During a survey of Taiwanese waters a new species, Pasiphaea mclaughlinae n. sp., was discovered. This new species belongs to the P. sivado species group which is characterized by having a reduced branchial formula. The new species can be distinguished from other members of this group by the combination of the following characters: flat dorsal surface of the second to fifth abdominal somites, unarmed basis and ischium of the second pereopods, and a lower number of meral spines on the first and second pereopods.
Crustacea, Decapoda, Caridea, Pasiphaeidae, Taiwan, deep sea waters, new species.