The female was first identified in 2008 by Barbara Maria Patoleta.

[1] The species is small and brown, typically measuring 3.6 millimetres (1⁄8 in) long.

[2] Lagnus monteithorum is found in Fiji.

[1] The holotype was discovered at the Nadarivatu Reserve on Viti Levu.

This article related to jumping spiders (Salticidae) is a stub.