1. Subgenus Nassa (Amycla) H. Adams & A. Adams, 1853 accepted as Tritia Risso, 1826
   1. Species Nassa (Amycla) corniculum (Olivi, 1792) accepted as Nassarius corniculum (Olivi, 1792) accepted as Tritia corniculum (Olivi, 1792)
2. Subgenus Nassa (Desmoulea) accepted as Demoulia Gray, 1838 (unaccepted > misspelling - incorrect subsequent spelling)
   1. Species Nassa (Desmoulea) crassa A. Adams, 1853 accepted as Demoulia obtusata (Link, 1807) (synonym)
   2. Species Nassa (Desmoulea) pinguis A. Adams, 1853 accepted as Demoulia obtusata (Link, 1807) (synonym)
3. Subgenus Nassa (Hannonia) Pallary, 1920 accepted as Tritia Risso, 1826 (invalid: junior homonym of Hannonia Hoek, 1881 [Pycnogonida])
4. Subgenus Nassa (Hinia) Leach, 1847 accepted as Tritia Risso, 1826
   1. Species Nassa (Hinia) reticulata (Linnaeus, 1758) accepted as Nassarius reticulatus (Linnaeus, 1758) accepted as Tritia reticulata (Linnaeus, 1758)
5. Subgenus Nassa (Telasco) H. Adams & A. Adams, 1853 accepted as Tritia Risso, 1826 (unaccepted > junior subjective synonym)
   1. Species Nassa (Telasco) azorica Dautzenberg, 1889 accepted as Nassarius recidivus (E. von Martens, 1876) accepted as Tritia recidiva (E. von Martens, 1876)
   2. Species Nassa (Telasco) vitrea Coen, 1914 accepted as Tritia cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (invalid: junior homonym of Nassa vitrea Gray, 1838)
6. Subgenus Nassa (Tritia) Risso, 1826 accepted as Tritia Risso, 1826 (unaccepted > superseded rank)
   1. Species Nassa (Tritia) brychia R. B. Watson, 1882 accepted as Nassarius frigens (E. von Martens, 1878) accepted as Tritia frigens (E. von Martens, 1878)
7. Species Nassa abnormis Coen, 1933 accepted as Nassarius nitidus (Jeffreys, 1867) accepted as Tritia nitida (Jeffreys, 1867) (synonym)
8. Species Nassa acutior Coen, 1933 accepted as Nassarius nitidus (Jeffreys, 1867) accepted as Tritia nitida (Jeffreys, 1867) (synonym)
9. Species Nassa antiquata R. B. Watson, 1897 accepted as Nassarius recidivus (E. von Martens, 1876) accepted as Tritia recidiva (E. von Martens, 1876) (invalid: junior homonym of Nassa antiquata Gabb, 1864)
10. Species Nassa argentea Marrat, 1877 accepted as Nassarius argenteus (Marrat, 1877) (original combination)
11. Species Nassa bicolorata Coen, 1933 accepted as Nassarius nitidus (Jeffreys, 1867) accepted as Tritia nitida (Jeffreys, 1867) (synonym)
12. Species Nassa bourguignati Locard, 1887 accepted as Tritia nitida (Jeffreys, 1867) (synonym)
13. Species Nassa brychia R. B. Watson, 1882 accepted as Nassarius frigens (E. von Martens, 1878) accepted as Tritia frigens (E. von Martens, 1878)
14. Species Nassa bucquoyi Locard, 1887 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (dubious synonym)
15. Species Nassa cancellata Mörch, 1852 accepted as Tritia nitida (Jeffreys, 1867) (unaccepted > junior subjective synonym)
16. Species Nassa circumcincta A. Adams, 1852 accepted as Nassarius circumcinctus (A. Adams, 1852)
17. Species Nassa clodiensis Coen, 1933 accepted as Nassarius nitidus (Jeffreys, 1867) accepted as Tritia nitida (Jeffreys, 1867) (synonym)
18. Species Nassa coralligena Pallary, 1900 accepted as Nassarius coralligenus (Pallary, 1900) accepted as Tritia coralligena (Pallary, 1900)
19. Species Nassa coronata Nobre, 1884 accepted as Nassarius reticulatus (Linnaeus, 1758) accepted as Tritia reticulata (Linnaeus, 1758) (synonym)
20. Species Nassa corrupta Locard & Caziot, 1900 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (synonym)
21. Species Nassa costulata (Brocchi, 1814) sensu Bucquoy, Dautzenberg & Dollfus, 1882 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (unaccepted > misapplication)
22. Species Nassa crispata Marrat, 1877 accepted as Nassarius arcularia plicatus (Röding, 1798) (synonym)
23. Species Nassa cuvieri [sic] accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (misspelling of Nassa cuvierii (Payraudeau, 1826))
24. Species Nassa cuvierii (Payraudeau, 1826) accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814)
25. Species Nassa dautzembergi Mari, 1928 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (synonym)
26. Species Nassa dautzenbergi De Gregorio, 1885 accepted as Nassarius corniculum (Olivi, 1792) accepted as Tritia corniculum (Olivi, 1792) (synonym)
27. Species Nassa delicata Reeve, 1854 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
28. Species Nassa denticulata A. Adams, 1852 accepted as Nassarius denticulatus (A. Adams, 1852) accepted as Tritia denticulata (A. Adams, 1852)
29. Species Nassa deshayesii Drouët, 1858 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
30. Species Nassa ebenacea Gennari, 1866 accepted as Nassarius mutabilis (Linnaeus, 1758) accepted as Tritia mutabilis (Linnaeus, 1758) (synonym)
31. Species Nassa edwardsi P. Fischer, 1882 accepted as Nassarius turulosus (Risso, 1826) accepted as Tritia turulosa (Risso, 1826)
32. Species Nassa elata A. Gould, 1845 accepted as Nassarius elatus (A. Gould, 1845) accepted as Tritia elata (A. Gould, 1845) (unaccepted > superseded combination)
33. Species Nassa elongatula Locard, 1886 accepted as Nassarius pygmaeus (Lamarck, 1822) accepted as Tritia pygmaea (Lamarck, 1822) accepted as Tritia varicosa (W. Turton, 1825) (synonym)
34. Species Nassa encaustica Brusina, 1869 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (synonym)
35. Species Nassa eutacta Locard, 1887 accepted as Tritia pygmaea (Lamarck, 1822) accepted as Tritia varicosa (W. Turton, 1825) (synonym)
36. Species Nassa ferussaci (Payraudeau, 1826) accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814)
37. Species Nassa flava Marrat, 1877 accepted as Nassarius corniculum (Olivi, 1792) accepted as Tritia corniculum (Olivi, 1792) (synonym)
38. Species Nassa frigens E. von Martens, 1878 accepted as Nassarius frigens (E. von Martens, 1878) accepted as Tritia frigens (E. von Martens, 1878) (original combination)
39. Species Nassa gallandiana P. Fischer, 1862 accepted as Nassarius elatus (A. Gould, 1845) accepted as Tritia elata (A. Gould, 1845)
40. Species Nassa gibba M. E. Gray, 1850 accepted as Nassarius mutabilis (Linnaeus, 1758) accepted as Tritia mutabilis (Linnaeus, 1758) (synonym)
41. Species Nassa gibberula Marrat, 1877 accepted as Nassarius corniculum (Olivi, 1792) accepted as Tritia corniculum (Olivi, 1792) (synonym)
42. Species Nassa gibbosula (Linnaeus, 1758) accepted as Nassarius gibbosulus (Linnaeus, 1758) accepted as Tritia gibbosula (Linnaeus, 1758)
43. Species Nassa goreensis Maltzan, 1884 accepted as Nassarius goreensis (Maltzan, 1884) accepted as Tritia goreensis (Maltzan, 1884) (original combination)
44. Species Nassa graniformis Locard, 1886 accepted as Nassarius granum (Lamarck, 1822) accepted as Tritia grana (Lamarck, 1822) (synonym)
45. Species Nassa granum (Lamarck, 1822) accepted as Nassarius granum (Lamarck, 1822) accepted as Tritia grana (Lamarck, 1822)
46. Species Nassa guernei Locard, 1886 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (synonym)
47. Species Nassa helvetica Peyrot, 1925 † accepted as Tritia mutabilis (Linnaeus, 1758) (unaccepted > junior subjective synonym)
48. Species Nassa heynemanni Maltzan, 1884 accepted as Nassarius heynemanni (Maltzan, 1884) accepted as Tritia heynemanni (Maltzan, 1884) (original combination)
49. Species Nassa incrassata (Strøm, 1768) accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (unaccepted > superseded combination)
50. Species Nassa interjecta Locard, 1886 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
51. Species Nassa intermedia Forbes, 1844 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
52. Species Nassa interstincta Marrat, 1878 accepted as Tritia elata (A. Gould, 1845) (junior synonym)
53. Species Nassa isomera Locard, 1886 accepted as Nassarius reticulatus (Linnaeus, 1758) accepted as Tritia reticulata (Linnaeus, 1758) (synonym)
54. Species Nassa italica Issel, 1870 accepted as Cyclope neritea (Linnaeus, 1758) accepted as Tritia neritea (Linnaeus, 1758) (synonym)
55. Species Nassa johni Monterosato, 1889 accepted as Nassarius johni (Monterosato, 1889) accepted as Naytia johni (Monterosato, 1889) (original combination)
56. Species Nassa jousseaumei Locard, 1886 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
57. Species Nassa limata (Chemnitz, 1795) accepted as Nassarius lima (Dillwyn, 1817) accepted as Tritia lima (Dillwyn, 1817) (unaccepted > superseded combination, not available: published in a work rejected by ICZN)
58. Species Nassa mabillei Locard, 1887 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (synonym)
59. Species Nassa madeirensis Reeve, 1854 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (synonym)
60. Species Nassa mamillata (Risso, 1826) accepted as Nassarius nitidus (Jeffreys, 1867) accepted as Tritia nitida (Jeffreys, 1867)
61. Species Nassa mediterranea Risso, 1826 accepted as Nassarius mutabilis (Linnaeus, 1758) accepted as Tritia mutabilis (Linnaeus, 1758) (synonym)
62. Species Nassa mitrella De Gregorio, 1885 accepted as Nassarius corniculum (Olivi, 1792) accepted as Tritia corniculum (Olivi, 1792) (synonym)
63. Species Nassa monilifera Coen, 1933 accepted as Nassarius nitidus (Jeffreys, 1867) accepted as Tritia nitida (Jeffreys, 1867) (synonym)
64. Species Nassa mutabilis (Linnaeus, 1758) accepted as Nassarius mutabilis (Linnaeus, 1758) accepted as Tritia mutabilis (Linnaeus, 1758)
65. Species Nassa neritoides Lamarck, 1816 accepted as Cyclope neritea (Linnaeus, 1758) accepted as Tritia neritea (Linnaeus, 1758) (synonym)
66. Species Nassa nitida Jeffreys, 1867 accepted as Tritia nitida (Jeffreys, 1867) (original combination)
67. Species Nassa oblonga Mörch, 1852 accepted as Nassarius reticulatus (Linnaeus, 1758) accepted as Tritia reticulata (Linnaeus, 1758) (dubious synonym; unavailable name: introduced in synonymy)
68. Species Nassa ovoidea Locard, 1886 accepted as Nassarius ovoideus (Locard, 1886) accepted as Tritia ovoidea (Locard, 1886) (original combination)
69. Species Nassa pinguis A. Adams, 1853 accepted as Demoulia obtusata (Link, 1807)
70. Species Nassa poirieri Locard, 1887 accepted as Nassarius reticulatus (Linnaeus, 1758) accepted as Tritia reticulata (Linnaeus, 1758) (synonym)
71. Species Nassa ponderosa Reeve, 1854 accepted as Demoulia obtusata (Link, 1807)
72. Species Nassa praelonga Monterosato, 1891 accepted as Nassarius lima (Dillwyn, 1817) accepted as Tritia lima (Dillwyn, 1817)
73. Species Nassa pygmaea (Lamarck, 1822) accepted as Nassarius pygmaeus (Lamarck, 1822) accepted as Tritia pygmaea (Lamarck, 1822) accepted as Tritia varicosa (W. Turton, 1825)
74. Species Nassa quercina Marrat, 1880 accepted as Nassarius quercinus (Marrat, 1880) (original combination)
75. Species Nassa renovata Monterosato, 1878 accepted as Nassarius denticulatus (A. Adams, 1852) accepted as Tritia denticulata (A. Adams, 1852) (unaccepted > nomen nudum)
76. Species Nassa reticulata (Linnaeus, 1758) accepted as Tritia reticulata (Linnaeus, 1758) (unaccepted > superseded combination)
77. Species Nassa rochebrunei Locard, 1887 accepted as Nassarius nitidus (Jeffreys, 1867) accepted as Tritia nitida (Jeffreys, 1867) (synonym)
78. Species Nassa rosacea Reeve, 1854 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
79. Species Nassa saxatilis Brusina, 1870 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
80. Species Nassa semicostata Locard, 1887 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (synonym)
81. Species Nassa semistriata (Brocchi, 1814) † accepted as Tritia semistriata (Brocchi, 1814) † (unaccepted > superseded combination)
82. Species Nassa senegalensis Maltzan, 1884 accepted as Nassarius senegalensis (Maltzan, 1884) accepted as Tritia senegalensis (Maltzan, 1884)
83. Species Nassa servaini Locard, 1887 accepted as Nassarius nitidus (Jeffreys, 1867) accepted as Tritia nitida (Jeffreys, 1867) (synonym)
84. Species Nassa sesarma Marrat, 1877 accepted as Nassarius sesarmus (Marrat, 1877) (original combination)
85. Species Nassa sparta Marrat, 1877 accepted as Nassarius corniculum (Olivi, 1792) accepted as Tritia corniculum (Olivi, 1792) (synonym)
86. Species Nassa subcostulata Locard, 1886 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (dubious synonym)
87. Species Nassa sulcifera A. Adams, 1852 accepted as Nassarius arcularia plicatus (Röding, 1798) (unaccepted > junior subjective synonym)
88. Species Nassa tenella Reeve, 1854 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
89. Species Nassa tingitana Pallary, 1901 accepted as Tritia tingitana (Pallary, 1901) (unaccepted > superseded combination)
90. Species Nassa trifasciata A. Adams, 1853 sensu Mc Andrew, 1857 accepted as Nassarius ovoideus (Locard, 1886) accepted as Tritia ovoidea (Locard, 1886) (misapplication)
91. Species Nassa tryoni Crosse, 1869 accepted as Demoulia tryoni (Crosse, 1869)
92. Species Nassa turgida (Bucquoy, Dautzenberg & Dollfus, 1882) accepted as Tritia cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814)
93. Species Nassa valliculata Locard, 1886 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (synonym)
94. Species Nassa vaucheri Pallary, 1906 accepted as Naytia vaucheri (Pallary, 1906) (unaccepted > superseded combination)
95. Species Nassa watsoni Kobelt, 1887 accepted as Nassarius conspersus (R. A. Philippi, 1849) accepted as Tritia conspersa (R. A. Philippi, 1849) (doubtful synonym)

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