Author: Maul, 1972
Gnathophis codoniphorus Maul, 1972
Diagnosis: resembles G. mystax but has the anterior nostril opening as a bell-shaped tube, only 1-2 pores on the post-orbital branch of the infra-orbital canal, and 144 vertebrae.
Habitat: benthic on shelf at 300-490 m. Food: no data. Reproduction: no data.
Distribution: on the Azorean slope at 30° 03' N, 28° 40' W. Elsewhere, southward at 20° 50.2' N., 28° 23.8' W.
Eggs, larvae and young stages. No data.
Otoliths (sagitta). No data.
Note: Known only from one juvenile and two post-larvae. Probably synonym of Gnathophis mystax (Delaroche, 1800).