Clubiona germanica
Local name: dalsäckspindel
Clubiona germanica, known as the German sac spider, is a small nocturnal arachnid belonging to the sac spider family Clubionidae. This pale yellowish-brown spider constructs distinctive silken retreats or 'sacs' under bark, stones, or in leaf litter where it rests during daylight hours.
25
Countries
Photo: iNaturalist: (c) André MIQUET, niektoré práva vyhradené (CC BY-NC), uploaded by André MIQUET
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Arachnida
Order
Araneae
Family
Clubionidae
Genus
Clubiona
Clubiona germanica belongs to the family Clubionidae, order Araneae, within the Arachnida class.
Species Profile
Clubiona germanica, known as the German sac spider, is a small nocturnal arachnid belonging to the sac spider family Clubionidae. This pale yellowish-brown spider constructs distinctive silken retreats or 'sacs' under bark, stones, or in leaf litter where it rests during daylight hours. As a generalist predator, it plays an important role in controlling populations of small arthropods in forest floor ecosystems.
Clubiona germanica faces significant threats from habitat loss and degradation due to urbanization, agricultural intensification, and changes in forest management practices. The species' specialized habitat requirements make it particularly vulnerable to environmental changes, while its limited dispersal ability restricts population recovery and genetic exchange between fragmented populations.
Key Facts
Habitat & Distribution
This species inhabits deciduous and mixed forests, particularly in leaf litter, under bark, and in low vegetation layers of woodland edges and clearings. It shows preference for mature forest habitats with stable microclimate conditions and diverse understory vegetation.
Threats
Agricultural intensification
Habitat fragmentation and loss
Changes in forest management practices
Climate change impacts on microhabitat conditions
Urban development
Found in 25 Countries
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). Clubiona germanica (Clubiona germanica). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/dalsackspindel