Therefore, it has been suggested that this species be given top national quarantine significance in the USA.

[1][5][6][7][8][9] The shell is perforate, depressed, smooth, polished throughout, translucent, pale brownish tawny, not distinctly striated, but with microscopic longitudinal impressed lines, slightly flexuous and not close together.

The peristome is thin in one plane, with columellar margin is curved, oblique, never quite vertical, carried forward and briefly reflected above.

The right shell-lobe is small, the left is narrowly reflected over the edge of the peristome, and at the basal side gives off a short tongue-like process.

[2] In the genitalia is a moderately long cylindrical blunt kalc-sac is given off at the junction of the vas deferens, and the caecum of the penis, to which the retractor muscle is attached, is sharply coiled.