Editing Sac spider (section)

{{Short description|Family of spiders}}
{{Automatic taxobox
| fossil_range = {{Fossil range|Palaeogene|present}}
| image = Clubiona trivialis2.jpg
| image_alt = 
| image_caption = ''[[Clubiona trivialis]]''
| taxon = Clubionidae
| authority = [[Eugène Simon|Simon]], 1878
| range_map = Distribution.clubionidae.1.png
| diversity = [[#Genera|18 genera]], [[List of Clubionidae species|665 species]]
}}

The '''sac spiders''' of the family '''Clubionidae'''{{efn|the term "sac spider" is also part of the common name of various non-clubionid spiders&mdash;such as yellow sac spiders ([[Cheiracanthiidae]]) or corinnid sac spiders ([[Corinnidae]])&mdash;many of which were formerly included in Clubionidae}} are nocturnal, sac-building hunting spiders with a near-worldwide distribution. Their sacs, silken retreats in which they hide during the day, may be made in a variety of places, including between folded leaves or grass blades, under bark and below rocks or other ground litter.<ref name="serket">{{cite journal |last1=Das Sarkar |first1=Irina |last2=Quasin |first2=Shazia |last3=Siliwal |first3=Manju |title=Two new species of sac spiders (Araneae: Clubionidae)  from the Indian Western Himalayas |journal=Serket |date=April 2023 |volume=19 |page=126 |url=https://www.researchgate.net/publication/370156209_Two_new_species_of_sac_spiders_Araneae_Clubionidae_from_the_Indian_Western_Himalayas |access-date=26 April 2025}}</ref>

Although formerly a much larger catch-all taxon, in its current definition the family contains less than 700 described species across 18 genera, of which ''[[Clubiona]]'' is by far most species-rich, with 528 accepted species {{as of|lc=y|2024|11}}.<ref name="NMBE-clubiona">{{cite web |title=Clubiona Species list |url=https://wsc.nmbe.ch/specieslist/502 |website=World Spider Catalog Version 25.5 |publisher=Natural History Museum Bern |access-date=26 November 2024}}</ref>