Primno evansi Sheader, 1986: 977–979, figs 1–3.
Type material The holotype and paratypes are in the BMNH (1984: 298–302): in spirit.
Remarks
This is the smallest species of Primno, with adults of about 6 mm in length. It is very similar to P. brevidens, and it is possible that it represents a North Atlantic form of this species. However, until more material becomes available it seems prudent to recognise this North Atlantic form as a separate species.