Fig. 8

Richtersius coronifer s.s. (Richters, 1903) from Billefjorden population, egg chorion morphology seen under SEM. a Entire egg. b, c Details of processes. d Details of surface. Arrowhead indicate divided process apices. Scale bars in μm
Richtersius coronifer s.s. (Richters, 1903) from Billefjorden population, egg chorion morphology seen under SEM. a Entire egg. b, c Details of processes. d Details of surface. Arrowhead indicate divided process apices. Scale bars in μm