Echelus
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Echelus is a genus of eels in the snake-eel family Ophichthidae. Fossils belonging to this genus date back to the Early Eocene.
Species
There are currently 4 recognized species in this genus:
- Echelus myrus (Linnaeus, 1758) (Painted eel)
- Echelus pachyrhynchus (Vaillant, 1888)
- Echelus polyspondylus J. E. McCosker & H. C. Ho, 2015 (Many-vertebrae snake eel)
- Echelus uropterus (Temminck & Schlegel, 1846) (Finned snake eel)

The following fossil species are also known:
- †Echelus arcuatus Radwanska, 1984 - Middle Miocene of Poland [otolith]
- †Echelus branchialis (Woodward, 1901) - Early Eocene of England
- †Echelus contractus Stinton, 1975 - Middle Eocene of England [otolith]
- †Echelus dolloi (Storms, 1896) - Middle Eocene of Belgium (=Eomyrus)