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Map of Brazil with main rock groups, karst areas, and formations with obligatory cave-dwelling species. Threats are indicated by letters as follows: A Minig B Reservoir construction C Deforestation for pastures D Deforestation for agriculture E Pollution of subterranean drainages F Tourism G Land conflict H Road construction, I Lowering of water table J Small hydroelectric power station buildings, K Pesticides L Natural gas and oil exploration. For Bambuí group, we grouped as follows (see Table