Ideoblothrus nesotymbus is a species of pseudoscorpion in the Syarinidae family.

The specific epithet nesotymbus comes from Greek: nesos (‘island’) and tymbos (‘tomb’), with reference to the type locality.

The colour of carapace and pedipalps is reddish-brown, with the chelicerae and coxae orange, legs and abdomen pale tan.

[1] The species occurs on Barrow Island off the Pilbara coast of North West Australia.

The type locality is a borehole in limestone karst, 5.8 km north-west of Chevron Texaco Camp.