Lissotesta similis is a species of sea snail, a marine gastropod mollusk, unassigned in the superfamily Seguenzioidea.
The shells contains a narrow umbilicus and a high but variable amount of spiral threads. It is very close to liratula.
This species occurs in Antarctic waters, likely with a wide distribution. It was first found at Gauss Station in the Davis Sea. Specimens have also been collected in the Bransfield Strait and the Weddell Sea.