1. Species Palaeacmaea typica J. Hall & Whitfield, 1872 †
2. Species Palaeacmaea anticostiensis Twenhofel, 1928 † accepted as Vallatotheca anticostiensis (Twenhofel, 1928) † (unaccepted > superseded combination)
3. Species Palaeacmaea bella T.-G. He & X.-H. Yang, 1982 † accepted as Asiapatella undulata (W. Yu, 1981) † (a junior synonym)
4. Species Palaeacmaea compressa Koken, 1925 † accepted as Pygmaeoconus compressus (Koken, 1925) † (unaccepted > superseded combination)
5. Species Palaeacmaea hampakuensis Kobayashi, 1934 † accepted as Pygmaeoconus hampakuensis (Kobayashi, 1934) † (unaccepted > superseded combination)
6. Species Palaeacmaea humilis Ulrich & Scofield, 1897 † accepted as Floripatella humilis (Ulrich & Scofield, 1897) † (unaccepted > superseded combination)
7. Species Palaeacmaea immigrans Barrande, 1903 † accepted as Patelliconus primulus (Perner, 1903) † (unaccepted > junior subjective synonym)
8. Species Palaeacmaea incerta Barrande, 1903 † accepted as Siluracmaea incerta (Barrande, 1903) † (unaccepted > superseded combination)
9. Species Palaeacmaea irregularis Raymond, 1905 † accepted as Floripatella irregularis (Raymond, 1905) † (unaccepted > superseded combination)
10. Species Palaeacmaea irvingi Whitfield, 1878 † accepted as Proplina irvingi (Whitfield, 1878) † (unaccepted > superseded combination)
11. Species Palaeacmaea kettneri Říha, 1938 † accepted as Peelipilina latiuscula (Barrande, 1903) † (unaccepted > junior subjective synonym)
12. Species Palaeacmaea latiuscula Barrande, 1903 † accepted as Peelipilina latiuscula (Barrande, 1903) † (unaccepted > superseded combination)
13. Species Palaeacmaea orphyne (Billings, 1865) † accepted as Floripatella orphyne (Billings, 1865) † (unaccepted > superseded combination)
14. Species Palaeacmaea porrecta Barrande, 1903 † accepted as Pygmaeoconus porrectus (Barrande, 1903) † (unaccepted > superseded combination)
15. Species Palaeacmaea primula Barrande, 1903 † accepted as Patelliconus primulus (Perner, 1903) † (basionym)
16. Species Palaeacmaea quebecensis (Billings, 1865) † accepted as Floripatella quebecensis (Billings, 1865) † (unaccepted > superseded combination)
17. Species Palaeacmaea sohsanensis Kobayashi, 1934 † accepted as Pygmaeoconus sohsanensis (Kobayashi, 1934) † (unaccepted > superseded combination)
18. Species Palaeacmaea solarium Lindström, 1884 † accepted as Pilina solarium (Lindström, 1884) † (unaccepted > superseded combination)
19. Species Palaeacmaea acuta H.-Z. Pan, 1978 † (uncertain)
20. Species Palaeacmaea parahumilis H.-Z. Pan, 1978 † (uncertain)
21. Species Palaeacmaea youyangensis H.-Z. Pan, 1978 † (uncertain)

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