Genus: Nucula J.B.P.A. Lamarck, 1799 (syn: Nuclea, Nuclula, Polyodanta, Varinucula, Deminucula, Deminucula - DB: 213 SP, 73 IMG)
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Subgenus: Nucula (Pronucula) C. Hedley, 1902 (DB: 8 SP, 0 IMG)
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Subgenus: Nucula (Varinucula) Maxwell, 1988 † (DB: 2 SP, 0 IMG)
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Genus: Nuculavus Tschernyschev, 1943 † (DB: 6 SP, 3 IMG)
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Genus: Nuculoidea H. S. Williams & Breger, 1916 † (DB: 5 SP, 4 IMG)
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Genus: Nuculoma T. Iredale, 1931 (syn: Eunucula, Lionucula, Nuculopsis - DB: 6 SP, 3 IMG)
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