1. Species Plagioecia aliformis (Canu & Bassler, 1929) †
2. Species Plagioecia allaudi (Sauvage, 1888) †
3. Species Plagioecia ambigua Osburn, 1953
4. Species Plagioecia americana (Ulrich & Bassler, 1907) †
5. Species Plagioecia amplimaculata Taylor & McKinney, 2006 †
6. Species Plagioecia anacapensis Osburn, 1953
7. Species Plagioecia angustiora Walter, 1989 †
8. Species Plagioecia antanihodiensis Di Martino, Martha & Taylor, 2018 †
9. Species Plagioecia bibensis Braga & Bignot, 1986 †
10. Species Plagioecia botula Canu & Bassler, 1920 †
11. Species Plagioecia brundidgensis Canu & Bassler, 1920 †
12. Species Plagioecia bugei Winston, Vieira & Woollacott, 2014
13. Species Plagioecia carinata (Levinsen, 1925) †
14. Species Plagioecia clavioedes Canu & Bassler, 1920 †
15. Species Plagioecia clypeiformis (d'Orbigny, 1853) †
16. Species Plagioecia compressa (Goldfuss, 1826) †
17. Species Plagioecia concreta Canu & Bassler, 1920 †
18. Species Plagioecia congesta (d'Orbigny, 1852) †
19. Species Plagioecia corrugata (Harmelin, 1979)
20. Species Plagioecia cristata Taylor & McKinney, 2006 †
21. Species Plagioecia cyrenaica Annoscia, 1969 †
22. Species Plagioecia dilatata (d'Orbigny, 1850) †
23. Species Plagioecia disciformis (von Hagenow, 1839) †
24. Species Plagioecia discoidea Canu & Bassler, 1920 †
25. Species Plagioecia dispar Canu & Bassler, 1928
26. Species Plagioecia divagans Canu & Bassler, 1920 †
27. Species Plagioecia dorsalis (Waters, 1879)
28. Species Plagioecia echinata (Počta, 1892) †
29. Species Plagioecia eudesiana (Milne Edwards, 1836) †
30. Species Plagioecia excentrica (Canu, 1909) †
31. Species Plagioecia fistularis (von Hagenow, 1846) †
32. Species Plagioecia folia (Novak, 1877) †
33. Species Plagioecia foliacea (de Tribolet, 1872) †
34. Species Plagioecia formosa (Canu, 1922) †
35. Species Plagioecia globulosa Canu & Bassler, 1920 †
36. Species Plagioecia hirsuta (Walter, 1972) †
37. Species Plagioecia hirta Canu & Bassler, 1920 †
38. Species Plagioecia inoedificata (Jullien, 1882)
39. Species Plagioecia koinos Taylor & McKinney, 2006 †
40. Species Plagioecia kryptos Taylor & McKinney, 2006 †
41. Species Plagioecia lactea Calvet, 1903
42. Species Plagioecia lamellosa Canu & Bassler, 1920 †
43. Species Plagioecia lecointrei Buge, 1950 †
44. Species Plagioecia lobata Canu & Bassler, 1920 †
45. Species Plagioecia maculata Taylor & McKinney, 2006 †
46. Species Plagioecia madrasensis Guha & Nathan, 1996 †
47. Species Plagioecia major (Walford, 1894) †
48. Species Plagioecia marginata Canu & Bassler, 1920 †
49. Species Plagioecia meandrina (Canu & Bassler, 1930)
50. Species Plagioecia orbiculata (Goldfuss, 1826) †
51. Species Plagioecia orbifera (Canu & Bassler, 1926) †
52. Species Plagioecia parva Gordon & Taylor, 2010
53. Species Plagioecia parvipora (Canu & Bassler, 1929) non Canu, 1922 †
54. Species Plagioecia parvipora Canu, 1922 †
55. Species Plagioecia patina (Lamarck, 1816)
56. Species Plagioecia phlyctaenosa (Reuss, 1854) †
57. Species Plagioecia pilosa (Novak, 1877) †
58. Species Plagioecia platydiscus Harmelin, 1976
59. Species Plagioecia plicata (Canu, 1909) †
60. Species Plagioecia rajani Guha & Nathan, 1996 †
61. Species Plagioecia redonesiensis Canu & Lecointre, 1933 †
62. Species Plagioecia reticuloides Canu & Bassler, 1929
63. Species Plagioecia rhomboidea Walter, 1989 †
64. Species Plagioecia rotula (Reuss, 1848) †
65. Species Plagioecia sarniensis (Norman, 1864)
66. Species Plagioecia sarthacensis (Pergens, 1890) †
67. Species Plagioecia spissa (Gregory, 1899) †
68. Species Plagioecia stipata (Canu, 1917) †
69. Species Plagioecia striatula (Canu & Bassler, 1930)
70. Species Plagioecia subpapyracea (Canu & Bassler, 1930)
71. Species Plagioecia superposita Canu & Bassler, 1920 †
72. Species Plagioecia taylori Guha & Gopikrishna, 2007 †
73. Species Plagioecia tortuosa Osburn, 1953
74. Species Plagioecia tubiabortiva (Canu & Bassler, 1930)
75. Species Plagioecia tubifer Canu & Bassler, 1920 †
76. Species Plagioecia vancouverensis O'Donoghue & O'Donoghue, 1926
77. Species Plagioecia varians (Ulrich, 1901) †
78. Species Plagioecia zatoni Gordon & Taylor, 2015 †
79. Species Plagioecia subramosa (Ulrich, 1901) † accepted as Fascipora subramosa Ulrich, 1901 † accepted as Diaperoecia americana (Gabb & Horn, 1862) † (Alternative combination)
80. Species Plagioecia grimaldii (Jullien, 1903) (uncertain > taxon inquirendum)
81. Species Plagioecia reticularia Canu & Lecointre, 1933 † (uncertain > taxon inquirendum)

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