Author: Bertelsen & Nielsen, 1987
Monognathus nigeli Bertelsen & Nielsen, 1987
Diagnosis: elongate, pointed snout. Jaws almost straight. Dorsal fin with 82-95 rays; its origin above myomeres nos. 10-16. Analfin with 56-60 rays; its origin two myomeres behind anus. Myomeres 107-116. Pectoral fins very short, less than 1 of standard length. Colour: five lateral, subdermal spots. Scattered pigmented areas on head and abdomen. Size: 55-57 mm.
Habitat: caught pelagically at depths between 1510 and 3910 meters, one specimen 23 meters above the bottom and the other two 1500-2000 meters above the bottom.Food: no data. Reproduction: no data.
Distribution: in the Northeast Atlantic.