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Pseudomelatomidae Genera and species Crassispira Crassispira bifurca (Smith, 1888) Crassispira incrassata (Sowerby I, 1834) Hormospira Hormospira maculosa (Sowerby I, 1834) Knefastia Knefastia dalli Bartsch, 1944 Knefastia olivacea (Sowerby I, 1834) Pilsbryspira Pilsbryspira nymphia (Pilsbry & Lowe, 1932)