| Ioscion Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Division: | Teleostei |
| Order: | Acanthuriformes |
| Family: | Sciaenidae |
| Genus: | †Ioscion Jordan, 1921 |
| Species: | †I. morgani |
| Binomial name | |
| †Ioscion morgani Jordan, 1921 | |
Ioscion morgani is an extinct prehistoric marine ray-finned fish that lived during the Upper Miocene subepoch of what is now the Tortonian-aged Monterey Formation of Southern California. It is primarily known from incomplete fossils, such as the holotype, which consists of a broken backbone. The morphology of the head is unknown.
It was described by David Starr Jordan, who suggested that enough of the animal's anatomy suggests a relationship with the jackfishes of Carangidae. It was moved to its own family, Ioscionidae, by David (1943). However, a 2009 study refuted this placement and found it to be a drumfish based on its anatomy and fin placement.
