Nacella macquariensis is a species of true limpet, a marine gastropod mollusc in the family Nacellidae.

At that time there was confusion as to the correct nomenclature of the limpets found on the different sub-Arctic islands in the southern Indian Ocean.

Finlay determined that the following names should be accepted and the others discontinued: [2] Nacella macquariensis is a flattened cone-shaped shell that adheres closely to the surface of a rock.

[4][5] Like other limpets, Nacella macquariensis is a herbivore, crawling over the surface of rocks to graze on the algal spores and the micro-algae that grow there.

It also feeds on the blades of larger seaweed and eats detached fronds of the kelp Durvillaea antarctica.

[6] Nacella macquariensis plays an important part in the ecology of the foreshore and sub-littoral zone of the islands where it is found.