Neomphalus fretterae McLean 1981

The species that Neomphalus fretterae is most likely to be confused with is Cyathermia naticoides, as both are the same size and very similar in appearance. The main differences are that Neomphalus fretterae has finer reticulate sculpture, a flare at the outer edge of the aperture and the aperture rim is about twice as wide.

Neomphalus fretterae has a moderately large protoconch with reticulate sculpture over the proximal half of the shell. The distal half is smooth, with the outer edge flaring out above the aperture. The aperture is sinuous and there is a wide rim, tapering toward the inner edge, which is visible under the light microscope.

Size under dissecting microscope: 240µm
Size under compound microscope: 250µm