Pseudomelatomidae Morrison, 1966
Knefastia altenai Macsotay & Campos Villarroel, 2001
Knefastia chira
Knefastia dalli Bartsch, 1944
Knefastia funiculata (Kiener, 1840)
Knefastia hilli Petuch, 1990
Knefastia horrenda (Watson, 1886)
Knefastia howelli (Hertlein & Strong, 1951)
Knefastia nigricans (Dall, 1919)
Knefastia olivacea (Sowerby I, 1834)
Knefastia princeps Berry, 1953
Knefastia tuberculifera (Broderip & Sowerby I, 1829)
Knefastia walkeri Berry, 1958
