*hibernica (Bagnall, 1941)
*trioculata Denis, 1922 [not (Kinoshita, 1916)]
Anurida denisi is a dark blue littoral species very similar in general appearance to Anurida maritima. However, Anurida denisi has eyes with 3+3 ocelli (Fig. 1) and highly distinctive mouthparts (Fig. 2). This has led some authors to place it in the genus Gastranurida. The post-antennal organ (PAO) is circular with between 8 and 13 vesicles (Fig. 3); the species does not possess a furca or an empodium on the foot. Several of Bagnall's specimens which Steven examined were named Anurida hibernica, but this was shown by Lawrence & Goto (1968) to be a junior synonym of Anurida denisi. The species is probably widely-distributed around the coast of Britain and Ireland. It is easy to confuse with Anurida maritima in the field and this is likely to have led to Anurida denisi being under-recorded. The largest specimen Steven saw was 1.7 mm in length.