On the identity of Pilumnopeus granulatus Balss, 1933 (Crustacea: Decapoda: Brachyura: Pilumnidae), and description of a new Pilumnopeus from Korea

The identity of the poorly known pilumnid crab, Pilumnopeus granulatus Balss, 1933, originally described as a subspecies of Pilumnopeus serratifrons Kinahan, 1856, from Fiji and New Guinea, is clarified based on examination of a syntype. A lectotype is designated and the species is figured and rediagnosed. Specimens from Korea previously assigned to this species are shown to belong to an undescribed taxon, here named Pilumnopeus kimorum sp. nov.

The new species differs markedly from P. serratifrons and P. granulatus s. str. by the structures of the carapace, epistome, male pleon and first gonopods. Records of “ Pilumnopeus granulatus ” from Japan and the Philippines are also referred to as P. kimorum sp. nov.