| Name | Achnanthidium Kützing |
| Authorship | Kützing |
| Rank | Genus |
| Placed in | Achnanthidiaceae D. G. Mann |
| Contains | Achnanthidium coarctatum Brébisson ex W. Smith Achnanthidium jackii Rabenhorst Achnanthidium lanceolatum Brébisson ex Kützing Achnanthidium sp. |
| Remarks | Lectotype: A. microcephalum Kützing (vide Rabenhorst, Süssw.-Diat. Freunde Mikr. 25, 46. 1853) |
| Citation | 1844 [7-9 Nov 1844] Kieselschal. Bacill. 75 |