| Name | Guyanagaster T. W. Henkel, Aime & M. E. Smith |
| Authorship | T. W. Henkel, Aime & M. E. Smith |
| Rank | Genus |
| Placed in | Physalacriaceae Corner |
| Contains | Guyanagaster necrorhizus T. W. Henkel, Aime & M. E. Smith Guyanagaster sp. |
| Remarks | Type species: G. necrorhiza T. W. Henkel, Aime & M. E. Smith |
| Citation | 2010 Amer. J. Bot. 97(9): 1477 |