1. Species Rhizosolenia acicularis B.G.Sundström, 1986
2. Species Rhizosolenia acuminata (H.Peragallo) H.Peragallo, 1907
3. Species Rhizosolenia antennata (Ehrenberg) N.E.Brown, 1920
4. Species Rhizosolenia bergonii H.Peragallo, 1892
5. Species Rhizosolenia borealis B.G.Sundström, 1986
6. Species Rhizosolenia calcar-avis Schultze, 1858
7. Species Rhizosolenia castracanei H.Peragallo, 1888
8. Species Rhizosolenia curvata Zacharias, 1905
9. Species Rhizosolenia decipiens B.G.Sundström, 1986
10. Species Rhizosolenia fallax B.G.Sundström, 1986
11. Species Rhizosolenia formosa H.Peragallo, 1888
12. Species Rhizosolenia fragillima H.H.Gran
13. Species Rhizosolenia hebatata
14. Species Rhizosolenia hebetata Bailey, 1856
15. Species Rhizosolenia imbricata Brightwell, 1858
16. Species Rhizosolenia ostenfeldii B.G.Sundström, 1986
17. Species Rhizosolenia phuketensis B.G.Sundström, 1980
18. Section Rhizosolenia Pseudosetigera Medlin in Medlin et al., 2021
19. Species Rhizosolenia simplex Karsten, 1905
20. Species Rhizosolenia styliformis T.Brightwell, 1858
21. Species Rhizosolenia temperei H.Peragallo, 1888
22. Species Rhizosolenia alata Brightwell, 1858 accepted as Proboscia alata (Brightwell) Sundström, 1986 (synonym)
23. Species Rhizosolenia antennula accepted as Rhizosolenia antennata (Ehrenberg) N.E.Brown, 1920 (spelling variation)
24. Species Rhizosolenia eriensis H.L.Smith, 1872 accepted as Urosolenia eriensis (H.L.Smith) Round & R.M.Crawford, 1990 accepted as Rhizosolenia eriensis f. eriensis H.L. Smith, 1872 (basionym)
25. Species Rhizosolenia fragilissima Bergon, 1903 accepted as Dactyliosolen fragilissimus (Bergon) Hasle, 1996 accepted as Rhizosolenia fragilissima f. fragilissima Bergon, 1903
26. Species Rhizosolenia pungens Cleve-Euler, 1937 represented as Sundstroemia pungens (Cl.-Euler) Medlin, Lundholm, Boonprakob, Moestrup in Medlin et al., 2021
27. Species Rhizosolenia setigera Brightwell, 1858 represented as Sundstroemia setigera (Brightwell) Medlin in Medlin et al., 2021
28. Species Rhizosolenia similoides Cleve-Euler, 1951 represented as Sundstroemia similoides (Cl.-Euler) Medlin, Lundholm, Boonprakob & Moestrup in Medlin et al., 2021
29. Species Rhizosolenia americana Ehrenberg, 1843 (uncertain > unassessed)
30. Species Rhizosolenia arafurensis Castracane, 1886 (uncertain > unassessed)
31. Species Rhizosolenia bidens Karsten, 1905 (uncertain > unassessed)
32. Species Rhizosolenia calcar avis Schultze, 1858 (uncertain > unassessed)
33. Species Rhizosolenia castracanei Cleve, 1889 (uncertain > unassessed)
34. Species Rhizosolenia chunii Karsten, 1905 (uncertain > unassessed)
35. Species Rhizosolenia crassa Schimper, 1905 (uncertain > unassessed)
36. Species Rhizosolenia curva Karsten, 1905 (uncertain > unassessed)
37. Species Rhizosolenia curvirostris Jousé, 1968 (uncertain > unassessed)
38. Species Rhizosolenia cylindrus Cleve, 1897 (uncertain > unassessed)
39. Species Rhizosolenia delicatula Cleve, 1900 (uncertain > unassessed)
40. Species Rhizosolenia faeroensis Ostenfeld, 1903 (uncertain > unassessed)
41. Species Rhizosolenia flaccida Castracane, 1886 (uncertain > unassessed)
42. Species Rhizosolenia gracillima Cleve, 1881 (uncertain > unassessed)
43. Species Rhizosolenia hensenii Schütt, 1900 (uncertain > unassessed)
44. Species Rhizosolenia hyalina Ostenfeld, 1901 (uncertain > unassessed)
45. Species Rhizosolenia indica H.Peragallo, 1892 (uncertain > unassessed)
46. Species Rhizosolenia inermis F.Castracane, 1886 (uncertain > unassessed)
47. Species Rhizosolenia japonica Castracane, 1886 (uncertain > unassessed)
48. Species Rhizosolenia minima Levander, 1904 (uncertain > unassessed)
49. Species Rhizosolenia murrayana Castracane, 1886 (uncertain > unassessed)
50. Species Rhizosolenia obtusa Hensen, 1887 (uncertain > unassessed)
51. Species Rhizosolenia pellucida Cleve, 1901 (uncertain > unassessed)
52. Species Rhizosolenia polydactyla Castracane, 1886 (uncertain > unassessed)
53. Species Rhizosolenia praebergonii V.V.Muchina, 1965 (uncertain > unassessed)
54. Species Rhizosolenia rhombus Karsten, 1905 (uncertain > unassessed)
55. Species Rhizosolenia robusta G.Norman ex Ralfs, 1861 (uncertain > unassessed)
56. Species Rhizosolenia semispina Hensen, 1887 (uncertain > unassessed)
57. Species Rhizosolenia shrubsolei Cleve, 1881 (uncertain > unassessed)
58. Species Rhizosolenia sima Castracane, 1886 (uncertain > unassessed)
59. Species Rhizosolenia similis Cleve, 1937 (uncertain > unassessed)
60. Species Rhizosolenia stolterfothii H.Peragallo, 1888 (uncertain > unassessed)
61. Species Rhizosolenia striata Greville, 1864 (uncertain > unassessed)
62. Species Rhizosolenia tenuijuncta Manguin, 1960 (uncertain > unassessed)
63. Species Rhizosolenia torpedo Karsten, 1905 (uncertain > unassessed)
64. Species Rhizosolenia truncata G.Karsten, 1905 (uncertain > unassessed)
65. Species Rhizosolenia tubiformis G.R.Hasle, 1975 (uncertain > unassessed)

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