[1] CSIC, Museo Nacl Ciencias Nat, Dept Biodiversidad & Biol Evolut, Jose Gutierrez Abascal 2, E-28006 Madrid, Spain
[2] Texas Parks & Wildlife Dept, 4200 Smith Sch Rd, Austin, TX 78744 USA
[3] Texas State Univ, Aquat Stn, Dept Biol, San Marcos, TX USA
[4] Texas State Univ, Edwards Aquifer Res & Data Ctr, San Marcos, TX USA
[5] CSIC, Museo Nacl Ciencias Nat, Dept Colecc Colecc Tejidos & ADN, Madrid, Spain