First recent finding of scallop Chlamys lioica (Pectinidae, Bivalvia)

The purpose of this study was to inform on a first recent finding of scallop Chlamys (?) lioica (Dall, 1907).The research methods consist in description of specimens found in according with generally accepted methods.Results: Two alive specimens of scallop, unlike any known recent Pectinidae from the Northwest Pacific were found in the area of scallop fishery at north Kurile Islands in 2012 and 2017. These specimens identified as Pecten (Chlamys) lioicus Dall, 1907, known before as fossil only.Discussion: The main taxonomic features confirm belonging of these specimens to the genus Chlamys. Some another features as well developed commarginal lamellae of external valves surface, absence of reticulated microsculpture and smooth ventral margin of valves differ these specimens from another Chlamys s. str. species. The correct systematic position of this species may be clarified after examination of additional materials, the name Chlamys lioica (Dall, 1907) may be used until that.The novelty of research is in first recent finding of Chlamys lioica.Conclusion. Two findings of this species at North Kuriles were recorded only. However, this species may inhabit areas outside of main scallop fishing grounds. Rare findings may be explained by rare occasional relocation of some specimens from typical native grounds.