Sericosura dissita, n. sp., a Third Hydrothermal Vent Pycnogonida Described from the Northeast Pacific, and Other Known Vent Species

Abstract

Three species of hydrothermal-vent-associated pycnogonids were collected from a feature described as a clump of vent substrate with tubeworms found along the Endeavour Segment of the Juan de Fuca Ridge in the Northeast Pacific. Two of the species are known, having been described from vents in the same vicinity, while the third is a new species, Sericosura dissita. The new species is described, illustrated, and compared with another vent-associated Sericosura species, while the two known species in this collection are diagnosed and their distributions are given.