1. Species Pinnixa aequipunctata Morris & Collins, 1991 †
2. Species Pinnixa bahamondei Garth, 1957
3. Species Pinnixa balanoglossana Sakai, 1934
4. Species Pinnixa banzu Komai, Nishi & Taru, 2014
5. Species Pinnixa barnharti Rathbun, 1918
6. Species Pinnixa chiloensis Garth, 1957
7. Species Pinnixa cylindrica (Say, 1818)
8. Species Pinnixa darwini Garth, 1960
9. Species Pinnixa eburna Wells, 1928
10. Species Pinnixa forficulimanus Zmarzly, 1992
11. Species Pinnixa fusca Glassell, 1935
12. Species Pinnixa galliheri Rathbun, 1932 †
13. Species Pinnixa gracilipes Coelho, 1997
14. Species Pinnixa hendrickxi Salgado-Barragán, 2015
15. Species Pinnixa hiatus Rathbun, 1918
16. Species Pinnixa huffmani Glassell, 1935
17. Species Pinnixa lata Komatsu & Takeda, 2009
18. Species Pinnixa latissima Coelho, 1997
19. Species Pinnixa longipes (Lockington, 1877)
20. Species Pinnixa lunzi Glassell, 1937
21. Species Pinnixa microgranulosa Collins, Lee & Noad, 2003 †
22. Species Pinnixa minuscula Zmarzly, 1992
23. Species Pinnixa minuta Rathbun, 1901
24. Species Pinnixa miocenica (Rathbun, 1932) †
25. Species Pinnixa montereyensis Rathbun, 1932 †
26. Species Pinnixa navidadensis Feldmann, Schweitzer & Encinas, 2005 †
27. Species Pinnixa omega Morris & Collins, 1991 †
28. Species Pinnixa paitensis Rathbun, 1935
29. Species Pinnixa pembertoni Glassell, 1935
30. Species Pinnixa penultipedalis Stimpson, 1858
31. Species Pinnixa plectrophoros Glassell, 1935
32. Species Pinnixa rathbuni Sakai, 1934
33. Species Pinnixa richardsoni Glassell, 1936
34. Species Pinnixa scamit Martin & Zmarzly, 1994
35. Species Pinnixa tomentosa Lockington, 1877
36. Species Pinnixa tumida Stimpson, 1858
37. Species Pinnixa valdiviensis Rathbun, 1907
38. Species Pinnixa weymouthi Rathbun, 1918
39. Subgenus Pinnixa (Palaeopinnixa) Vía Boada, 1966 † accepted as Palaeopinnixa Vía Boada, 1966 †
    1. Species Pinnixa (Palaeopinnixa) mytilicola Vía Boada, 1966 † accepted as Palaeopinnixa mytilicola Vía Boada, 1966 † (unaccepted > superseded combination)
    2. Species Pinnixa (Palaeopinnixa) nodosa Collins & Rasmussen, 1992 † accepted as Viapinnixa nodosa (Collins & Rasmussen, 1992) † (unaccepted > superseded combination)
    3. Species Pinnixa (Palaeopinnixa) perornata Collins & Morris, 1976 † accepted as Palaeopinnixa perornata (Collins & Morris, 1976) † (unaccepted > superseded combination)
40. Species Pinnixa abbotti Glassell, 1935 accepted as Glassella abbotti (Glassell, 1935) (unaccepted > superseded combination)
41. Species Pinnixa affinis Rathbun, 1898 accepted as Rathbunixa affinis (Rathbun, 1918) (unaccepted > superseded combination)
42. Species Pinnixa aidae Righi, 1967 accepted as Austinixa aidae (Righi, 1967) (unaccepted > superseded combination)
43. Species Pinnixa angeloi Righi, 1967 accepted as Austinixa patagoniensis (Rathbun, 1918) (unaccepted > junior subjective synonym)
44. Species Pinnixa arenicola Rathbun, 1922 accepted as Glassella arenicola (Rathbun, 1922) (unaccepted > superseded combination)
45. Species Pinnixa behreae Manning & Felder, 1989 accepted as Austinixa behreae (Manning & Felder, 1989) (unaccepted > superseded combination)
46. Species Pinnixa brevipes H. Milne Edwards, 1853 accepted as Gandoa brevipes (H. Milne Edwards, 1853) (unaccepted > superseded combination)
47. Species Pinnixa brevipollex Rathbun, 1898 accepted as Tubicolixa brevipollex (Rathbun, 1898) (unaccepted > superseded combination)
48. Species Pinnixa californiensis Rathbun, 1894 accepted as Rathbunixa californiensis (Rathbun, 1894) (unaccepted > superseded combination)
49. Species Pinnixa chacei Wass, 1955 accepted as Austinixa chacei (Wass, 1955) (unaccepted > superseded combination)
50. Species Pinnixa chaetopterana Stimpson, 1860 accepted as Tubicolixa chaetopterana (Stimpson, 1860) (unaccepted > superseded combination)
51. Species Pinnixa costaricana Wicksten, 1982 accepted as Glassella costaricana (Wicksten, 1982) (unaccepted > superseded combination)
52. Species Pinnixa cristata Rathbun, 1900 accepted as Austinixa cristata (Rathbun, 1900) (unaccepted > superseded combination)
53. Species Pinnixa eocenica Rathbun, 1926 † accepted as Palaeopinnixa rathbunae Schweitzer, Feldmann, Tucker & Berglund, 2000 † (unaccepted > junior homonym)
54. Species Pinnixa faba (Dana, 1851) accepted as Scleroplax faba (Dana, 1851) (unaccepted > superseded combination)
55. Species Pinnixa faxoni Rathbun, 1918 accepted as Glassella faxoni (Rathbun, 1918) (unaccepted > superseded combination)
56. Species Pinnixa felipensis Glassell, 1935 accepted as Austinixa felipensis (Glassell, 1935) (unaccepted > superseded combination)
57. Species Pinnixa fischerii (A. Milne-Edwards, 1867) accepted as Tetrias fischerii (A. Milne-Edwards, 1867) (unaccepted > superseded combination)
58. Species Pinnixa floridana Rathbun, 1918 accepted as Glassella floridana (Rathbun, 1918) (unaccepted > superseded combination)
59. Species Pinnixa franciscana Rathbun, 1918 accepted as Scleroplax franciscana (Rathbun, 1918) (unaccepted > superseded combination)
60. Species Pinnixa gorei Manning & Felder, 1989 accepted as Austinixa gorei (Manning & Felder, 1989) (unaccepted > superseded combination)
61. Species Pinnixa haematosticta Sakai, 1934 accepted as Indopinnixa haematosticta (Sakai, 1934) (unaccepted > superseded combination)
62. Species Pinnixa heckeri Birshtein, 1956 † accepted as Palaeopinnixa heckeri (Birshtein, 1956) † (unaccepted > superseded combination)
63. Species Pinnixa laevigata Stimpson, 1859 accepted as Pinnixa cylindrica (Say, 1818) (unaccepted > junior subjective synonym)
64. Species Pinnixa leptodactyla Coelho, 1997 accepted as Austinixa leptodactyla (Coelho, 1997) (unaccepted > superseded combination)
65. Species Pinnixa leptosynaptae Wass, 1968 accepted as Glassella leptosynaptae (Wass, 1968) (unaccepted > superseded combination)
66. Species Pinnixa littoralis Holmes, 1895 accepted as Scleroplax littoralis (Holmes, 1895) (unaccepted > superseded combination)
67. Species Pinnixa monodactyla (Say, 1818) accepted as Sayixa monodactyla (Say, 1818) (unaccepted > superseded combination)
68. Species Pinnixa nitida Lockington, 1877 accepted as Parapinnixa nitida (Lockington, 1877) (unaccepted > superseded combination)
69. Species Pinnixa occidentalis Rathbun, 1894 accepted as Rathbunixa occidentalis (Rathbun, 1894) (unaccepted > superseded combination)
70. Species Pinnixa panamensis Faxon, 1893 accepted as Pinnixa transversalis (H. Milne Edwards & Lucas, 1842) accepted as Austinixa transversalis (H. Milne Edwards & Lucas, 1842) (unaccepted > junior subjective synonym)
71. Species Pinnixa patagoniensis Rathbun, 1918 accepted as Austinixa patagoniensis (Rathbun, 1918) (unaccepted > superseded combination)
72. Species Pinnixa pearsei Wass, 1955 accepted as Rathbunixa pearsei (Wass, 1955) (unaccepted > superseded combination)
73. Species Pinnixa petersi Bott, 1955 accepted as Pinnixulala petersi (Bott, 1955) (unaccepted > superseded combination)
74. Species Pinnixa rapax Bouvier, 1917 accepted as Tubicolixa rapax (Bouvier, 1917) (unaccepted > superseded combination)
75. Species Pinnixa rectinens Rathbun, 1918 accepted as Pinnixulala retinens (Rathbun, 1918) (unaccepted > misspelling - incorrect subsequent spelling)
76. Species Pinnixa retinens Rathbun, 1918 accepted as Pinnixulala retinens (Rathbun, 1918) (unaccepted > superseded combination)
77. Species Pinnixa salvadorensis Bott, 1955 accepted as Austinixa felipensis (Glassell, 1935) (unaccepted > junior subjective synonym)
78. Species Pinnixa sayana Stimpson, 1860 accepted as Rathbunixa sayana (Stimpson, 1860) (unaccepted > superseded combination)
79. Species Pinnixa schmitti Rathbun, 1918 accepted as Scleroplax schmitti (Rathbun, 1918) (unaccepted > superseded combination)
80. Species Pinnixa transversalis (H. Milne Edwards & Lucas, 1842) accepted as Austinixa transversalis (H. Milne Edwards & Lucas, 1842) (unaccepted > superseded combination)
81. Species Pinnixa tubicola Holmes, 1895 accepted as Scleroplax tubicola (Holmes, 1895) (unaccepted > superseded combination)
82. Species Pinnixa valerii Rathbun, 1931 accepted as Pinnixulala valerii (Rathbun, 1931) (unaccepted > superseded combination)
83. Species Pinnixa vanderhorsti Rathbun, 1922 accepted as Glassella vanderhorsti (Rathbun, 1922) (unaccepted > superseded combination)

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