New Record of Ribbed Mitter, Vexillum interruptum (Anton, 1838), from India (Costellariidae: Neogastropoda)

A species of gastropod Vexillum interruptum has been documented for the first time in Chota Balu, South Andaman, situated within the Andaman Islands along the Southeast of mainland India. Specimens were discovered in association with surface vegetation of the seaweed Halimeda opuntia (Linnaeus) Lamouroux, 1816, collected during low tide from the intertidal region. This species is characterized by uniquely intersected short brown parallel lines in the lower part of the ribs, setting it apart from other Vexillum species. The paper provides a brief description, illustration, and outlines the geographical distribution of this species worldwide. The findings highlight the significance of the Andaman Islands in hosting unique marine species and emphasize the need for continued research and conservation efforts in this ecologically rich region.