Figure 6. A comparison of sutures; 1. Hoplitoides sandovalensis USNM 420145 #1 and USNM 420145 #2 suture pattern tested against each other for comparison. The area of difference is 6.62 units. This result confirms that variations in how a suture pattern is captured are not an important source of error; 2. Coilopoceras springeri holotype right and left opposing suture template. The polygon was edited so the overlaps did not show as differences. The area of difference is10.48 units; 3. Coilopoceras springeri holotype right suture compared with Coilopoceras springeri paratype USNM 420161. The area of difference is 14.45 units; 4. Coilopoceras springeri USNM 420159 compared with Coilopoceras colleti USNM 278092, two different species within the genus Coilopoceras. The area of difference is 21.87 units; 5. A suture pattern comparison between two genera, using Coilopoceras springeri USNM 275907 and Hoplitoides sandovalensis USNM 420145. The area of difference is 32.08.