1. Species Modiomorpha aksuensis Z.-R. Yang, 1983 †
2. Species Modiomorpha altiforme Walcott, 1884 †
3. Species Modiomorpha arcuata J. Hall, 1883 †
4. Species Modiomorpha concentrica (Conrad, 1838) †
5. Species Modiomorpha harrisae Pojeta, R.-J. Zhang & Z.-Y. Yang, 1986 †
6. Species Modiomorpha hobarksarensis Z.-R. Yang, 1981 †
7. Species Modiomorpha kalpinensis Z.-R. Yang, 1981 †
8. Species Modiomorpha mytiloides (Conrad, 1841) †
9. Species Modiomorpha oblonga R.-J. Zhang, 1977 † (accepted > unreplaced junior homonym, junior homonym of Modiomorpha oblonga Walcott, 1884)
10. Species Modiomorpha oblonga Walcott, 1884 †
11. Species Modiomorpha obtusa Walcott, 1884 †
12. Species Modiomorpha paradoxa (R.-J. Zhang, 1977) †
13. Species Modiomorpha subalata (Conrad, 1841) †
14. Species Modiomorpha subangulata J. Hall, 1885 †
15. Species Modiomorpha toliensis Z.-R. Yang, 1983 †
16. Species Modiomorpha wutubulakensis Z.-R. Yang, 1983 †
17. Species Modiomorpha macilenta J. Hall & Whitfield, 1869 † accepted as Modiomorpha mytiloides (Conrad, 1841) † (unaccepted > junior subjective synonym, tentative junior subjective synonym)
18. Species Modiomorpha neglecta J. Hall, 1883 † accepted as Ptychodesma neglectum (J. Hall, 1883) † (unaccepted > superseded combination)
19. Species Modiomorpha planulata J. Hall & Whitfield, 1869 † accepted as Modiomorpha mytiloides (Conrad, 1841) † (unaccepted > junior subjective synonym)
20. Species Modiomorpha tioga J. Hall, 1885 † accepted as Modiomorpha mytiloides (Conrad, 1841) † (unaccepted > junior subjective synonym, tentative junior subjective synonym)
21. Species Modiomorpha anulifera Spriestersbach, 1915 † (uncertain > unassessed)
22. Species Modiomorpha beushauseni Spriestersbach, 1909 † (uncertain > unassessed)
23. Species Modiomorpha brevis Mansuy, 1913 † (uncertain > unassessed)
24. Species Modiomorpha complanata J. Hall & Whitfield, 1869 † (uncertain > unassessed)
25. Species Modiomorpha cymbula J. Hall & Whitfield, 1869 † (uncertain > unassessed)
26. Species Modiomorpha duponti Mansuy, 1912 † (uncertain > unassessed)
27. Species Modiomorpha helmenreicheni J. M. Clarke, 1899 † (uncertain > unassessed)
28. Species Modiomorpha hyalea J. Hall & Whitfield, 1869 † (uncertain > unassessed)
29. Species Modiomorpha lavali Mansuy, 1912 † (uncertain > unassessed)
30. Species Modiomorpha missouriensis E. B. Branson, 1923 † (uncertain > taxon inquirendum)
31. Species Modiomorpha quadrula J. Hall & Whitfield, 1869 † (uncertain > taxon inquirendum)
32. Species Modiomorpha recta J. Hall, 1885 † (uncertain > unassessed)
33. Species Modiomorpha recurva J. Hall, 1883 † (uncertain > taxon inquirendum)
34. Species Modiomorpha rhomboidalis Spriestersbach, 1909 † (uncertain > unassessed)
35. Species Modiomorpha rigida J. Hall, 1883 † (uncertain > taxon inquirendum)
36. Species Modiomorpha rigidula G. B. Simpson, 1890 † (uncertain > taxon inquirendum)
37. Species Modiomorpha sellowi J. M. Clarke, 1899 † (uncertain > unassessed)
38. Species Modiomorpha subrhomboidea G. B. Simpson, 1890 † (uncertain > unassessed)

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