• Sanderson, Terrell Co., TX. Photo © Brad Alexander.
  • E of Sanderson, Terrell Co., TX. Photo © Michael S. Price.

  • N of Sanderson, Terrell Co., TX. Photo © Michael S. Price.

  • W of Sanderson, Terrell Co., TX. Photo © Michael S. Price.
  • W of Sanderson, Terrell Co., TX. Photo © Michael S. Price.

  • Sanderson, Terrell Co., TX. Collected by J. Fraser. Photo © Troy D. Hibbitts.
  • Juvenile female, N of Sanderson, Terrell Co., TX, August 1991. Photo © Troy D. Hibbitts.
  • Juvenile male, N of Sanderson, Terrell Co., TX, June 2006. Photo © Troy D. Hibbitts.

  • E of Sanderson, Terrell Co., TX. Collected by B. Ross, 1995. Photo © Troy D. Hibbitts.

  • E of Sanderson, Terrell Co., TX. Collected by B. Ross, 1995. Photo © Troy D. Hibbitts.
  • E of Sanderson, Terrell Co., TX. Collected by B. Ross, 1995. Photo © Troy D. Hibbitts.

  • E of Sanderson, Terrell Co., TX. Collected by D. Salceies, 1995. Photo © Troy D. Hibbitts.

  • DOR alterna, E of Sanderson, Terrell Co., TX, 1995. Photo © Troy D. Hibbitts.

  • E of Sanderson, Terrell Co., TX. Collected by J. Fraser, 1995. Photo © Troy D. Hibbitts.
  • E of Sanderson, Terrell Co., TX, June 1994. Photo © Troy D. Hibbitts.

  • N of Sanderson, Terrell Co., TX. Collected by Kuenn, 1997. Photo © Troy D. Hibbitts.

  • N of Sanderson, Terrell Co., TX. Collected by Miller Talbot, 1995. Photo © Troy D. Hibbitts.
  • W of Sanderson, Terrell Co., TX. Collected by B. Fraser, 1995. Photo © Troy D. Hibbitts.

  • W of Sanderson, Terrell Co., TX. Collected by B. Ross, 1995. Photo © Troy D. Hibbitts.

  • W of Sanderson, Terrell Co., TX. Collected by Holbrook, 1999. Photo © Troy D. Hibbitts.
  • Yearling female, W of Sanderson, Terrell Co., TX. July 1993. Photo © Troy D. Hibbitts.
  • Adult male, W of Sanderson, Terrell Co., TX. June 1994. Photo © Troy D. Hibbitts.
  • Subadult male, W of Sanderson, Terrell Co., TX. June 1995. Photo © Troy D. Hibbitts.

  • Adult female, W of Sanderson, Terrell Co., TX. June 1995. Photo © Troy D. Hibbitts.

  • E of Sanderson, Terrell Co., CB male 2001. Photo © Gerold Merker.

  • Female, Palma Draw, Terrell Co., TX. Photo © Gerold Merker.

  • Female, E of Sanderson, Terrell Co., TX. Photo © Gerold Merker.
  • Female, E of Sanderson, Terrell Co., TX. Photo © Gerold Merker.
  • E of Sanderson, Terrell Co., TX. Collected and photographed by J. Fraser, July 1991. Photo courtesy of G. T. Salmon.

  • E of Sanderson, Terrell Co., TX. Collected and photographed by J. Fraser, June 1991. Photo courtesy of G. T. Salmon.
  • E of Sanderson, Terrell Co., TX. Collected by J. Hollister, 1991. Photo courtesy of G. T. Salmon.
  • Sanderson, Terrell Co., TX. Collected by D. Doherty, August 1991. Photo by Dan Johnson, courtesy of G. T. Salmon.
  • Male, Sanderson, Terrell Co., TX. Photo © Gerold Merker.

  • Sanderson, Terrell Co., TX. Collected by Troy Hibbitts, August 1991. Photo courtesy of G. T. Salmon.

  • CB female, E of Sanderson, Terrell Co., TX. Photo © Gerold Merker.
  • Wild-caught adult, Hwy 285 N of Sanderson, Pecos Co., TX. G. Swinford, 20 July 2012. Photo © Gary Swinford.
  • Female alterna found 12 miles W of Sanderson, Terrell Co., Texas, July 28, 2013. Photo courtesy of Casey Lazik.

  • Female found E of Sanderson, June 2015, by Daniel Thompson and Noah Fields. Photo © Daniel Thompson.
  • Adult male found E of Sanderson in June 2015 by Daniel Thompson and Noah Fields. Photo © Daniel Thompson.

  • Male, E of Sanderson, Terrell Co., TX. Collected by D. Long.

  • F2 male, N of Sanderson, Terrell Co., TX. D. Long collection.
  • F2 female, N of Sanderson, Terrell Co., TX. D. Long collection.

  • Female, E of Sanderson, Terrell Co., TX. Collected by D. Long.

  • Female, E of Sanderson, Terrell Co., TX. Collected by D. Long.
  • Male, E of Sanderson, Terrell Co., TX. Collected by D. Long.

  • Male, E of Sanderson, Terrell Co. Collected by D. Long.

  • N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • Male, W of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • Female, N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • Female, W of Sanderson, Terrell Co., TX. Collected by C. M. Smith.
  • Female, W of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • Female, W of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.
  • N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • Male, N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • F1 male, W of Sanderson, Terrell Co., TX. C. M. Smith collection.

  • W of Sanderson, Terrell Co., TX. Collected by C. M. Smith.
  • Male, N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • N of Sanderson, Terrell Co., TX. Female collected by C. M. Smith.
  • W of Sanderson, Terrell Co., TX. Male collected by C. M. Smith.

  • N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • N of Sanderson, Terrell Co., TX. Collected by C. M. Smith.

  • Sanderson Canyon, Terrell Co., TX. Collected by R. T. Haase.
  • Sanderson Canyon, Terrell Co., TX. Collected by R. T. Haase.
  • Sanderson Canyon, Terrell Co., TX. Collected by R. T. Haase.
  • E of Sanderson, Terrell Co., TX. Collected by R. T. Haase.

  • 14 miles W of Sanderson, Pecos Co., TX. Collected by R. T. Haase.

  • 14 miles W of Sanderson, Pecos Co., TX. Collected by R. T. Haase.

  • E of Sanderson, Terrell Co., TX. Collected by Shawn Lund.