Sars, 1866
Description:
Carapace length approximately twice the maximum height in both sexes. Fused zone relatively narrow, vestibula correspondingly broad; about ten anterior marginal pore canals. Distal process of male copulatory appendage rounded, subovate, with a small, pointed posterior projection (P. caudata 4 ).
Habitat:
Sublittoral.
Remarks:
The taxonomic confusion over P. caudata has been discussed by Horne,1986b, who re-examined material recorded as P. caudata in the Brady and Norman collections, recognising two new NW European species (P. britannica and P. norvegica) in addition to the true P. caudata.
Distribution:
S Norway, at least some of the previous records of this species from the British Isles can be re-assigned to P. britannica. Records from further afield are also questionable and need confirmation.