Amalda (Baryspira) trachyzonus Kilburn, 1975 alternative representation (basionym) Amalda trachyzonus is a species of sea snail, a marine gastropod mollusk in the family Ancillariidae.

[2] The length of the shell attains 23.5 mm, its diameter 14.7 mm.

This marine species occurs off South Africa.

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