| Citation | Steiner, G. and A.R. Kabat, 2004 Catalog of species-group names of recent and fossil Scaphopoda (Mollusca). Zoosystema 26(4):549-726. |
| Ref. | 1821 Steiner, G. and A.R. Kabat, 2004 |
| Page | 636 |
| Named Used as Valid | Polyschides quadrifissatus |
| Locality | San Pedro, San Diego, California. |
| Distribution | Eastern Pacific: California. |