Mauidrillia trispiralis

Mauidrillia trispiralis is an extinct species of sea snail, a marine gastropod mollusc in the family Horaiclavidae. Fossils of the species date to the middle Miocene strata of the Otway Basin of Victoria, Australia.

Description

In the original description, Powell described the species as follows:
The holotype of the species measures in height and in diameter.

Taxonomy

The species was first described by A.W.B. Powell in 1944. The holotype was collected from the Gellibrand River in Victoria, Australia at an unknown date prior to 1945, and is held by the Auckland War Memorial Museum. In 1981, D. C. Long theorised that the late Eocene species M. aldingensis was ancestral to M. torquayensis.

Distribution

This extinct marine species occurs in middle Miocene strata of the Otway Basin of Victoria, including the Gellibrand Formation.