Distribution of species of the genus Bactrurus (Amphipoda, Crangonyctidae) in relation to karst. Karst areas are based on Weary and Doctor (2014). Letters A–F (red arrows) are localities discussed in the body of the text.

  Part of: Taylor SJ, Niemiller ML (2016) Biogeography and conservation assessment of Bactrurus groundwater amphipods (Crangonyctidae) in the central and eastern United States. Subterranean Biology 17: 1-29. https://doi.org/10.3897/subtbiol.17.7298