Fig. 2.

Richtersius coronifer s.s. (Richters, 1903) from the Billefjorden population, claws. a, b Claws III and IV seen under NCM. c, d Claws II and IV seen under SEM. e, f Lunules II and IV seen under SEM. Filled arrowheads indicate the laminar stalk connecting claw to the lunule, empty arrowheads indicate posterior lateral expansions. Scale bars in μm