Fig. 1. Selected stages and lineages of hermaphrodite germline and somatic gonad development. Schematic diagram depicting four stages of gonadogenesis (left) and a corresponding abbreviated lineage (right). Yellow indicates germline proliferation; green indicates meiotic development. Somatic gonad lineages are coded: red, DTC; dark blue, SS cells; cyan, differentiated sheath cells; gray, spermatheca; white, uterus (Kimble and Hirsh, 1979); broken lines indicate additional cell divisions. The germ line is largely syncytial; `germ cell' refers to each nucleus and surrounding cytoplasm.