Gustavo Hormiga, hormiga@gwu.edu¹, M. Arnedo², S. Benjamin³, J. Bond⁴, J. Coddington⁵, P. Goloboff⁶, C. Grismado⁷, C. Griswold⁸, Cheryl Hayashi⁹, M. Hedin¹⁰, W. Maddison¹¹, J. Miller¹, N. Platnick¹², L. Prendini¹³, M. Ramírez¹⁴, Nikolaj Scharff¹⁵, D. Silva⁸, P. Sierwald¹⁶, C. Vink¹⁰, and W. Wheeler¹³. (1) George Washington University, Spider Phylogeny Group, Department of Biological Sciences, Washington, DC, (2) Universitat de Barcelona, Dept. Biologia Animal, Barcelona, DC, Spain, (3) George Washington University, Department of Biological Sciences, Washington, DC, (4) East Carolina University, Department of Biology, Washington, DC, (5) Smithsonian Institution, Entomology, Washington, DC, (6) Instituto Miguel Lillo, INSUE, DC, Argentina, (7) Museo Argentino de Ciencias Naturales, División Aracnología, Department of Biological Sciences, Buenos Aires, DC, Argentina, (8) California Academy of Sciences, Department of Entomology, San Francisco, CA, (9) University of California, Department of Biology, Riverside, CA, (10) San Diego State University, Department of Biology, San Diego, CA, (11) University of British Columbia, Departments of Zoology and Botany, BC, Canada, (12) American Museum of Natural History, Department of Entomology, New York, NY, (13) American Museum of Natural History, Division of Invertebrate Zoology, New York, NY, (14) Museo Argentino de Ciencias Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, División Aracnología, Department of Biological Sciences, Buenos Aires, DC, Argentina, (15) Zoological Museum, University of Copenhagen, Copenhagen, DC, Denmark, (16) The Field Museum of Natural History, Department of Zoology - Insects, Chicago, IL