Eothynnus
| Eothynnus Temporal range:
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|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Carangiformes |
| Suborder: | Carangoidei |
| Family: | Carangidae |
| Genus: | †Eothynnus Woodward, 1901 |
| Species: | †E. salmoneus
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| Binomial name | |
| †Eothynnus salmoneus Woodward, 1901
| |
Eothynnus is an extinct species of prehistoric jackfish that lived during the lower Eocene of Europe and eastern North America. It contains a single species, E. salmoneus. It is known primarily from some preserved skulls from what is now the Isle of Sheppey (as a part of the London Clay Lagerstatten) in England. A single vertebra is also known from the Nanjemoy Formation of Virginia, US.
It was originally thought to be a tuna or mackerel, hence the generic name translating as "dawn" or "Eocene tuna." Later, it was reappraised to be a jackfish, related to Teratichthys and Eastmanalepes (syn. "Caranx primaevus"). It is one of the largest fish known from the London Clay.