CR

Giant Pseudoscorpion

Garypus titanius

Unknown

Overview

Garypus titanius, the giant pseudoscorpion, is the largest species of pseudoscorpion—small, scorpion-looking creatures—in the world. Critically endangered, it is restricted to Boatswain Bird Island, a small rocky island off Ascension Island in the South Atlantic Ocean. Pseudoscorpions are venomous arachnids and are generally tiny—around 3 mm long.

The giant pseudoscorpion, though, can grow to five times that size at 11 mm. It lives among seabird colonies, feeding mainly at night on smaller prey such as insects. It belongs to the Garypidae family.

Garypus titanius faces severe threats from habitat destruction due to urban development and agricultural expansion across its limited range. The species' extremely restricted distribution makes it particularly vulnerable to localized disturbances, while climate change poses additional risks through altered precipitation patterns affecting the microhabitats essential for this pseudoscorpion's survival.

Threat summary

Habitat

Garypus titanius inhabits specialized microhabitats within Mediterranean scrubland and rocky outcrops, typically found under stones, in leaf litter, and within soil crevices. The species requires specific moisture and temperature conditions found in these protected terrestrial environments.

Rocky areas· major

Conservation measures underway

Site/area protectionSpecies recoverySpecies reintroductionEx-situ conservation

Frequently asked questions

Why is Giant Pseudoscorpion classified as Critically Endangered?
Giant Pseudoscorpion 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. Garypus titanius faces severe threats from habitat destruction due to urban development and agricultural expansion across its limited range. The species' extremely restricted distribution makes it particularly vulnerable to localized disturbances, while climate change poses additional risks through altered precipitation patterns affecting the microhabitats essential for this pseudoscorpion's survival.
Where does Giant Pseudoscorpion live?
Giant Pseudoscorpion occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Giant Pseudoscorpion?
The main threats to Giant Pseudoscorpion are 8.1, ai-1, ai-2, and ai-3. The full IUCN-classified threat record for this species is detailed on the species page.

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