Ascension Mesh-Web Spider

Fast Facts

Latin name: Thallumetus ascensionensis

Notable feature: One of if not the smallest spiders on Ascension Island, adults are so small that most juveniles of other spiders on the island are larger!

Conservation Status: Not Evaluated

Where in the UK: Ascension Island

Ascension Mesh-Web Spider (Thallumetus ascensionensis) © Danni Sherwood

The Ascension Mesh-Web Spider (Thallumetus ascensionensis) was only recently described, it was possibly introduced, but studies are ongoing. They are a very small, brown spider with beige markings. The carapace is covered in woolly hairs (pubescence). The males have a highly modified palp which includes lots of parts that stick out and make intricate structures used for mating.

There is still much to learn about Ascension Mesh-Web Spider 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: Less than 2mm.
  • Life span: Unknown.
  • Diet: Small invertebrates, likely Collembola and other small insects.
  • Reproduction: Unknown.
  • When to see: Year round.
  • Population Trend: Stable.
  • Threats: Competition from other non-native species.
  • Fun Fact: This spider was so small that for the taxonomy description by Danni Sherwood, a special microscope had to be used to take the photos, and drawings were made by her students to compliment the photos.

How you can help:

Buglife is working to increase awareness of invertebrates and the Ascension Mesh-Web Spider through specific projects like Supporting Atlantic Territories Invertebrate Conservation. Visit the project page for more information!


Do remember that we rely on donations to continue our work. If you have searched, found and learnt about our incredible invertebrates on our website, please do consider Making a DonationBecoming a Member or maybe even making a purchase in our shop.  For more ideas on how to support our work find out how to Get Involved.  Thank you 🕷