Figure 22. three peaks forked median ridge new subtype. 22.1.1 and 22.2.1. Upper crown (SEM) images showing arrangement of ridges, anterior mesial protrusion, and dentate posterior margin; GSC 124551 and 124552; scale bar = 0.5 mm. 22.2.2 and 22.3.1. Subcrown and subpedicle views (SEM images); GSC 124552 and 124553; scale bar = 0.5 mm and 0.2 mm. 22.4.1. and 22.5.1. Transmitted light images; GSC 124554 and 124555, scale bar = 0.4 mm.