| Referens | Dean, H.K., 2009 Polychaetes and echiurans. p. 181-192 Wehrtmann, I.S. and Cortés, J. 2009. Marine biodiversity of Costa Rica, Central America. Springer 538pp. |
| Ref. | 83919 Dean, H.K., 2009 |
| Sida | SPL 13.1 |
| Named Used as Valid | Parapionosyllis longicirrata |
| Observationsplats | |
| Distribution | Belize. |