| Type | probable PARATYPE |
| Catalogue # | OSUM 25191 |
| Type locality | NW corner of Peebles Ranch, two miles up Elk Creek from Newcastle, Colorado, [USA] |
| Collector(s) | ? Albert Dakan |
| Date collected | prior to 1915 |
| # Specimens | 1 dry |
| Description | Nautilus 27: 38 |
| Remarks | ex. W.F. Webb - "from the lot" |
| Current status | Oreohelix hendersoni dakani Henderson, 1915 |