S J (2018) The Araneae of Svalbard: the relationships between specific environmental factors and spider assemblages in the High Arctic. Polar Biology 41: 839-853 pdf

Heimer S, Nentwig W (1991) Spinnen Mitteleuropas. Paul Parey Berlin pdf

Helsdingen P J van (2010a) Araneae. In: Fauna Europaea Database (Version 2010.1), online at www.european-arachnology.org

Heuts B, Helsdingen P J van (2009) First record of Walckenaeria clavicornis (Araneae, Linyphiidae) in the Netherlands. Nieuwsbrief SPINED 27: 27-28 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

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 pdf

Locket G H, Millidge A F (1953) British spiders. Vol. II. Ray Society, London, 449 pp. pdf

Locket G H, Millidge A F, Merrett P (1974) British Spiders, Volume III. Ray Society, London, 315 pp. pdf

Løvbrekke H (unpubl.)

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). http://araneae.it. Fragmenta Entomologica 51: 127-152 pdf

Roberts M J (1987) The spiders of Great Britain and Ireland. Volume 2: Linyphiidae and checklist. Harley Books Colchester, England, 204 pp. pdf

Tanasevitch A V (2018) New data on spiders (Aranei) from the Novaya Zemlya Archipelago and Siberian Arctic, Russia. Arthropoda Selecta 27: 69-71 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
24-05-2020 Distribution update Detail
05-05-2020 Distribution update Detail
25-03-2018 Distribution update Detail
15-12-2017 Image insert
16-10-2013 Distribution update Detail