Vexillum pristisinuosum is a species of small sea snail, marine gastropod mollusk in the family Costellariidae, the ribbed miters. Description The length of the shell attains 16.4 mm. Distribution This marine species was found off Shark Bay, Western Australia. References Marrow M.P. (2019). Seven new species of Vexillum (Gastropoda: Costellariidae) from Western Australia. Acta Conchyliorum. 19: 77–94. pristisinuosum Gastropods described in 2019 Gastropods of Australia