Microdictyon japonicum
- kingdom: Plantae
- phylum: Chlorophyta
- class: Ulvophyceae
- order: Cladophorales
- family: Anadyomenaceae
- genus: Microdictyon
- species: Microdictyon japonicum
Ashibetsu
Hokkaido
Japan
Hāna- Ka‘a‘awa
- Princeville
- Pūpūkea
Hawaii
United States