Mauidrillia secta
Mauidrillia secta is an extinct species of sea snail, a marine gastropod mollusc in the family Horaiclavidae. Fossils of the species date to the late Eocene strata of the St Vincent Basin of South Australia, and the Otway Basin of South Australia and Victoria.
Description
In the original description, Powell described the species as follows:
The holotype of the species measures in height and in diameter. The shell has a rounded protoconch of 1.5 whorls, with a slightly flattened and deviated tip.
Taxonomy
The species was first described by A.W.B. Powell in 1944. The holotype was collected from the Blanche Point Formation in Aldinga, South Australia at an unknown date prior to 1945, and is held by the Auckland [War Memorial Museum]. In 1981, D. C. Long described a subspecies, M. secta otwayensis, which has since been raised to species level.
Distribution
This extinct marine species occurs in late Eocene strata of the St Vincent Basin and Otway Basin, including the Blanche Point Formation and Browns Creek Formation of South Australia and Victoria.