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)