Acteon oneroaensis

Acteon oneroaensis is an extinct species of sea snail, a marine gastropod mollusc in the family Acteonidae.

Description
The length of the shell (spire missing) attains 7.2 mm, its diameter 4.5 mm.

Distribution
Fossils of this marine species have been found in Tertiary strata in Oneroa, Waiheke Island, New Zealand