| Citation | Rice, M.E., 2009 Sipuncula of the Gulf of Mexico. pp. 803-807 In Felder, D.L.; Camp, D.K. (eds.) Gulf of Mexico - Origins, Waters, and Biota. Biodiversity. Texas A&M University Press, College Station, Texas. |
| Ref. | 116123 Rice, M.E., 2009 |
| Page | 807 |
| Named Used as Valid | Phascolosoma nigrescens |
| Locality | |
| Distribution | Gulf of Mexico. |