''Neidium'' is a genus of
diatom
A diatom (Neo-Latin ''diatoma''), "a cutting through, a severance", from el, διάτομος, diátomos, "cut in half, divided equally" from el, διατέμνω, diatémno, "to cut in twain". is any member of a large group comprising sev ...
s belonging to the family
Neidiaceae.
The genus has
cosmopolitan distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The ext ...
.
Species:
*''
Neidium acutum''
*''
Neidium affine''
*''
Neidium agonaense''
References
{{Taxonbar, from=Q21476780
Naviculales
Diatom genera