Fig. 3.

Patterns of foot process arrangement in nephrocytes. (a–c) Three patterns of foot process arrangement are recognized in nephrocytes. The washboard-like (WB) pattern is found in Fruit fly (Drosophila melanogaster) (a). In decapods, foot processes are arranged in an interdigitating pattern (b, c). In hermit and mitten crabs, foot processes from the same cell are interdigitated among them, i.e., autocellular interdigitating (ACI) pattern (b). In crayfish, lobster, and prawn, foot processes are interdigitated with those of adjacent cells, i.e., intercellular interdigitating (ICI) pattern (c). (d–f, h–j) Basal surface of 3D reconstructed nephrocytes in decapods. Individual nephrocytes are painted in different colors (purple and green). Foot process arrangement is clearly visible on the basal surface of 3D reconstructed nephrocytes. (g) Basal surface of 3D reconstructed podocytes in rat. Foot processes are arranged in an ICI pattern. Scale bars, 500 nm