Mauidrillia secta
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| Mauidrillia secta Temporal range: | |
|---|---|
 | |
| Holotype from Auckland War Memorial Museum | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Horaiclavidae |
| Genus: | Mauidrillia |
| Species: | †M. secta |
| Binomial name | |
| †Mauidrillia secta A. W. B. Powell, 1944 | |
| Synonyms[1] | |
| |
Mauidrillia secta is an extinct species of sea snail, a marine gastropod mollusc in the family Horaiclavidae.[1] 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.
In the original description, Powell described the species as follows:
Differing from all other species in the deeply incised lines which cut the surface into broad, rounded, spiral folds. Two or three linear grooves below periphery on spire-whorls, nine on body-whorl and base, plus five linear-spaced weaker cords on the anterior end. Subsutural fold moderate. Shoulder without spiral sculpture. Axials very oblique, planed off above, 13 per whorl, strongest at periphery, where they are sharply tubercular, but becoming obsolete before reaching lower suture.[2]
The holotype of the species measures 12 mm (0.47 in) in height and 4.5 mm (0.18 in) in diameter.[2] The shell has a rounded protoconch of 1.5 whorls, with a slightly flattened and deviated tip.[3]