1. Genus Huxleyia A. Adams, 1860
   1. Species Huxleyia cavernicola Hayami & Kase, 1993
   2. Species Huxleyia concentrica (Verco, 1907)
   3. Species Huxleyia diabolica (Jousseaume, 1897)
   4. Species Huxleyia habooba P. G. Oliver & J. D. Taylor, 2012
   5. Species Huxleyia munita (Dall, 1898)
   6. Species Huxleyia pentadonta Scarlato, 1981
   7. Species Huxleyia sulcata A. Adams, 1860
2. Genus Nucinella S. V. Wood, 1851
   1. Species Nucinella adamsii (Dall, 1898)
   2. Species Nucinella boucheti La Perna, 2005
   3. Species Nucinella dalli (Hedley, 1902)
   4. Species Nucinella giribeti Glover & J. D. Taylor, 2013
   5. Species Nucinella kanekoi Matsukuma, Okutani & Tsuchi, 1982
   6. Species Nucinella maoriana (Hedley, 1904)
   7. Species Nucinella maxima (Thiele, 1931)
   8. Species Nucinella owenensis P. G. Oliver & J. D. Taylor, 2012
   9. Species Nucinella pretiosa (A. Gould, 1861)
   10. Species Nucinella serrei E. Lamy, 1912
   11. Species Nucinella subdola (A. M. Strong & Hertlein, 1937)
   12. Species Nucinella surugana Matsukuma, Okutani & Tsuchi, 1982
   13. Species Nucinella viridis Matsukuma, Okutani & Tsuchi, 1982
   14. Species Nucinella viridula Kuznetzov & Schileyko, 1984
   15. Species Nucinella hedleyi Cotton & Godfrey, 1938 accepted as Nucinella dalli (Hedley, 1902)
   16. Species Nucinella maxima (Thiele, 1931) sensu Kuznetzov & Schileyko, 1984 accepted as Nucinella owenensis P. G. Oliver & J. D. Taylor, 2012 (misapplication)
   17. Species Nucinella ovata Jeffreys, 1879, sensu Jeffreys, 1879 accepted as Huxleyia sulcata A. Adams, 1860
   18. Species Nucinella serrei E. Lamy, 1912, sensu J. A. Allen & H. L. Sanders, 1969 accepted as Nucinella adamsii (Dall, 1898) (misapplication)
   19. Species Nucinella woodii (Dall, 1898) accepted as Nucinella adamsii (Dall, 1898)
3. Genus Cyrilla A. Adams, 1860 accepted as Huxleyia A. Adams, 1860 (unnecessary replacement name)
   1. Species Cyrilla dalli Hedley, 1902 accepted as Nucinella dalli (Hedley, 1902) (superseded combination)
   2. Species Cyrilla decussata A. Adams, 1862 accepted as Limopsis decussata (A. Adams, 1862)
   3. Species Cyrilla minuta Dall, 1898 accepted as Cyrilla munita Dall, 1898 (misspelling)
   4. Species Cyrilla munita Dall, 1898 accepted as Huxleyia munita (Dall, 1898) (original combination)
   5. Species Cyrilla sulcata (A. Adams, 1860) accepted as Huxleyia sulcata A. Adams, 1860 (unaccepted > superseded combination)
4. Genus Cyrillista Iredale, 1929 accepted as Huxleyia A. Adams, 1860 (synonym)
   1. Species Cyrillista concentrica (Verco, 1907) accepted as Huxleyia concentrica (Verco, 1907)
5. Genus Cyrillona Iredale, 1929 accepted as Nucinella S. V. Wood, 1851 (synonym)
   1. Species Cyrillona dalli (Hedley, 1902) accepted as Nucinella dalli (Hedley, 1902)
6. Genus Neopleurodon Hertlein & A. M. Strong, 1940 accepted as Nucinella S. V. Wood, 1851 (synonym)
   1. Species Neopleurodon subdolus (A. M. Strong & Hertlein, 1937) accepted as Nucinella subdola (A. M. Strong & Hertlein, 1937)
7. Genus Nuculina A. d'Orbigny, 1844 accepted as Nucinella S. V. Wood, 1851 (Invalid: junior homonym of Nuculina Porro, 1837)
   1. Subgenus Nuculina (Cyrilla) A. Adams, 1860 accepted as Huxleyia A. Adams, 1860
      1. Species Nuculina (Cyrilla) concentrica Verco, 1907 accepted as Huxleyia concentrica (Verco, 1907) (basionym)
   2. Species Nuculina concentrica Verco, 1907 accepted as Huxleyia concentrica (Verco, 1907)
   3. Species Nuculina miliaris (Deshayes, 1829) accepted as Nucinella miliaris (Deshayes, 1829) †
   4. Species Nuculina ovalis sensu E. A. Smith, 1885 accepted as Nucinella pretiosa (A. Gould, 1861) (misapplication)
   5. Species Nuculina ovalis (S. V. Wood, 1840) accepted as Nucinella ovalis (S. V. Wood, 1840) †
   6. Species Nuculina pretiosa A. Gould, 1861 accepted as Nucinella pretiosa (A. Gould, 1861)
8. Genus Pleurodon S. V. Wood, 1840 accepted as Nucinella S. V. Wood, 1851 (Invalid: junior homonym of Pleurodon Harlan, 1831 [Mammalia]; Nucinella is a replacement name)
   1. Species Pleurodon adamsii Dall, 1898 accepted as Nucinella adamsii (Dall, 1898) (original combination)
   2. Species Pleurodon maorianus Hedley, 1904 accepted as Nucinella maoriana (Hedley, 1904)
   3. Species Pleurodon maximus Thiele, 1931 accepted as Nucinella maxima (Thiele, 1931)
   4. Species Pleurodon ovalis S. V. Wood, 1840 accepted as Nucinella ovalis (S. V. Wood, 1840) †
   5. Species Pleurodon pretiosus (Gould, 1861) accepted as Nucinella pretiosa (A. Gould, 1861)
   6. Species Pleurodon subdolus A. M. Strong & Hertlein, 1937 accepted as Nucinella subdola (A. M. Strong & Hertlein, 1937) (original combination)
   7. Species Pleurodon woodii Dall, 1898 accepted as Nucinella adamsii (Dall, 1898) (simultaneously published Pleurodon adamsii given precedence by First Reviser's choice by Huber (2010))

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