| Name | Thamnostylum Arx & H. P. Upadhyay |
| Authorship | Arx & H. P. Upadhyay |
| Rank | Genus |
| NomenclaturalStatus | NomLeg |
| Placed in | Syncephalastraceae |
| Contains | Thamnostylum sp. |
| Remarks | Type species: T. piriforme (Bainier) Arx & H. P. Upadhyay (Helicostylum piriforme Bainier, Bull. Soc. bot. Fr. 27: 227. 1880) |
| Citation | 1970 Gen. Fungi Sporul. Cult. 247 |