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., 2022)

Character states from linyphiid key
Distribution
  Presence
  No data
Distribution comment: Albania: Deltshev et al. (2011b): as "I. pr. improbulus"
Global distribution (WSC 2024): Europe, Caucasus, Russia (West Siberia, Central Asia), Kazakhstan, China
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
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.

Albania   (Deltshev et al., 2011b) ||| Austria   (no references) ||| Bulgaria   (Blagoev et al., 2018) ||| Czechia   (Růžička & Řezáč, 2022a) ||| France   (no references) ||| Germany   (no references) ||| Italy   (Pantini & Isaia, 2019) ||| Luxembourg   (Kreuels et al., 2019) ||| North Macedonia   (Komnenov, 2017) ||| Romania   (Nae, 2010) ||| Russia, Eastern   (no references) ||| Russia, Southern   (Otto, 2022; Ponomarev, 2022) ||| 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). 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, Pavlek M, Huber B A, Ballarin F, Tolve M, Čupić I, Hesselberg T, Lunghi E, Mouron S, Graco-Roza C, Cardoso P (2022) A trait database and updated checklist for European subterranean spiders. Scientific Data 9(236): 1-13 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 (2022) Caucasian spiders. A faunistic database on the spiders of the Caucasus Ecoregion. Database version 02.2022. 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). Fragmenta Entomologica 51: 127-152 pdf

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. pdf

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 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

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 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