Figure 1From: Spatial mosaic evolution of snail defensive traitsCollecting sites of Mexipyrgus churinceanus from spring-fed habitats in the Cuatro Ciénegas valley located in the center of the Chihuahuan desert of northeastern Mexico. These pools and streams are arrayed around the Sierra de San Marcos that bisects the center of the valley. Population numbers are shown on the map and referred to in Table 1.Back to article page