Dictyna major
CR

Dictyna major

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Dictyna_major

Overview

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

Dictyna major faces severe population declines due to habitat destruction from urbanization and agricultural expansion, which eliminates the specific microhabitats this specialized spider requires. Climate change and pollution further threaten remaining populations by altering the delicate ecological conditions necessary for web construction and prey availability.

Threat summary

Habitat

This species inhabits specific microhabitats including bark crevices of mature deciduous trees, wooden structures, and stone walls in temperate regions. It constructs distinctive mesh webs in sheltered locations with appropriate humidity and temperature conditions.

TERRESTRIAL· major

Other threatened species in Dictynidae

Water SpiderVU

Water Spider

Argyroneta aquatica

Unknown
Argenna patulaCR

Argenna patula

Unknown
EN

Small Mesh-weaver

Dictyna pusilla

Unknown
VU

Brommella falcigera

Unknown

Threatened in Austria

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
VU

Large Tree-chernes

Dendrochernes cyrneus

Unknown
EN

Pipizella nigriana

Unknown

Frequently asked questions

Why is Dictyna major classified as Critically Endangered?
Dictyna major is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Dictyna major faces severe population declines due to habitat destruction from urbanization and agricultural expansion, which eliminates the specific microhabitats this specialized spider requires. Climate change and pollution further threaten remaining populations by altering the delicate ecological conditions necessary for web construction and prey availability.
Where does Dictyna major live?
Dictyna major occurs in Austria, Belgium, Canada, Cape Verde, Estonia, and Finland (plus 9 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 Dictyna major?
The main threats to Dictyna major 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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