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 mmBody length female: 2-2.7 mm
Distribution
Phenology
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
 |  |
Figures
Pedipalp, ventral view
(Heimer & Nentwig 1991)
Pedipalp
(Roberts 1987)
Pedipalp
(Locket & Millidge 1953)
Pedipalp, retrolateral view
(Løvbrekke unpubl.)
Palpal tibia
(Locket et al. 1974)
Palpal tibia, dorsal view
(Løvbrekke unpubl.)
Tibial apophysis
(Heimer & Nentwig 1991)
Tibial apophysis
(Locket & Millidge 1953)
Prosoma, lateral view
(Roberts 1987)
Prosoma, lateral view
(Løvbrekke unpubl.)
Eyes, frontal view
(Locket & Millidge 1953)
Cephalic area
(Locket & Millidge 1953)
Epigyne
(Heimer & Nentwig 1991)
Epigyne
(Roberts 1987)
Epigyne
(Locket & Millidge 1953)
Epigyne
(Løvbrekke unpubl.)
Epigyne
(Aadland unpubl.)
Vulva
(Heimer & Nentwig 1991)
Vulva
(Løvbrekke unpubl.)
Vulva, dorsal view
(Aadland 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
Aadland B (unpubl.) .
Aakra K, Hauge E (2003) Checklist of Norwegian spiders (Arachnida: Araneae), including Svalbard and Jan Mayen. Norwegian Journal of Entomology 50: 109-129 
Agnarsson I (1996) Íslenskar köngulær Fjölrit Náttúrufræðistofnunar 31: 1-175
Arnold K (2001) Beitrag zur Spinnenfauna (Arachnida, Araneae) des Fürstentums Liechtenstein. Berichte der Botanisch-Zoologischen Gesellschaft Liechtenstein-Sargans-Werdenberg 28: 211-244
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
Danflous S, Déjean S, Guerbaa K, Jacquet C, Lecigne S, Montagne D, Montardi Y, Villepoux O (2020b) De araneis Galliae IV. Actualisation du référentiel des araignées de France – première note. Espèces absentes de France ou mises en nomen dubium. Bulletin de l'Association Française d'Arachnologie 5: 10-32
Heimer S, Nentwig W (1991) Spinnen Mitteleuropas. Paul Parey Berlin
Heuts B, Helsdingen P J van (2009) First record of Walckenaeria clavicornis (Araneae, Linyphiidae) in the Netherlands. Nieuwsbrief SPINED 27: 27-28
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, 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.
Locket G H, Millidge A F, Merrett P (1974) British Spiders, Volume III. Ray Society, London, 315 pp.
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). Fragmenta Entomologica 51: 127-152
Roberts M J (1987) The spiders of Great Britain and Ireland. Volume 2: Linyphiidae and checklist. Harley Books Colchester, England, 204 pp.
Tanasevitch A V (2018) New data on spiders (Aranei) from the Novaya Zemlya Archipelago and Siberian Arctic, Russia. Arthropoda Selecta 27: 69-71
WSC (2024) World Spider Catalog. Version 25.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (22.01.2024) doi: 10.24436/2