Micropilina arntzi is a species of monoplacophoran, a superficially limpet-like marine mollusc.

It is found off the coast of Antarctica.

It has three pairs of gills.

[1] Micropilina arntzi has three pairs of gills, three pairs of nephridia ("kidneys"), six irregularly coiled intestinal loops, two pairs of oesophageal pouches, and no heart.

This mollusc-related article is a stub.