| Nominal Species (n = 26) | Present allocation (n = 6) | Ref. |
|---|---|---|
| Rhynchoceratias acanthirostris Parr, 1927 | Melanocetus murrayi | 4491 |
| Xenoceratias braueri Koefoed, 1944 | Melanocetus johnsonii | 4491 |
| Xenoceratias brevirostris Regan & Trewavas, 1932 | Melanocetus johnsonii | 4491 |
| Melanocetus cirrifer Regan & Trewavas, 1932 | Melanocetus johnsonii | 4491 |
| Melanocetus eustalus Pietsch & Van Duzer, 1980 | Melanocetus eustalus | 46206 |
| Melanocetus ferox Regan, 1926 | Melanocetus johnsonii | 4491 |
| Xenoceratias heterorhynchus Regan & Trewavas, 1932 | Melanocetus johnsonii | 4491 |
| Melanocetus johnsoni (non Günther, 1864) | Melanocetus murrayi | 4491 |
| Melanocetus johnsonii Günther, 1864 | Melanocetus johnsonii | 40877 |
| Melanocetus krechi Brauer, 1902 | Melanocetus johnsonii | 4491 |
| Xenoceratias laevis Regan & Trewavas, 1932 | Melanocetus johnsonii | 4491 |
| Rhynchoceratias latirhinus Parr, 1927 | Melanocetus murrayi | 4491 |
| Rhynchoceratis latirhinus Parr, 1927 | Melanocetus murrayi | 56787 |
| Rhynchoceratias longipinnis Parr, 1930 | Melanocetus murrayi | 4491 |
| Melanocetus megalodontis Beebe & Crane, 1947 | Melanocetus johnsonii | 4491 |
| Xenoceratias micracanthus Regan & Trewavas, 1932 | Melanocetus johnsonii | 4491 |
| Melanocetus murrayi Günther, 1887 | Melanocetus murrayi | 4491 |
| Melanocetus niger (non Regan, 1925) | Melanocetus murrayi | 4491 |
| Melanocetus niger Regan, 1925 | Melanocetus niger | 9068 |
| Melanocetus polyactis Regan, 1925 | Melanocetus polyactis | 86949 |
| Xenoceratias regani Koefoed, 1944 | Melanocetus murrayi | 4491 |
| Melanocetus rossi Balushkin & Fedorov, 1981 | Melanocetus rossi | 5187 |
| Melanocetus rotundatus Gilchrist, 1903 | Melanocetus johnsonii | 4118 |
| Centrocetus spinulosus Regan & Trewavas, 1932 | Melanocetus johnsonii | 4491 |
| Melanocetus tumidus Parr, 1927 | Melanocetus murrayi | 4491 |
| Melanocetus vorax Brauer, 1902 | Melanocetus murrayi | 4491 |