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Linyphiidae  Blackwall, 1859 / Sisicus  Bishop & Crosby, 1938   1 species

Sisicus apertus (Holm, 1939)

WSC LSID urn:lsid:nmbe.ch:spidersp:012665

Key to genera | Key to species

Description

Male palp with long, whip-like embolus. Prosoma dorsally with approximately 10 projecting hairs, prosoma length: 0.7 mm, prosoma height: 0.1 mm.

Body length male: 1.2 mm
Body length female: 1.4 mm
Additional information

Very small species, in moss of forests, boreoalpine species, holarctically distributed

Character states from linyphiid key
Distribution
  Presence
  No data
Global distribution (WSC 2026): North America, Greenland, Alps, Central and Northern Europe, Russia (Europe to Far East)
Figures
species

male Pedipalp, ventral view
(Holm 1945)

species

male Pedipalp
(Holm 1945)

species

male Pedipalp
(Millidge 1977)

species

male Pedipalp
(Morka unpubl.)

species

male Pedipalp, retrolateral view
(Løvbrekke unpubl.)

species

male Palpal tibia
(Holm 1945)

species

male Prosoma, dorsal view
(Holm 1945)

species

male Prosoma, lateral view
(Holm 1945)

species

male Prosoma, dorsal view
(Løvbrekke unpubl.)

species

male Habitus, dorsal view
(Fjellberg unpubl.)

species

female Epigyne
(Vogelsanger 1948)

species

female Epigyne
(Paquin & Dupérré 2003)

species

female Epigyne
(Thaler 1969)

species

female Epigyne, ventral view
(Morka unpubl.)

species

female Epigyne
(Løvbrekke unpubl.)

species

female Epigyne
(Morka unpubl.)

species

female Vulva
(Løvbrekke 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.

Austria   (Thaler, 1999b) ||| Czechia   (Růžička & Řezáč, 2022a) ||| Estonia   (Vilbaste, 1987) ||| Finland   (Koponen et al., 2016) ||| Italy   (Isaia et al., 2025) ||| Liechtenstein   (Arnold, 2001) ||| Norway   (Aakra & Hauge, 2003) ||| Poland   (Rozwałka & Stanska, 2008) ||| Russia, Northern   (Mikhailov, 2013) ||| Slovakia   (Gajdoš et al., 1999) ||| Sweden   (Kronestedt, 2001) ||| Switzerland   (Maurer & Hänggi, 1990) |||
References

Aakra K, Hauge E (2003) Checklist of Norwegian spiders (Arachnida: Araneae), including Svalbard and Jan Mayen. Norwegian Journal of Entomology 50: 109-129 pdf

Arnold K (2001) Beitrag zur Spinnenfauna (Arachnida, Araneae) des Fürstentums Liechtenstein. Berichte der Botanisch-Zoologischen Gesellschaft Liechtenstein-Sargans-Werdenberg 28: 211-244 pdf

Fjellberg A (unpubl.) .

Gajdoš P, Svatoň J, Sloboda J (1999) Katalóg pavúkov Slovenska. Catalogue of Slovakian spiders. Ústav kr. ekol. SAV, Bratislava, 337 pp.

Holm Å (1945) Zur Kenntnis der Spinnenfauna des Torneträskgebietes. Arkiv för Zoologi 36(A15): 1-80 pdf

Isaia M, Tolve M, Pantini P (2025) Araneae.it: 2.0: the new updated version of the digital catalog of the Italian spiders and other arachnids (Arachnida: Araneae, Opiliones, Scorpiones, Pseudoscorpiones, Palpigradi, Solifugae). Fragmenta Entomologica 57: 197-204 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

Kronestedt T (2001) Checklist of Spiders (Araneae) in Sweden [Preliminary version February 2001] pdf

Løvbrekke H (unpubl.)

Maurer R, Hänggi A (1990) Katalog der schweizerischen Spinnen. Documenta Faunistica Helvetiae 12 pdf

Mikhailov K G (2013) The spiders (Arachnida: Aranei) of Russia and adjacent countries: a non-annotated checklist. Arthropoda Selecta, Supplement 3: 1-262 pdf

Millidge A F (1977) The conformation of the male palpal organs of linyphiid spiders, and its application to the taxonomic and phylogenetic analysis of the family (Araneae: Linyphiidae). Bulletin of the British Arachnological Society 4: 1-60 pdf

Morka G H (unpubl.)

Paquin P, Dupérré N (2003) Guide d'identification des araignées de Québec. Fabreries, Supplément 11: 1-251 pdf

Rozwałka R, Stanska M (2008) Check-list of spiders (Araneae) of Poland. 1. December 2008. online at http://www.arachnologia.edu.pl/en/species/8-spiders-of-poland.html 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

Thaler K (1969) Über einige wenig bekannte Zwergspinnen aus Tirol (Arachn., Araneae, Erigonidae). Berichte des Naturwissenschaftlich-Medizinischen Vereins in Innsbruck 57: 195-219 pdf

Thaler K (1999b) Beiträge zur Spinnenfauna von Nordtirol - 6. Linyphiidae 2: Erigoninae (sensu Wiehle) (Arachnida: Araneida). Veröffentlichungen des Tiroler Landesmuseums Ferdinandeum 79: 215-264 pdf

Vilbaste A (1987) Eesti Ämblikud (Aranei). Annoteeritud nimestik. Estonian spiders (Aranei). An annotated check list. Valgus, Tallinn. 113 pp. & 512 maps on 67 unpag. pages pdf

Vogelsanger T (1948) Beitrag zur Kenntnis der Spinennfauna des Kantons Graubünden. Mitteilungen der Naturforschenden Gesellschaft Schaffhausen 22: 33-72 pdf

WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (13.2.2026) doi: 10.24436/2 pdf

Updates
15-10-2025 Distribution update Detail
13-10-2022 Image insert
11-10-2022 Gallery image insert
06-01-2020 Image insert
02-10-2018 Image insert
21-04-2018 Image insert
18-04-2016 Image insert