Osteoglossiformes

**Osteoglosiforme** (**Osteoglossiformes**) aktinopterijioen klaseko izen bereko ordenako arrainez esaten da. Osteoglosiformen ordenako arrain gehienek bizkarraren aurreko aldea eta alboak hegalik gabeak dituzte. Bizkarraren eta sabelaren erditik atzera, berriz, isatsarekin elkartzen den hegala dute. *Xenomystus nigri* motak sabelean bakarrik du hegala, zakatzen paretik isatserainokoa. Ezagunenak aipatu dena, *Arapaima gigas* eta *Osteoglossum bicirrhosum* dira; adituen ustez azken horrek ahoan berotzen dituela arrautzak.

## Taxonomia 
Notopteroidei subordena
* Gymnarchidae familia
* Mormyridae familia
* Notopteridae familia
* Ostariostomidae familia (iraungitua)
Osteoglossoidei subordena
* Arapaimidae familia
* Osteoglossidae familia
* Pantodontidae familia
* Singidididae familia (iraungitua)

## Generoen sailkapena 
Hona hemen generoen bilakera:

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## Erreferentziak 
## Kanpo estekak