Linyphiidae  Blackwall, 1859 / Improphantes  Saaristo & Tanasevitch, 1996   11 species

Improphantes improbulus  (Simon, 1929)

Description

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

Troglophile species (Mammola et al. 2018)

Character states from linyphiid key
Distribution
  Presence
  No data
Distribution comment: Albania: Deltshev et al. (2011b): as "I. pr. improbulus"
Global distribution (WSC 2020): Europe, Caucasus, Central Asia (Russia, Kazakhstan), China
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
Distribution List
Albania   (Deltshev et al., 2011b) ||| Austria   (no references) ||| Bulgaria   (Blagoev et al., 2018) ||| Czechia   (no references) ||| France   (no references) ||| Germany   (no references) ||| Italy   (Pantini & Isaia, 2019) ||| Luxembourg   (Kreuels et al., 2019) ||| North Macedonia   (no references) ||| Romania   (Nae, 2010) ||| Russia, Eastern   (no references) ||| Russia, Southern   (Otto, 2020) ||| Slovakia   (no references) ||| Spain   (Branco et al., 2019) |||
References

Blagoev G, Deltshev C, Lazarov S, Naumova M (2018) The spiders (Araneae) of Bulgaria. Version: August 2018. National Museum of Natural History, Bulgarian Academy of Sciences. Online at http://www.nmnhs.com/spiders-bulgaria/ (accessed on 10.9.2018) pdf

Branco V V, Morano E, Cardoso P (2019) An update to the Iberian spider checklist (Araneae). [N.B.: few records from this paper are not taken over and not commented] Zootaxa 4614: 201-254 pdf

Deltshev C, Vrenozi B, Blagoev G, Lazarov S (2011b) Spiders of Albania – faunistic and zoogeographical review (Arachnida: Araneae). Acta Zoologica Bulgarica 63: 125-144 pdf

Heimer S (1978) Zur intragenerischen Isolation der Arten der Gattung Pocadicnemis Simon 1884. Zoologische Abhandlungen, Staatliches Museum für Tierkunde Dresden 35: 101-112 pdf

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

Komnenov M (2017) New data on spider fauna (Araneae) of Shar Mountain, north-western Macedonia. Proceedings of the 5th Congress of the Ecologists of Macedonia, with international participation (Ohrid, 19th-22nd October 2016). Special issues of the Macedonian Ecological Society 13: 44-61 pdf

Kreuels M, Staudt A, Christian S (2019) Die Spinnenfauna von Luxemburg – eine Zusammenstellung der Nachweise aus den Jahren 1906-2018 (Arachnida: Araneae). Bulletin de la Société des naturalistes luxembourgeois 121: 203-230 pdf

Mammola S, Cardoso P, Ribera C, Pavlek M, Isaia M (2018b) A synthesis on cave-dwelling spiders in Europe. Zoological Systematics and Evolutionary Research 56: 301-316 pdf

Miller F, Svatoň J (1978) Einige seltene und bisher unbekannte Spinnenarten aus der Slowakei. Annotationes Zoologicae et Botanicae Bratislava 126: 1-19 pdf

Nae A (2010) Improphantes improbulus (Simon, 1929) (Araneae, Linyphiidae) new record for the Roumanian fauna. Travaux de l’Institut de Spéologie “Émile Racovitza” 49: 81-85 pdf

Otto S (2020) Caucasian spiders. A faunistic database on the spiders of the Caucasus Ecoregion. Database version 03.2020. Internet: caucasus-spiders.info.

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

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

Thaler K (1986c) Vier bemerkenswerte Leptyphantes-Arten aus dem Mittelmeergebiet und aus Vorderasien (Arachnida: Aranei, Linyphiidae). Sitzungsberichte der Österreichischen Akademie der Wissenschaften (I) 194: 311-325 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
26-05-2020 Distribution insert Detail
06-01-2019 Distribution update Detail
10-05-2018 Distribution update Detail
20-05-2014 Distribution update Detail
04-12-2013 Distribution update Detail
28-04-2013 Distribution update Detail