Vexillum (Costellaria) epigonus R. Salisbury & E. Guillot de Suduiraut, 2006 Vexillum epigonus is a species of small sea snail, marine gastropod mollusk in the family Costellariidae, the ribbed miters.

[2] The length of the shell attains 16 mm.

This marine species occurs off the Philippines and in the East China Sea.

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