MaleSpicFIG 10: Spicule morphogenesis.

A. Diagram of spicule development, lateral view, medial left. Bε = B.a(l/r)ap. (dsr) Dorsal retractor muscle; (SPso) spicule socket cell. (Based on Sulston et al., 1980; Baird and Eliazar, 1999.)
B. Transverse view of boxed region in A. Bε(l).apa is not visible in this section.
C. Nomarksi DIC image of the spicule trace.