Agathotoma estherae is an extinct species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

[1] The height of the shell attains 4.7 mm (0.19 in), its diameter 1.7 mm (0.067 in).

[citation needed] This extinct marine species has been found in Upper Pliocene strata in Estepona, southern Spain.

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