Osteichthyes - Anguilliformes - Nemichthyidae
Parent taxon: Anguilliformes according to R. Betancur et al. 2013
See also Constantin 1999, Jordan 1963 and Nelson et al. 2016
Sister taxa: Abisaadia, Anguillavidae, Anguillidae, Anguilloidei, Anguilloididae, Bolcanguilla, Brannerion, Casierius, Chlopsoidei, Congermuraena, Congridae, Congroidea, Congroidei, Derrhiidae, Eodiaphyodus, Eomuraena, Eomyrophis, Eurypharyngidae, Gazolapodus, Hayenchelys, Hoplunnis, Japonoconger, Lemkea, Leptocephalus, Libanechelyidae, Luenchelys, Micromyrus, Milananguillidae, Moringuoidei, Muraenanguilla, Muraenesocidae, Muraenidae, Muraenoidei, Palaeomyrus, Paranguillidae, Patavichthyidae, Proserrivomer, Protanguilloidei, Proteomyridae, Rhynchocymba, Saccopharyngidae, Saccopharyngoidei, Synaphobranchoidei, Urenchelyidae, Enchelycephali, Mastygocercus, Carencheli, Lyomeri, Colocephali, Archencheli, Echelidae
Subtaxa: Oligonemichthys
Ecology: nektobenthic carnivore
Distribution: found only at Cozla (Piatra Neamt) (Oligocene of Romania)