| Trích dẫn | Cutler, E.B., 1994 The Sipuncula. Their systematics, biology and evolution. Ithaca: Comstock publishing Associates, 433 p. |
| Tài liệu tham khảo | 1840 Cutler, E.B., 1994 |
| Trang | 122 |
| Named Used as Valid | Phascolion cryptum |
| Địa phương | |
| Distribution | Southeastern USA. |