Linyphiidae  Blackwall, 1859 / Improphantes  Saaristo & Tanasevitch, 1996   7 species

Improphantes improbulus  (Simon, 1929)


Male palp with tapering lamella in distal third, pointed distally. Epigyne with strongly developed epigynal plates, enclosing scapus collar-like, therefore also visible from ventral, posterior part of scapus almost 4 times as wide as long. Prosoma yellow-brown, with or without dorsal spot. Legs clay-yellow. Opisthosoma grey-white to black.

Body length male: 2-2.3 mm
Body length female: 2.1-2.7 mm
Additional information

in litter layer and small caves

Character states from linyphiid key
  No data
Distribution comment: Albania: see Deltshev et al., 2011b
Global distribution (WSC 2017): Europe, Russia to Kazakhstan, China
 male  female

Blagoev G, Deltshev C, Lazarov S, Naumova M (2017) The spiders (Araneae) of Bulgaria. Version: October 2017. National Museum of Natural History, Bulgarian Academy of Sciences. Online at (accessed on 12.10.2017)

Deltshev C, Vrenosi B, Blagoev G, Lazarov S (2011b) Spiders of Albania – Faunistic and Zoogeographical Review (Arachnida: Araneae). Acta zool bulg 63: 125-144

Heimer S (1978) Zur intragenerischen Isolation der Arten der Gattung Pocadicnemis Simon 1884. Zool Abh Staatl Mus Tierk Dresden 35: 101-112

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

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

Miller F, Svaton J (1978) Einige seltene und bisher unbekannte Spinnenarten aus der Slowakei. Annotnes Zool Bot Bratislava 126: 1-19

Otto S (2017) Caucasian spiders. A faunistic database on the spiders of the Caucasus Ecoregion. Database version 08.2017. Internet:

Pantini P, Isaia M (2017) Checklist of the Italian spiders (version May 2017). online at

Staudt A, Weber D, Nährig D (2013) Webspinnen (Arachnida,  Araneae) aus Höhlen des Grossherzogtums Luxemburgs. Ferrantia 69: 115-157

Thaler K (1986c) Vier bemerkenswerte Leptyphantes-Arten aus dem Mittelmeergebiet und aus Vorderasien (Arachnida: Aranei, Linyphiidae). Sber öst Akad Wiss (I) 194: 311-325

World Spider Catalog (2017) World Spider Catalog, version 18.5. Natural History Museum Bern, online at, accessed on 5.10.2017. doi: 10.24436/2

20-05-2014 Distribution update Old value
04-12-2013 Distribution update Old value
28-04-2013 Distribution update Old value