TWO CARIDEAN SHRIMPS OF THE FAMILIES BRESILIIDAE AND HIPPOLYTIDAE FROM A HYDROTHERMAL FIELD ON THE IHEYA RIDGE, OFF THE RYUKYU ISLANDS, JAPAN

Abstract

Twenty-six specimens representing 2 genera, Alvinocaris of the family Bresiliidae and Lebbeus of the Hippolytidae, were found in samples collected from hydrothermal fields in the Okinawa Trough, Japan. Twenty-one specimens are described as Alvinocaris longirostris, new species, and the remaining 5 are redescribed as a very rare bathyal shrimp, Lebbeus washingtonianus (Rathbun, 1902).