Achnanthidium

Achnanthidium is a genus of diatoms belonging to the family Achnanthidiaceae.

The genus was described in 1844 by Friedrich Traugott Kützing.

The genus has cosmopolitan distribution.

Species: (see a more complete list)
 * Achnanthidium affine (Grunow) Czarnecki, 1994
 * Achnanthidium agardhii (Kützing) Mereschkowsky
 * Achnanthidium alpestre (R. Lowe & J.P. Kociolek) R. Lowe & J.P. Kociolek
 * Achnanthidium minutissimum (Kützing) Czarnecki