Giant Pseudoscorpion

Fast Facts

Latin name: Garypus titanius

Notable feature: World’s largest pseudoscorpion.

Conservation Status: Critically Endangered

Where in the UK: Endemic to Boatswain Bird Island.

Giant Pseudoscorpion (Garypus titanius) © Philip Ashmole

Giant Pseudoscorpion (Garypus titanius) is endemic to Boatswain Bird Island. They are a small, reddish-brown pseudoscorpion with long pedipalps. For a detailed taxonomic description, see Sherwood et al. (2023c). Find out more about Pseudoscorpions.

There is still much to learn about Giant Pseudoscorpion and the other invertebrates that can be found or are still to be discovered in UK Overseas Territories. Our Supporting Atlantic Territories Invertebrate Conservation project will look to support and strengthen invertebrate conservation in these regions.


  • Size: 12-15mm (1.2-1.5cm)
  • Life span: Unknown.
  • Diet: Unknown.
  • Reproduction: Unknown.
  • When to see: Boatswain Bird Island is a highly protected reserve which is at threat of introduction of invasive species and other disturbance. Subsequently, access to the islet is strictly forbidden to any persons without authority.
  • Population Trend: Unknown.
  • Threats: Habitat destruction, non-native species.
  • Fun Fact: A pseudoscorpion so large that even the juveniles are larger than adults of many hundreds of other pseudoscorpion species!

How you can help:

Buglife is working to increase awareness of invertebrates and the Giant Pseudoscorpion through specific projects like Supporting Atlantic Territories Invertebrate Conservation. Visit the project page for more information!


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