Caviphantes saxetorum
Overview
The elvebreddvergedderkopp (Caviphantes saxetorum) is a small sheet weaver spider endemic to rocky crevices and cliff faces in Scandinavian regions. This diminutive arachnid constructs delicate horizontal webs between rock formations and displays a distinctive pale coloration with darker markings that provide excellent camouflage against lichen-covered stone surfaces. As a specialized predator of small flying insects in alpine and subalpine environments, it plays a crucial role in controlling midge and small fly populations in these harsh ecosystems.
Climate change poses the primary threat to this species as warming temperatures alter the microclimate conditions within its specialized rocky habitat refugia. Additionally, increased recreational climbing and tourism in Scandinavian mountain regions leads to direct disturbance of web structures and potential trampling of critical breeding sites in accessible cliff areas.
Habitat
This species exclusively inhabits narrow crevices and overhanging ledges on limestone and granite cliff faces at elevations between 800-1,400 meters in Norway and Sweden. The spiders require specific microclimatic conditions found in partially shaded rock fissures that maintain consistent humidity levels and protection from extreme weather while providing adequate prey corridors.
Other threatened species in Linyphiidae
Threatened in Austria
Frequently asked questions
Why is Caviphantes saxetorum classified as Endangered?
Where does Caviphantes saxetorum live?
What are the main threats to Caviphantes saxetorum?
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