抄録
A new troglobitic saipanettid genus was found from submarine caves of Ryukyu Islands. Saipanettids are very close to Paleozoic to Mesozoic Healdiacea and are thought to be a living fossil. It is highly possible that the new troglobitic saipanettid derived from a deep-water saipanettid, Cardobairdia, or its relatives and succeeded in colonizing in submarine caves by adopting a cryptic habit.
