knopphodeedderkopp
Walckenaeria nodosa
Overview
The knopphodeedderkopp (Walckenaeria nodosa) is a tiny sheet weaver spider characterized by distinctive nodular projections on the male's cephalothorax that give the species its common name. These minute spiders construct delicate sheet webs in leaf litter and low vegetation, playing a crucial role as predators of small arthropods including springtails, aphids, and other micro-invertebrates in their ecosystem.
Walckenaeria nodosa faces significant threats from habitat loss and degradation due to agricultural intensification and urban development in its limited range. Climate change and associated shifts in microhabitat conditions pose additional risks to this specialized spider species with restricted distribution.
Habitat
Walckenaeria nodosa inhabits the interface between soil surface and low vegetation, particularly favoring areas with dense leaf litter, moss cushions, and the bases of grasses in humid woodland edges and grassland margins. The species requires stable microclimatic conditions with consistent moisture levels and protection from direct sunlight.
Other threatened species in Linyphiidae
Threatened in Åland Islands
Frequently asked questions
Why is knopphodeedderkopp classified as Endangered?
Where does knopphodeedderkopp live?
What are the main threats to knopphodeedderkopp?
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