| Type | PARATYPE |
| Catalogue # | OSUM 18118 |
| Type locality | Susquehanna River at Selingrove, Snyder Co., Pennsylvania, [USA] |
| Collector(s) | A.E. Ortmann |
| Date collected | 14 Aug. 1910 |
| # Specimens | 1 dry |
| Description | Memoirs of the Carnegie Museum 8: 187 |
| Remarks | |
| Current status | Alasmidonta marginata Say, 1818 |