First report of Vexillum zelotypum Reeve 1845 (Costellariidae: Neogastropoda) in Korea

The costellariid gastropod Vexillum zelotypum Reeve 1845a is reported for the first time on Jeju Island. Four Costellariidae species are now part of the island's mollusk fauna. Comparisons are made with the original description and descriptions in the literature; some taxonomic comments are also made. The addition of new record to the island's fauna may be the result of previous insufficient sampling, global warming, and possible changes in the warm currents flowing northward to Japan and Korea.