In the diagram I have assumed that a second species (I) has produced, by analogous steps, after ten thousand generations, either two well-marked varieties (w10 and z10) or two species, according to the amount of change supposed to be represented between the horizontal lines.
Diagraman jo dut bigarren espezie batek (I), antzeko urratsez, hamar mila belaunaldiren buruan, edo bi aldaki ongi markatu (w10 eta z10) edo bi espezie sortu dituela, lerro horizontalen artean irudikaturik jotzen den aldaketa kantitatearen arabera.