Revision History for U.S. Geological Survey Open-File Report 2018–1109 By Gordon C. Reese, Natasha B. Carr, and Lucy E. Burris Southern Great Plains Rapid Ecoregional Assessment—Volume II. Species and Assemblages ----------------------------------------------------- Posted online November 21, 2018 ----------------------------------------------------- Revised and reposted December 13, 2018 In the panel C maps for figures 6-4 and 9-4, the color assignments for landscape-level ranks were reversed so that the low rank was shown in yellow and the lowest rank was shown in green; however, the explanations showed the correct color assignments of low (green) and lowest (yellow). In this update, the maps for figures 6-4 and 9-4 (panel C) have now been fixed to correctly show landscape-level ranks as low (green) and lowest (yellow). In panels A and B for figures 6-4 and 9-4, both the map colors and explanations are correct.