1. Species Maretia carinata Bolau, 1873
2. Species Maretia carolinensis Kier, 1997 †
3. Species Maretia cordata Mortensen, 1948
4. Species Maretia estenozi Sánchez Roig, 1926 †
5. Species Maretia planulata (Lamarck, 1816)
6. Species Maretia ranjitpurensis Jain, 2002 †
7. Species Maretia alta A. Agassiz, 1864 accepted as Nacospatangus altus (A. Agassiz, 1864) (transferred to Nacospatangus)
8. Species Maretia cordiformis accepted as Maretia cordata Mortensen, 1948 (unaccepted > nomen nudum, lapsus calamni)
9. Species Maretia elevata Döderlein, 1906 accepted as Hemimaretia elevata (Döderlein, 1906) (transferred to Hemimaretia)
10. Species Maretia elliptica Bolau, 1874 accepted as Platybrissus ellipticus (Bolau, 1874) (transferred to Platybrissus)
11. Species Maretia fasciata Lambert & Thiery, 1924 accepted as Maretia planulata (Lamarck, 1816) (subjective junior synonym)
12. Species Maretia ovata H.L. Clark, 1917 accepted as Maretia planulata (Lamarck, 1816) (subjective junior synonym)
13. Species Maretia pareti Manzoni, 1879 † accepted as Mazettia pareti (Manzoni, 1879) † (type-species of Mazettia)
14. Species Maretia parvituberculata H.L. Clark, 1925 accepted as Eurypatagus parvituberculatus (H.L. Clark, 1925) (transferred to Eurypatagus)
15. Species Maretia peloria H.L. Clark, 1916 accepted as Paramaretia peloria (H.L. Clark, 1916) (transferred to Paramaretia)
16. Species Maretia tuberculata A. Agassiz & H.L. Clark, 1907 accepted as Paramaretia tuberculata (A. Agassiz & H.L. Clark, 1907) (transferred to Paramaretia)

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