PLATYSYMPUS JAPONICUS SP. NOV., A NEW CUMACEAN CRUSTACEA FROM SAGAMI BAY

Abstract

In the Genus Platysympus (Family Lampropidae) there have been three species and one unidentified species. Platysympus typicus (G.O. Sars, 1870), P. tricarinatus Hansen, 1920 and P. sp. (Zimmer, 1940) have been restrictedly recorded within the waters of the northern Atlantic Ocean and the Mediterranean Sea; only P. brachyurus (Zimmer, 1907) has been described from the Antarctic region. The new species to be described here is the first record of the genus from the Pacific Ocean. An adult female specimen was collected from off Shimada, Sagami Bay by R/V Tansei Maru of the Ocean Research Institute, University of Tokyo. The specimen was taken at maximum depth 480 m by oblique haul of ORI-net for macroplankton. The author is grateful to Dr. Masaaki Murano of the Tokyo University of Fisheries who kindly sent him the specimen at his disposal for the study.