| Name | Biddulphia rhombus f. trigona Hustedt |
| Authorship | Hustedt |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Biddulphia rhombus (Ehrenberg) W.Smith |
| Remarks | Created from Taxon Name Import: Biddulphia rhombus f. trigona Hustedt |
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