Robertus insignis
Local name: kärrfuktspindel
Robertus insignis, known as kärrfuktspindel, is a small theridiid spider species with a distinctive dark coloration and compact body structure. This specialized arachnid plays a crucial role as a predator of small invertebrates in its wetland ecosystem, helping maintain the delicate balance of its microhabitat food web.
6
Countries
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Arachnida
Order
Araneae
Family
Theridiidae
Genus
Robertus
Robertus insignis belongs to the family Theridiidae, order Araneae, within the Arachnida class.
Species Profile
Robertus insignis, known as kärrfuktspindel, is a small theridiid spider species with a distinctive dark coloration and compact body structure. This specialized arachnid plays a crucial role as a predator of small invertebrates in its wetland ecosystem, helping maintain the delicate balance of its microhabitat food web.
Robertus insignis, the kärrfuktspindel, is critically endangered due to its extremely limited distribution in specific wetland habitats in Sweden. The species faces severe threats from habitat destruction through wetland drainage, climate change affecting moisture levels, and potential pollution of its specialized bog and fen environments.
Key Facts
Habitat & Distribution
This spider inhabits the moist, moss-rich areas of bogs, fens, and marshy wetlands where it constructs its webs among sedges and other wetland vegetation. It requires consistently high humidity levels and the specific microclimate conditions found in undisturbed peat-based ecosystems.
Threats
IUCN Red List: Critically Endangered
Robertus insignis, the kärrfuktspindel, is critically endangered due to its extremely limited distribution in specific wetland habitats in Sweden. The species faces severe threats from habitat destruction through wetland drainage, climate change affecting moisture levels, and potential pollution of its specialized bog and fen environments.
Climate change and altered hydrology
Extremely small population size and range
Wetland drainage and habitat destruction
Habitat fragmentation
Pollution and eutrophication of wetlands
Found in 6 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). Robertus insignis (Robertus insignis). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/karrfuktspindel