Neidium

{{Short description|Genus of diatoms}}

{{Automatic taxobox

|image = Hamilton et al 2019 Neidium iridis 2.jpg

|image_caption = Neidium iridis

|taxon = Neidium

|authority = E.Pfitzer, 1871

}}

Neidium is a genus of diatoms belonging to the family Neidiaceae.{{cite web |title=Neidium E.Pfitzer, 1871 |url=https://www.gbif.org/species/8069006 |website=www.gbif.org |access-date=3 May 2021 |language=en}}

The genus has cosmopolitan distribution.

Species:

• Neidium acutum {{small|Z.Levkov & S.Krstic, 2007}}
• Neidium affine {{small|(Ehrenberg) Pfizer, 1871}}
• Neidium agonaense {{small|Foged, 1966}}