Phenatoma decessor
# Phenatoma decessor

Phenatoma decessor is an extinct species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

## Description

The length of the shell is 17 mm, its width 6 mm. Marwick considered this species a direct ancestor of Phenatoma rosea to which it closely resembles in shape and ornamentation.

## Distribution

This extinct marine species was endemic to New Zealand and fossils were found in fossiliferous beds of calcareous tuffs at Whenuaturu Peninsula.

