Achnanthidium minutissimum
- kingdom: Chromista
- phylum: Ochrophyta
- class: Bacillariophyceae
- order: Achnanthales
- family: Achnanthidiaceae
- genus: Achnanthidium
- species: Achnanthidium minutissimum
Lukov
Zlín
Czech RepublicSan Michele di Serino
Campania
ItalyRio Vista
California
United States