Figure 10.

Charnia masoni from the Winter Coast of the White Sea, Russia. A–B, PIN 3993‐7023; rotated and furled third order branches evenly spaced at the base of a second order branch but oriented medially at the apex. C, PIN 3993‐7023; clean separations between second order branches, and variation in their width of separation, indicate that the second order branches were probably discrete units each with its own boundary wall (rather than a shared wall with adjacent second order branches). D–E, PIN 3993‐7025; furled, distally inflated fourth order branches (expanded in E) with no further subdivisions visible. Scale bars represent 10 mm.