Hiodontiformes

Hiodontiformes 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.

Taxonomy

 * Order Hiodontiformes McAllister 1968 sensu Taverne 1979
 * Genus †Chetungichthys Chang & Chou 1977
 * †Chetungichthys brevicephalus Chang & Chou 1977
 * †Chetungichthys dalinghensis Su 1991
 * Genus †Yanbiania Li 1987
 * †Yanbiania wangqingica Li 1987
 * Genus †Plesiolycoptera Zhang & Zhou 1976
 * †Plesiolycoptera daqingensis Zhang & Zhou 1976
 * †Plesiolycoptera parvus ( (Sytchevskaya, 1986) (syn Eohiodon (Gobihiodon) parvus Sytchevskaya, 1986 )
 * Family Hiodontidae (mooneyes) Valenciennes 1846 sensu stricto
 * Genus Hiodon Lesueur 1818 [(syn: Amphiodon Rafinesque 1819 non Huber 1909 ; Hiodon (Amphiodon) (Rafinesque 1819) ; Hiodon (Clodalus) Rafinesque 1820 ; Clodalus (Rafinesque 1820) ; Hiodon (Elattonistius) Gill & Jordan ex Jordan 1877 ; Elattonistius (Gill & Jordan ex Jordan 1877) ; Glossodon Rafinesque 1818 non Heckel 1843 ; Eohiodon Cavender 1966 )
 * Hiodon alosoides (goldeye) (Rafinesque 1819)
 * †Hiodon consteniorum Li & Wilson 1994
 * †Hiodon falcatus (Grande, 1979) (syn Eohiodon falcatus (Grande, 1979) )
 * †Hiodon rosei (Hussakof 1916) (syn Eohiodon rosei (Hussakof 1916) ; Leucisus rosei Hussakof, 1916 )
 * Hiodon tergisus (mooneye) Lesueur 1818
 * †Hiodon woodruffi Wilson, 1978
 * †Hiodon shuyangensis Shen 1989 (nom dubium, possibly an immature Phareodus)