1. Species Plagiostoma acutum T. R. Waller, 2005 †
2. Species Plagiostoma alticostum (Chapuis & Dewalque, 1852) †
3. Species Plagiostoma amoenum (Terquem, 1855) †
4. Species Plagiostoma aubersonensis (Pictet & Campiche, 1869) †
5. Species Plagiostoma dubisiensis (Pictet & Campiche, 1869) †
6. Species Plagiostoma gigantea J. Sowerby, 1814 †
7. Species Plagiostoma punctatum J. Sowerby, 1815 †
8. Species Plagiostoma scallanae McRoberts, 2017 †
9. Species Plagiostoma subvaloniense Krumbeck, 1923 †
10. Species Plagiostoma annulatus J. B. Trask, 1856 † accepted as Delectopecten pedroanus (J. B. Trask, 1856) † (subjective synonym)
11. Species Plagiostoma brightoniensis Mantell, 1822 † accepted as Spondylus spinosus (J. Sowerby, 1814) † (unaccepted > junior subjective synonym)
12. Species Plagiostoma concentrica J. De C. Sowerby, 1827 † accepted as Buchia concentrica (J. De C. Sowerby, 1827) † (unaccepted > superseded combination)
13. Species Plagiostoma dumosum S. G. Morton, 1834 † accepted as Spondylus dumosus (S. G. Morton, 1834) † (unaccepted > superseded combination)
14. Species Plagiostoma duplicata J. De C. Sowerby, 1827 † accepted as Pseudolimea duplicata (J. De C. Sowerby, 1827) † (unaccepted > superseded combination)
15. Species Plagiostoma grandis Hector, 1886 † accepted as Camptonectes grandis (Hector, 1886) †
16. Species Plagiostoma gregalis S. G. Morton, 1833 † accepted as Spondylus gregalis (S. G. Morton, 1833) † (unaccepted > superseded combination)
17. Species Plagiostoma pectinoides J. Sowerby, 1815 † accepted as Pseudolimea pectinoides (J. Sowerby, 1815) † (unaccepted > superseded combination)
18. Species Plagiostoma pedroana J. B. Trask, 1856 † accepted as Delectopecten pedroanus (J. B. Trask, 1856) † (unaccepted > superseded combination)
19. Species Plagiostoma punctata J. Sowerby, 1815 † accepted as Plagiostoma punctatum J. Sowerby, 1815 † (unaccepted > incorrect grammatical agreement of specific epithet)
20. Species Plagiostoma spinosa J. Sowerby, 1814 † accepted as Spondylus spinosus (J. Sowerby, 1814) † (unaccepted > superseded combination)
21. Species Plagiostoma truncata J. B. Trask, 1856 † accepted as Delectopecten pedroanus (J. B. Trask, 1856) † (subjective synonym)
22. Species Plagiostoma amdoense S.-X. Wen, 1979 † (uncertain > unassessed)
23. Species Plagiostoma cardiiformis J. Sowerby, 1815 † (uncertain > unassessed)
24. Species Plagiostoma elongata J. De C. Sowerby, 1827 † (uncertain > unassessed)
25. Species Plagiostoma hermanni Zieten, 1833 † (uncertain > unassessed)
26. Species Plagiostoma kunlunheense Y.-J. Lu, 1979 † (uncertain > unassessed)
27. Species Plagiostoma laeviusculum J. Sowerby, 1822 † (uncertain > unassessed)
28. Species Plagiostoma obscura J. Sowerby, 1815 † (uncertain > unassessed)
29. Species Plagiostoma ovalis J. Sowerby, 1815 † (uncertain > unassessed)
30. Species Plagiostoma ovata X.-M. Gan, 1978 † (uncertain > unassessed)
31. Species Plagiostoma pararegularum Chen & Y.-J. Lu, 1979 † (uncertain > unassessed)
32. Species Plagiostoma rigida J. Sowerby, 1815 † (uncertain > unassessed)
33. Species Plagiostoma rusticum J. Sowerby, 1822 † (uncertain > unassessed)
34. Species Plagiostoma sulcata Lamarck, 1819 † (uncertain > taxon inquirendum)
35. Species Plagiostoma ventricosum Zieten, 1833 † (uncertain > unassessed)

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