Buccinulum mariae is a species of marine gastropod mollusc in the family Tudiclidae.

It is endemic to the waters of New Zealand.

Buccinulum mariae are typically a dark reddish-brown colour, with some specimens exhibiting a lighter colour and darker spiral bands.

The holotype of the species was 20 mm in height, with a diameter of between 10 and 75 mm,[3] however specimens have been recorded as large as 26 millimetres in height.

[4] The species is Endemic to New Zealand.