Ground spider

Family of spiders


title: "Ground spider" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["gnaphosidae"] description: "Family of spiders" topic_path: "general/gnaphosidae" source: "https://en.wikipedia.org/wiki/Ground_spider" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Family of spiders ::

| fossil_range = | name = Ground spiders | image = Callilepis nocturna.jpg | image_caption = Callilepis nocturna, a ground spider found in the Palearctic realm | image2 = Asemesthes ceresicola 299765819 540074175.jpg | image2_caption= female Asemesthes ceresicola from South Africa | taxon = Gnaphosidae | authority = Banks, 1892 | range_map = Gnaphosidae range map.svg | range_map_caption = blue: reported countries (WSC) green: observation hotspots (iNaturalist) | diversity = 154 genera, 2,498 species

Ground spiders comprise Gnaphosidae, the seventh largest spider family with about 2,500 described species in over 100 genera distributed worldwide. There are 105 species known to central Europe, and common genera include Gnaphosa, Drassodes, Micaria, Cesonia, Zelotes and many others. They are closely related to Clubionidae. At present, no ground spiders are known to be seriously venomous to humans.

Hunting behavior

Ground spiders hunt by active foraging, chasing down and subduing individual prey items. They are adapted to hunting large and potentially dangerous prey, including other spiders, which they subdue by using their silk. When hunting, ground spiders produce thick, gluey silk from their enlarged spinnerets and attempt to use it to entangle their prey in swathing attacks, often applying their webbing to their prey's legs and mouths. By immobilizing potential prey in this manner, ground spiders can subdue proportionally large creatures while reducing risk of injury to themselves from their prey's attempts to fight back.

Description

Spinnerets.jpg|Spinnerets of Herpyllus ecclesiasticus SpiderEnditesAndLabium.jpg|Endites and labium (also fangs and sternum)

Generally, ground spiders are characterized by having barrel-shaped anterior spinnerets that are one spinneret diameter apart. The main exception to this rule is found in the ant-mimicking genus Micaria. Another characteristic is an indentation in the endites (paired mouthparts anterior and lateral to the labium, or lip). All ground spiders lack a prey-capture web and generally run prey down on the surface. They hunt at night and spend the day in a silken retreat.

The genitalia are diverse and are a good model for studying the evolution of genitalia because of their peculiar copulatory mechanism. The thick-walled egg sacs are guarded by the mother until the spiderlings hatch.

Genera

Ammoxenus amphalodes 301149800 542654034.jpg|female Ammoxenus amphalodes Ammoxenus amphalodes 301149489 542653466.jpg|male A. amphalodes Asemesthes flavipes 297522781 535830530.jpg|Asemesthes flavipes Theuma elucubata 300858330 542111562.jpg|male Theuma elucubata

, this family includes 154 genera and 2,498 species:

References

  • (1983): A revision of the American spiders of the genus Zelotes (Araneae, Gnaphosidae). Bulletin of the AMNH 174: 99-191. PDF (29Mb) - Abstract

References

  1. "Family Gnaphosidae Banks, 1892". World Spider Catalog.
  2. Azevedo. (2018). "To complicate or to simplify? Phylogenetic tests of complexity trends and genital evolution in ground spiders (Araneae: Dionycha: Gnaphosidae)". Zoological Journal of the Linnean Society.
  3. Blick. (2004). "Checklist of the spiders of Central Europe. (Arachnida: Araneae)".
  4. Nieuwenhuys, Ed. (2000). "Spiders of NW-Europe".
  5. Wolff. (2017). "Hunting with sticky tape: functional shift in silk glands of araneophagous ground spiders (Gnaphosidae)". Journal of Experimental Biology.

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gnaphosidae