1. Species Platyceras contortus (de Koninck, 1883) †
2. Species Platyceras decorum Talent & Philip, 1956 †
3. Species Platyceras inaequalis (de Koninck, 1883) †
4. Species Platyceras latum Keyes, 1888 †
5. Species Platyceras mansfieldense Tassell, 1977 †
6. Species Platyceras minutum Chapman, 1916 †
7. Species Platyceras nasutum S. A. Miller, 1891 †
8. Species Platyceras parasiticum (Trautschold, 1867) †
9. Species Platyceras sagum Mazaev, 2019 †
10. Species Platyceras trirotundolobatum Talent & Philip, 1956 †
11. Species Platyceras uncus (de Koninck, 1883) †
12. Species Platyceras vetusta (J. De C. Sowerby, 1829) †
13. Subgenus Platyceras (Orthonychia) J. Hall, 1843 † accepted as Orthonychia J. Hall, 1843 † (unaccepted > superseded rank)
    1. Species Platyceras (Orthonychia) enorme Lindström, 1884 † accepted as Orthonychia enorme (Lindström, 1884) † (unaccepted > superseded combination)
    2. Species Platyceras (Orthonychia) parvum (Swallow, 1858) † accepted as Orthonychia parva (Swallow, 1858) † (unaccepted > superseded combination)
14. Subgenus Platyceras (Platyceras) Conrad, 1840 † accepted as Platyceras Conrad, 1840 † (unaccepted > superseded rank)
    1. Species Platyceras (Platyceras) latum Keyes, 1888 † accepted as Platyceras latum Keyes, 1888 † (unaccepted > superseded combination)
    2. Species Platyceras (Platyceras) nasutum S. A. Miller, 1891 † accepted as Platyceras nasutum S. A. Miller, 1891 † (unaccepted > superseded combination)
    3. Species Platyceras (Platyceras) parasiticum (Trautschold, 1867) † accepted as Platyceras parasiticum (Trautschold, 1867) †
15. Subgenus Platyceras (Platyostoma) Conrad, 1842 † accepted as Platyostoma Conrad, 1842 † (unaccepted > superseded rank)
    1. Species Platyceras (Platyostoma) incisum (Chapman, 1916) † accepted as Platyostoma incisum (Chapman, 1916) †
16. Species Platyceras cornucapella Etheridge, 1896 † accepted as Rhabdocantha cornucapella (Etheridge, 1896) † (unaccepted > superseded combination, original combination)
17. Species Platyceras cylindricum (Talent & Philip, 1956) † accepted as Visitator cylindricus (Talent & Philip, 1956) † (unaccepted > superseded combination)
18. Species Platyceras depressum Ulrich & Scofield, 1897 † accepted as Helcionopsis depressum (Ulrich & Scofield, 1897) † (unaccepted > superseded combination)
19. Species Platyceras dumosum Conrad, 1840 † accepted as Spiniplatyceras dumosum (Conrad, 1840) † (original combination)
20. Species Platyceras enorme Lindström, 1884 † accepted as Orthonychia enorme (Lindström, 1884) † (unaccepted > superseded combination)
21. Species Platyceras subrectum J. Hall, 1859 † accepted as Orthonychia subrectum (J. Hall, 1859) † (unaccepted > superseded combination)
22. Species Platyceras vetulum Sardeson, 1896 † accepted as Cyrtonellopsis vetulum (Sardeson, 1896) † (unaccepted > superseded combination)
23. Species Platyceras vetustum (J. de C. Sowerby, 1829) † accepted as Platyceras vetusta (J. De C. Sowerby, 1829) † (unaccepted > incorrect grammatical agreement of specific epithet)
24. Species Platyceras wisconsinensis Ulrich & Scofield, 1897 † accepted as Helcionopsis wisconsinensis (Ulrich & Scofield, 1897) † (unaccepted > superseded combination)
25. Species Platyceras ausushanensis X.-D. Qiao, 1983 † (uncertain > unassessed)
26. Species Platyceras camurus X.-D. Qiao, 1983 † (uncertain > unassessed)
27. Species Platyceras etheridgei Tate, 1892 † (uncertain > unassessed)
28. Species Platyceras heishantouensis X.-D. Qiao, 1983 † (uncertain > unassessed)
29. Species Platyceras lodiense Meek, 1871 † (uncertain > unassessed)
30. Species Platyceras moriensis X.-D. Qiao, 1983 † (uncertain > unassessed)
31. Species Platyceras tamuganensis X.-D. Qiao, 1983 † (uncertain > unassessed)
32. Species Platyceras tortum Meek, 1871 † (uncertain > unassessed)

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