Hypothetical line of ascent of haemoproteid parasites of bats. The oblique doted line separates species with schizonts in the reticuloendothelial system (RES) on the right and the species with schizonts in hepatocytes (HEP) on the left. The green line (low left) encircles parasites with gametocytes of the “malariae” type, the blue line (low right) gametocytes of the “falciparum” type and the red line (top) gametocytes of the “vivax” type