1. Species Amphioplus (Amphioplus) abditus (Verrill, 1871)
2. Species Amphioplus (Amphioplus) aciculatus Mortensen, 1936
3. Species Amphioplus (Amphioplus) ancistrotus Clark, 1911
4. Species Amphioplus (Amphioplus) basilicus (Koehler, 1907)
5. Species Amphioplus (Amphioplus) brasiliensis Tommasi, 1970
6. Species Amphioplus (Amphioplus) debilis (Koehler, 1904)
7. Species Amphioplus (Amphioplus) didymus Clark, 1938
8. Species Amphioplus (Amphioplus) firma (Koehler, 1904)
9. Species Amphioplus (Amphioplus) guangdongensis Liao, 2004
10. Species Amphioplus (Amphioplus) hendleri Liao, 2004
11. Species Amphioplus (Amphioplus) hexabrachiatus Stöhr, 2003
12. Species Amphioplus (Amphioplus) intermedius (Koehler, 1905)
13. Species Amphioplus (Amphioplus) lobata (Ljungman, 1867)
14. Species Amphioplus (Amphioplus) lucidus Koehler, 1922
15. Species Amphioplus (Amphioplus) macilentus (Verrill, 1882)
16. Species Amphioplus (Amphioplus) macraspis (H.L. Clark, 1911)
17. Species Amphioplus (Amphioplus) magellanicus (Mortensen, 1936)
18. Species Amphioplus (Amphioplus) parviclypeus H.L. Clark, 1915
19. Species Amphioplus (Amphioplus) parvitus Cherbonnier & Guille, 1978
20. Species Amphioplus (Amphioplus) pectinatus Mortensen, 1933
21. Species Amphioplus (Amphioplus) personatus (Koehler, 1905)
22. Species Amphioplus (Amphioplus) psilochora (H.L. Clark, 1911)
23. Species Amphioplus (Amphioplus) qingdaoensis Liao, 2004
24. Species Amphioplus (Amphioplus) rhadinobrachius Clark, 1911
25. Species Amphioplus (Amphioplus) sepultus Hendler, 1995
26. Species Amphioplus (Amphioplus) sinicus Liao, 2004
27. Species Amphioplus (Amphioplus) spinosus Cherbonnier & Guille, 1978
28. Species Amphioplus (Amphioplus) stenaspis H.L. Clark, 1938
29. Species Amphioplus (Amphioplus) stewartensis (Mortensen, 1924)
30. Species Amphioplus (Amphioplus) strongyloplax (H.L. Clark, 1911)
31. Species Amphioplus (Amphioplus) tessellata (Koehler, 1904)
32. Species Amphioplus (Amphioplus) thomassini Cherbonnier & Guille, 1978
33. Species Amphioplus (Amphioplus) titubantius Cherbonnier & Guille, 1978
34. Species Amphioplus (Amphioplus) ctenacantha Baker, 1977 accepted as Amphiura ctenacantha (Baker, 1977) (unaccepted > superseded combination, transferred by O'Hara & Thuy, 2022)
35. Species Amphioplus (Amphioplus) furcatus Mortensen, 1933 accepted as Amphioplus (Lymanella) furcatus Mortensen, 1933 (transferred to subgenus Lymanella)
36. Species Amphioplus (Amphioplus) impressa (Ljungman, 1867) accepted as Amphioplus (Amphichilus) impressus (Ljungman, 1867) (transferred to subgenus Amphichilus by Liao & Clark (1995))
37. Species Amphioplus (Amphioplus) impressus (Ljungman, 1867) accepted as Amphioplus (Amphichilus) impressus (Ljungman, 1867) (transferred to subgenus Amphichilus by Liao & Clark (1995))
38. Species Amphioplus (Amphioplus) longirima Fell, 1952 accepted as Amphiura latisquama Mortensen, 1924 (synonymized by Mills & O'Hara (2013))
39. Species Amphioplus (Amphioplus) magnificus (Koehler, 1907) accepted as Silax magnificus (Koehler, 1907) (transferred to Silax by Stöhr % O'Hara (2021))
40. Species Amphioplus (Amphioplus) cyrtacanthus H.L. Clark, 1915 represented as Amphioplus cyrtacanthus H.L. Clark, 1915

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