The order Diplura is one of the four groups of hexapods, alongside insects, springtails and Protura. They are sometimes called "two-pronged bristletails". Around 800 species have been described, of which around 70 occur in North America, 12 in Great Britain and two in Australia.

The order Diplura is one of the four groups of hexapods, alongside insects, springtails and Protura. They are sometimes called "two-pronged bristletails". Around 800 species have been described, of which around 70 occur in North America, 12 in Great Britain and two in Australia.