Five new subterranean amphipods of the genus from Korea (Crustacea, Amphipoda, Pseudocrangonyctidae).

Although the majority of the species belonging to the genus Akatsuka & Komai, 1922 are found among the subterranean fauna of eastern Asia, the taxonomic knowledge is very poor and only four species have been recorded in Korea. In this study, the morphology of the stygobitic pseudocrangonyctid amphipods from Korean subterranean waters was examined and five new species were identified: has a characteristic emarginated posteroventral margin of epimeral plate 3; differs from other pseudocrangonyctids by the slender and elongated pereopods and more produced posterodistal corner of epimeral plate 3. shows the expanded peduncular articles and a reduced flagellum of antenna 2.

Taxonomic study on the photid amphipods (Senticaudata, Corophiida, Photoidea, Photidae) from Korean waters, with descriptions of a new genus and seven new species.

In this paper, seven new species of the family Photidae from Korean waters are described and illustrated in detail. Among them, is a monotype of the newly reported , which is characterized by slenderer and more elongate pereopods 5-7 than those of other genera of the family Photidae. The genus is reported for the first time from Korean waters based on the description of , which is differentiated from other s group by having weakly sexual dimorphic gnathopods 2, those have simple palmar margins in both sexes.