VU

Theridion familiare

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Theridion familiare faces significant pressure from habitat degradation in its specialized microhabitats, particularly the loss of old-growth forest structures that provide the specific bark crevices and hollow spaces this species requires. Urban development and intensive forestry practices have reduced the availability of suitable nesting sites, while climate change may be altering the microclimatic conditions essential for this spider's survival and reproduction.

Threat summary

Habitat

This small theridiid spider inhabits bark crevices, hollow tree spaces, and similar protected microhabitats in mature forests. It shows a preference for older woodland areas where complex bark structures and stable microclimatic conditions provide suitable nesting and hunting grounds.

Other threatened species in Theridiidae

Dipoena melanogasterVU

Dipoena melanogaster

Unknown
VU

Pholcomma gibbum

Unknown
Crustulina guttataVU

Crustulina guttata

Unknown
Lasaeola pronaVU

Lasaeola prona

Unknown

Threatened in Belgium

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
Scarce BlackneckCR

Scarce Blackneck

Lygephila craccae

Unknown
Common Fire SalamanderVU

Common Fire Salamander

Salamandra salamandra

Declining

Frequently asked questions

Why is Theridion familiare classified as Vulnerable?
Theridion familiare is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Theridion familiare faces significant pressure from habitat degradation in its specialized microhabitats, particularly the loss of old-growth forest structures that provide the specific bark crevices and hollow spaces this species requires. Urban development and intensive forestry practices have reduced the availability of suitable nesting sites, while climate change may be altering the microclimatic conditions essential for this spider's survival and reproduction.
Where does Theridion familiare live?
Theridion familiare occurs in Belgium, Denmark, France, Germany, Italy, and Netherlands (plus 4 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Theridion familiare?
The main threats to Theridion familiare are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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