Distribution of sites (A-H) within the Río Concepción from which Poeciliopsis jackschultzi has been collected since 1981 (see Table 4). Type locality indicated by yellow star. Grey box in left inset figure indicates area presented in main figure. Right inset shows close up of area highlighted by white box. Extent of the Alisos Aquifer (also known as Rio Alisos Aquifer) is highlighted by a white line. The waste water treatment facility (PTAR Los Alisos) is indicated by a red polygon. The large commercial facility just north of the type locality is currently a Ganfer tomato greenhouse complex.