Figure 1 in Mitochondrial genetic variation within and between Holbrookia lacerata lacerata and Holbrookia lacerata subcaudalis, the spot-tailed earless lizards of Texas

Figure 1. Sampling map of the focal taxa (Holbrookia lacerata lacerata and H. l. subcaudalis) and outgroup taxa (H. maculata and H. propinqua). The sampling ranges for the nominal taxa are representative of their current distributions. The historical distribution of H. lacerata is represented by the dotted line, while the Balcones Fault/Escarpment, the natural biogeographic barrier between the two subspecies, is represented by the solid black line.