1. Species Euchaeta acuta Giesbrecht, 1893
2. Species Euchaeta concinna Dana, 1849-1852
3. Species Euchaeta indica Wolfenden, 1906
4. Species Euchaeta longicornis Giesbrecht, 1888
5. Species Euchaeta magniloba Park, 1978
6. Species Euchaeta marina (Prestandrea, 1833)
7. Species Euchaeta marinella Bradford, 1974
8. Species Euchaeta media Giesbrecht, 1888
9. Species Euchaeta paraacuta Tanaka, 1973
10. Species Euchaeta paraconcinna Fleminger, 1957
11. Species Euchaeta plana Mori, 1937
12. Species Euchaeta pubera Sars G.O., 1907
13. Species Euchaeta rimana Bradford, 1974
14. Species Euchaeta spinosa Giesbrecht, 1893
15. Species Euchaeta tenuis Esterly, 1906
16. Species Euchaeta wrighti Park, 1968
17. Species Euchaeta abbreviata Park, 1978 accepted as Paraeuchaeta abbreviata (Park, 1978)
18. Species Euchaeta aequatorialis (Tanaka, 1958) accepted as Paraeuchaeta aequatorialis Tanaka, 1958
19. Species Euchaeta affinis Cleve, 1904 accepted as Paraeuchaeta affinis (Cleve, 1904)
20. Species Euchaeta alaminae Park, 1975 accepted as Paraeuchaeta alaminae (Park, 1975)
21. Species Euchaeta antarctica Giesbrecht, 1902 accepted as Paraeuchaeta antarctica (Giesbrecht, 1902)
22. Species Euchaeta armata Boeck, 1873 accepted as Chiridius armatus (Boeck, 1873) accepted as Aetideopsis armatus (Boeck, 1873) accepted as Aetideopsis armata (Boeck, 1873)
23. Species Euchaeta atlantica Lubbock, 1856 accepted as Euchaeta marina (Prestandrea, 1833)
24. Species Euchaeta australis Brady, 1883 accepted as Undeuchaeta plumosa (Lubbock, 1856)
25. Species Euchaeta austrina Giesbrecht, 1902 accepted as Paraeuchaeta austrina (Giesbrecht, 1902)
26. Species Euchaeta barbata Brady, 1883 accepted as Paraeuchaeta barbata (Brady, 1883) accepted as Paraeuchaeta barbata barbata (Brady, 1883) (Basionym)
27. Species Euchaeta biconvexa Park, 1978 accepted as Paraeuchaeta biconvexa (Park, 1978) accepted as Paraeuchaeta tumidula (Sars G.O., 1905)
28. Species Euchaeta biloba (Farran, 1929) accepted as Paraeuchaeta biloba Farran, 1929
29. Species Euchaeta birostrata (Brodsky, 1950) accepted as Paraeuchaeta birostrata Brodsky, 1950
30. Species Euchaeta bisinuata Sars G.O., 1907 accepted as Paraeuchaeta bisinuata (Sars G.O., 1907) (Basionym)
31. Species Euchaeta bradyi With, 1915 accepted as Paraeuchaeta bradyi (With, 1915) (Basionym)
32. Species Euchaeta californica Esterly, 1906 accepted as Paraeuchaeta californica (Esterly, 1906)
33. Species Euchaeta calva (Tanaka, 1958) accepted as Paraeuchaeta calva Tanaka, 1958
34. Species Euchaeta carinata Möbius, 1874 accepted as Euchaeta norvegica Boeck, 1873 accepted as Paraeuchaeta norvegica (Boeck, 1873)
35. Species Euchaeta communis Dana, 1849-1852 accepted as Euchaeta marina (Prestandrea, 1833)
36. Species Euchaeta comosa (Tanaka, 1958) accepted as Paraeuchaeta comosa Tanaka, 1958
37. Species Euchaeta confusa (Tanaka, 1958) accepted as Paraeuchaeta confusa Tanaka, 1958
38. Species Euchaeta consimilis Farran, 1936 accepted as Euchaeta concinna Dana, 1849-1852 (synonym according to Grice, 1962)
39. Species Euchaeta dactylifera Park, 1978 accepted as Paraeuchaeta dactylifera (Park, 1978)
40. Species Euchaeta daitomarui Mori, 1937 accepted as Paraeuchaeta russelli (Farran, 1936)
41. Species Euchaeta diadema Dana, 1849-1852 accepted as Paraeuchaeta diadema (Dana, 1849-1852)
42. Species Euchaeta diegensis Esterly, 1911 accepted as Paraeuchaeta diegensis (Esterly, 1911) accepted as Paraeuchaeta media (Giesbrecht, 1888) accepted as Euchaeta media Giesbrecht, 1888
43. Species Euchaeta dubia Esterly, 1906 accepted as Paraeuchaeta californica (Esterly, 1906)
44. Species Euchaeta elongata Esterly, 1913 accepted as Paraeuchaeta elongata (Esterly, 1913)
45. Species Euchaeta eltaninae Park, 1978 accepted as Paraeuchaeta eltaninae (Park, 1978)
46. Species Euchaeta eminens (Tanaka & Omori, 1968) accepted as Paraeuchaeta eminens Tanaka & Omori, 1968
47. Species Euchaeta erebi (Farran, 1929) accepted as Paraeuchaeta erebi Farran, 1929
48. Species Euchaeta exigua Wolfenden, 1911 accepted as Paraeuchaeta exigua (Wolfenden, 1911)
49. Species Euchaeta farrani With, 1915 accepted as Paraeuchaeta farrani (With, 1915) accepted as Paraeuchaeta barbata (Brady, 1883) accepted as Paraeuchaeta barbata barbata (Brady, 1883)
50. Species Euchaeta flava Giesbrecht, 1888 accepted as Paraeuchaeta flava (Giesbrecht, 1888)
51. Species Euchaeta gigas Brady, 1883 accepted as Valdiviella gigas (Brady, 1883) accepted as Valdiviella insignis Farran, 1908
52. Species Euchaeta glacialis Hansen, 1886 accepted as Paraeuchaeta glacialis (Hansen, 1886) (basionym)
53. Species Euchaeta gladiofera Gaudy, 1963 accepted as Paraeuchaeta gladiofera (Gaudy, 1963) accepted as Paraeuchaeta paraconcinna (Fleminger, 1957) accepted as Euchaeta paraconcinna Fleminger, 1957
54. Species Euchaeta gracilicauda (Scott A., 1909) accepted as Paraeuchaeta gracilicauda Scott A., 1909
55. Species Euchaeta gracilis Sars G.O., 1905 accepted as Paraeuchaeta gracilis (Sars G.O., 1905) (Basionym)
56. Species Euchaeta grandiremis Giesbrecht, 1888 accepted as Paraeuchaeta grandiremis (Giesbrecht, 1888)
57. Species Euchaeta hanseni With, 1915 accepted as Paraeuchaeta hansenii (With, 1915) (Basionym)
58. Species Euchaeta hansenii With, 1915 accepted as Paraeuchaeta hansenii (With, 1915)
59. Species Euchaeta haswelli (Brady, 1918) accepted as Paraeuchaeta haswelli (Brady, 1918)
60. Species Euchaeta hebes Giesbrecht, 1888 accepted as Paraeuchaeta hebes (Giesbrecht, 1888) (basionym)
61. Species Euchaeta hessei Brady, 1883 accepted as Euchirella rostrata (Claus, 1866)
62. Species Euchaeta incisa Sars G.O., 1905 accepted as Paraeuchaeta incisa (Sars G.O., 1905) (Basionym)
63. Species Euchaeta investigatoris (Sewell, 1929) accepted as Paraeuchaeta investigatoris Sewell, 1929
64. Species Euchaeta japonica Marukawa, 1921 accepted as Paraeuchaeta elongata (Esterly, 1913)
65. Species Euchaeta longissima Park, 1978 accepted as Paraeuchaeta longissima (Park, 1978) accepted as Paraeuchaeta kurilensis Heptner, 1971
66. Species Euchaeta malayensis (Sewell, 1929) accepted as Paraeuchaeta malayensis Sewell, 1929
67. Species Euchaeta murrayi Sewell, 1947 accepted as Paraeuchaeta plana (Mori, 1937) accepted as Euchaeta plana Mori, 1937 (synonym according to Tanaka & Omori, 1968)
68. Species Euchaeta norvegica Boeck, 1873 accepted as Paraeuchaeta norvegica (Boeck, 1873) (basionym)
69. Species Euchaeta oceana Thompson I.C., 1903 accepted as Paraeuchaeta oceana (Thompson I.C., 1903)
70. Species Euchaeta ovata Sato, 1913 accepted as Paraeuchaeta ovata (Sato, 1913)
71. Species Euchaeta paracuta Tanaka, 1973 accepted as Euchaeta paraacuta Tanaka, 1973 (mis-spelling)
72. Species Euchaeta parvula Park, 1978 accepted as Paraeuchaeta parvula (Park, 1978)
73. Species Euchaeta philippii Brady, 1883 accepted as Paraeuchaeta philippii (Brady, 1883)
74. Species Euchaeta polaris (Brodsky, 1950) accepted as Paraeuchaeta polaris Brodsky, 1950
75. Species Euchaeta polita (Tanaka & Omori, 1968) accepted as Paraeuchaeta polita Tanaka & Omori, 1968 accepted as Paraeuchaeta calva Tanaka, 1958
76. Species Euchaeta porrecta Sars G.O., 1905 accepted as Paraeuchaeta barbata (Brady, 1883) accepted as Paraeuchaeta barbata barbata (Brady, 1883)
77. Species Euchaeta prestandreae Philippi, 1843 accepted as Euchaeta marina (Prestandrea, 1833)
78. Species Euchaeta propinqua Esterly, 1906 accepted as Paraeuchaeta propinqua (Esterly, 1906)
79. Species Euchaeta prudens (Tanaka & Omori, 1968) accepted as Paraeuchaeta prudens Tanaka & Omori, 1968
80. Species Euchaeta pseudotonsa Fontaine, 1967 accepted as Paraeuchaeta pseudotonsa (Fontaine, 1967) (basionym)
81. Species Euchaeta pseudotumidula (Brodsky, 1950) accepted as Paraeuchaeta pseudotumidula Brodsky, 1950 accepted as Paraeuchaeta tumidula (Sars G.O., 1905)
82. Species Euchaeta pubescens Dana, 1849-1852 accepted as Paraeuchaeta pubescens (Dana, 1849-1852)
83. Species Euchaeta pulchra Brady, 1883 accepted as Undeuchaeta plumosa (Lubbock, 1856)
84. Species Euchaeta quadrata Farran, 1908 accepted as Paraeuchaeta gracilis (Sars G.O., 1905)
85. Species Euchaeta rasa (Farran, 1929) accepted as Paraeuchaeta rasa Farran, 1929
86. Species Euchaeta regalis Grice & Hulsemann, 1968 accepted as Paraeuchaeta regalis (Grice & Hulsemann, 1968)
87. Species Euchaeta robusta Wolfenden, 1911 accepted as Paraeuchaeta robusta (Wolfenden, 1911)
88. Species Euchaeta rubicunda Farran, 1908 accepted as Paraeuchaeta rubicunda (Farran, 1908)
89. Species Euchaeta rubra (Brodsky, 1950) accepted as Paraeuchaeta rubra Brodsky, 1950
90. Species Euchaeta russelli Farran, 1936 accepted as Paraeuchaeta russelli (Farran, 1936)
91. Species Euchaeta sarsi Farran, 1908 accepted as Paraeuchaeta sarsi (Farran, 1908) (basionym)
92. Species Euchaeta scaphula Fontaine, 1967 accepted as Paraeuchaeta tuberculata Scott A., 1909
93. Species Euchaeta scotti Farran, 1908 accepted as Paraeuchaeta scotti (Farran, 1908) (basionym)
94. Species Euchaeta similis Wolfenden, 1908 accepted as Paraeuchaeta similis (Wolfenden, 1908)
95. Species Euchaeta simulantis (Tanaka & Omori, 1968) accepted as Paraeuchaeta simulantis Tanaka & Omori, 1968 accepted as Paraeuchaeta calva Tanaka, 1958
96. Species Euchaeta solida Esterly, 1911 accepted as Euchaeta tenuis Esterly, 1906
97. Species Euchaeta spinifera Esterly, 1906 accepted as Paraeuchaeta spinifera (Esterly, 1906) accepted as Paraeuchaeta tonsa (Giesbrecht, 1895)
98. Species Euchaeta sutherlandii Lubbock, 1856 accepted as Paraeuchaeta sutherlandii (Lubbock, 1856)
99. Species Euchaeta tonsa Giesbrecht, 1895 accepted as Paraeuchaeta tonsa (Giesbrecht, 1895)
100. Species Euchaeta trunculosa Pesta, 1909 accepted as Paraeuchaeta trunculosa (Pesta, 1909)
101. Species Euchaeta tuberculata (Scott A., 1909) accepted as Paraeuchaeta tuberculata Scott A., 1909
102. Species Euchaeta tumidula Sars G.O., 1905 accepted as Paraeuchaeta tumidula (Sars G.O., 1905)
103. Species Euchaeta tycodesma Park, 1978 accepted as Paraeuchaeta tycodesma (Park, 1978)
104. Species Euchaeta vervoorti Park, 1978 accepted as Paraeuchaeta vervoorti (Park, 1978)
105. Species Euchaeta vorax Grice & Hulsemann, 1968 accepted as Paraeuchaeta vorax (Grice & Hulsemann, 1968)
106. Species Euchaeta weberi (Scott A., 1909) accepted as Paraeuchaeta weberi Scott A., 1909
107. Species Euchaeta wilsoni Jespersen, 1934 accepted as Paraeuchaeta wilsoni (Jespersen, 1934)
108. Species Euchaeta withi (Sewell, 1947) accepted as Paraeuchaeta withi Sewell, 1947 accepted as Paraeuchaeta hansenii (With, 1915)
109. Species Euchaeta wolfendeni Scott A., 1909 accepted as Euchaeta indica Wolfenden, 1906
110. Species Euchaeta arabica Sciacchitano, 1931 (uncertain > taxon inquirendum)

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