| Authors(s) | Guglielmo, L. and G. Costanzo |
| Year | 1983 |
| Title | Diagnostic value of the thelycum in euphausiids. II. Oceanic species. Genera Bentheuphausia, Nyctiphanes, Pseudeuphausia, Tessarabrachion, and Nematobrachion. Journal of Crustacean Biology 3: 278-292. |