1. Species Pentacheles gibbus Alcock, 1894
2. Species Pentacheles laevis Spence Bate, 1878
3. Species Pentacheles obscurus Spence Bate, 1878
4. Species Pentacheles snyderi (Rathbun, 1906)
5. Species Pentacheles validus A. Milne-Edwards, 1880
6. Species Pentacheles Agassizii A. Milne-Edwards, 1880 accepted as Polycheles typhlops Heller, 1862 (unaccepted > junior subjective synonym)
7. Species Pentacheles andamanensis Alcock, 1894 accepted as Stereomastis nana (Smith, 1884) (unaccepted > junior subjective synonym)
8. Species Pentacheles auriculatus Spence Bate, 1878 accepted as Stereomastis auriculata (Spence Bate, 1878) (unaccepted > superseded combination)
9. Species Pentacheles Beaumontii Alcock, 1894 accepted as Pentacheles laevis Spence Bate, 1878 (unaccepted > junior subjective synonym)
10. Species Pentacheles carpenteri Alcock, 1894 accepted as Pentacheles obscurus Spence Bate, 1878 (unaccepted > junior subjective synonym)
11. Species Pentacheles cerata Alcock, 1894 accepted as Stereomastis cerata (Alcock, 1894) (unaccepted > superseded combination)
12. Species Pentacheles debilis Smith, 1884 accepted as Pentacheles validus A. Milne-Edwards, 1880 (unaccepted > junior subjective synonym)
13. Species Pentacheles enthrix Spence Bate, 1878 accepted as Neopolycheles enthrix (Spence Bate, 1878) (unaccepted > superseded combination)
14. Species Pentacheles gibba Alcock, 1894 accepted as Pentacheles gibbus Alcock, 1894 (unaccepted > superseded combination)
15. Species Pentacheles gracilis Spence Bate, 1878 accepted as Pentacheles laevis Spence Bate, 1878 (unaccepted > junior subjective synonym)
16. Species Pentacheles Hextii Alcock, 1894 accepted as Polycheles typhlops Heller, 1862 (unaccepted > junior subjective synonym)
17. Species Pentacheles nanus Smith, 1884 accepted as Stereomastis nana (Smith, 1884) (unaccepted > superseded combination)
18. Species Pentacheles phosphorus Alcock, 1894 accepted as Stereomastis phosphorus (Alcock, 1894) (unaccepted > superseded combination)
19. Species Pentacheles spinosus A. Milne-Edwards, 1880 accepted as Polycheles sculptus Smith, 1880 accepted as Stereomastis sculpta (Smith, 1880) (unaccepted > junior subjective synonym)
20. Species Pentacheles Suhmi Spence Bate, 1878 accepted as Stereomastis suhmi (Spence Bate, 1878) (unaccepted > superseded combination)
21. Species Pentacheles trispinosus De Man, 1905 accepted as Stereomastis trispinosa (De Man, 1905) (unaccepted > superseded combination)

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