| Eothynnus Temporal range:  | |
|---|---|
| Scientific classification   | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Actinopterygii | 
| Order: | Carangiformes | 
| Suborder: | Carangoidei | 
| Family: | Carangidae | 
| Genus: | † Eothynnus Woodward, 1901 | 
| Species: | †E. salmoneus | 
| Binomial name | |
| †Eothynnus salmoneus Woodward, 1901 | |
Eothynnus is an extinct species of prehistoric jackfish that lived during the lower Eocene of Europe. It contains a single species, E. salmoneus from what is now the Isle of Sheppey (as a part of the London Clay Lagerstatten) in England. [1] [2] It is known exclusively from some preserved skulls. [3]
It was originally thought to be a tuna or mackerel, hence the generic name translating as "dawn" or "Eocene tuna." [2] Later, it was reappraised to be a jackfish, related to Teratichthys and Eastmanalepes (syn. " Caranx primaevus"). [4] [5]