Pseudosinella halophila is a blind, littoral species which was described by Bagnall in 1939 and seems to be scarce with a southern bias. There are two old records from Kingsteignton in Devon and Cooden beach in Kent, plus an odd-looking record from inter-tidal mud by the Thames below Kew bridge (west London) where one turned up (in 2010) along with Anurida maritima and other coastal species. The clearest diagnostic feature is the presence of a tooth on the outer edge of the empodial appendage of the foot (Fig. 1). The tenant seta on the outer distal tibiotarsus is pointed (cf. Pseudosinella petterseni in which this tenant seta is spatulate).