Orygmaspis Plus Kendalina Trilobite Association

Here is an unusual and rarely offered Upper Cambrian trilobite, Orygmaspis contracta. It comes from the Upper Cambrian, McKay Group in Southern British Columbia. It's .66" long and right next to it, is a ventrally preserved Kendalina of an undescribed species. There is also a second partial Orygmaspis present on the plate.

Finding specimens of Orygmaspis with both cheeks and this nicely articulated is tough. It was painstakingly prepared using air abrasives under microscope, a task that was made extremely difficult due to it's tissue paper thin shell. Access to the collecting localities where these are found is fairly restricted and this is part of a small quantity of these trilobites I've been able to acquire from the claim holder.