Maoricolpus finlayi is a species of sea snail, a marine gastropod mollusc in the family Turritellidae.

[1] It is known to occur only in Spirits Bay, North Island, New Zealand.

Maoricolpus finlayi have stout shells with concave bases.

The shells are pale in colour, and have a smal squarish pattern of dots.

[1] The holotype was collected from Piwhane / Spirits Bay, at the northern end of the Aupouri Peninsula in the Northland Region of New Zealand.