The Species Status project is a new initiative, that provides up-to-date assessments of the threat status of various invertebrate taxa using the internationally accepted guidelines developed by the International Union for Conservation of Nature (IUCN) (see IUCN, 2012a,b 2013). It is the successor to the JNCC’s Species Status Assessment project which ended in 2008. This publication is one in a series of reviews to be produced under the auspices of the new project.