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CCDB → Pteridophytes → Thelypteridaceae → Sphaerostephanos → Sphaerostephanos subtruncatus Holttum
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Sphaerostephanos subtruncatus Holttum | Sphaerostephanos subtruncatus Holttum | 72 | IPCN online | Rajkumar, S. D. 2001. IOPB chromosome data 17. Newslett. Int. Organ. Pl. Biosyst. (Pruhonice) 33: 25–26. |