Stegostenopos cryptogenes is a species of bluntnose knifefish endemic to Brazil where it is found in the Rio Negro basin.

This species can reach a total length of up to 15 cm (5.9 in).

[1] It is the only member of the genus Stegostenopos according to FishBase,[2] but studies have shown that it belongs in Hypopygus (making Stegostenopos a junior synonym) and this is followed by the Catalog of Fishes.

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