| Citation | George, R.Y., 2004 Deep-sea asellote isopods (Crustacea, Eumalacostraca) of the north-west Atlantic: the family Haploniscidae. Journal of Natural History 38:337-373. |
| Ref. | 8102 George, R.Y., 2004 |
| Page | 367 |
| Named Used as Valid | Mastigoniscus gratus |
| Locality | |
| Distribution | Southeast Pacific. |