Scheme and micrograph of the hepato-nephrocitic system of the control group.

(A) Noticed intact trophocyte (tr) and oenocyte (oe) in close association. (B) Pericardial cells (pc) forming a layer around the dorsal vessel (dv). (C) Detail of the cordonal pericardial cell in stage I, showing intracytoplasmatic vacuoles (arrow) and some eosinophil granules (gr). n = nucleus, l = lumen.