Hiodontiformes

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Osteichthyes
Classis: Actinopterygii
Subclassis: Neopterygii
Infraclassis: Teleostei
Superordo: Osteoglossomorpha
Ordo: Hiodontiformes
Familia: Hiodontidae

Vernacular name
Internationalization
日本語: ヒオドン目

References

* FishBase link : ordo Osteoglossiformes (Mirror site)

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Hiodontiformes is a relatively new order of fish, consisting of the two living species of the mooneye family Hiodontidae and three genera of extinct types.

These are traditionally classified with the Osteoglossiformes, and many authorities still do, but fossil study of the extinct Yanbiania suggest that the hiodontids separated from other osteoglossiforms early, and thus belong to a separate order.