Macrosemius
| Macrosemius Temporal range: | |
|---|---|
| Macrosemius rostratus fossil | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Clade: | Ginglymodi |
| Order: | †Semionotiformes |
| Family: | †Macrosemiidae |
| Genus: | †Macrosemius Agassiz, 1834 |
Macrosemius is an extinct genus of macrosemiid fish known from the Late Jurassic of Germany.