Hiodontiformes
| Hiodontiformes | |
|---|---|
| Hiodon tergisus | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Cohort: | Osteoglossomorpha |
| Order: | Hiodontiformes Taverne, 1979 |
| Type species | |
| Hiodon tergisus (Lesueur, 1818) | |
| Families | |
|
Hiodontidae (mooneyes) | |
Hiodontiformes /haɪəˈdɒntɪfɔːrmiːz/ is an order of ray-finned fish consisting of the two living species of the mooneye family, Hiodontidae, and three extinct genera.
These are traditionally classified within the order Osteoglossiformes, a placement some authorities still follow. Fossil study of the extinct genus Yanbiania suggests that the hiodontids separated from other osteoglossomorphs early and thus may deserve a separate order.