A poorly known brittle star, Ophioplocus giganteus Irimura and Yoshino, 1999 (Ophiuroidea: Ophiurida: Ophiolepididae), is recorded based on two specimens each collected from coastal waters in Takarajima and Tokunoshima islands, the Ryukyu Islands, Japan. The finding of the species represents first records from both two islands and expands the geographical distribution range northward.

吐噶喇列島宝島と奄美群島徳之島沿岸より得られた トラフクモヒトデ Ophioplocus giganteus(クモヒトデ目クモヒトデ科)(上野大輔)