Abstract
The Japanese species of Pylopaguropsis Alcock, 1905 are reviewed. The genus is rediagnosed, and the gill structure within the genus is discussed. Seven species are recognized, including two species new to science, P, furuset, new species and P. granulata, new species and one species new to the Japanese fauna, P. keijii McLaughlin & Haig, 1989. Taxonomic problems concerning Japanese representative of P. zebra (Henderson, 1893) are discussed. Detailed descriptions and illustrations of the two new species and brief diagnoses and illustrations of the other species are included, together with a key to the Japanese species of Pylopaguropsis.
