Seguenziidae Verrill, 1884
Asthelys antarctica Marshall, 1988
Asthelys depressa Marshall, 1991
Asthelys munda (Watson, 1879)
Asthelys mundus (Watson, 1879)
Asthelys nitidula Marshall, 1991
Asthelys semiplicata Marshall, 1991
Asthelys simplex (Watson, 1879)
Asthelys spiralis Smith