1. MARÍA JOSÉ APODACA is a researcher with a focus on biogeography and evolution, División Plantas Vasculares, Museo de La Plata, Universidad Nacional de La Plata, Paseo del Bosque s/n. 1900, La Plata, Argentina; email: apodaca@fcnym.unlp.edu.ar.
2. JOSEPH D. MCINERNEY is a past president of the National Association of Biology Teachers, a former director of the Biological Sciences Curriculum Study, and former Executive Vice President the American Society of Human Genetics, Lutherville, Maryland 21093; email: mcinerney.joseph1@gmail.com.
3. OSVALDO E. SALA is Julie A. Wrigley Professor the School of Life Sciences and School of Sustainability, Director Global Drylands Center, Arizona State University, Tempe, Arizona 85287-4501, his research focus on ecology and biodiversity; email: osvaldo.sala@asu.edu.
4. LILIANA KATINAS is a professor of biogeography and plant morphology and researcher at División Plantas Vasculares, Museo de La Plata, Universidad Nacional de La Plata, Paseo del Bosque s/n. 1900, La Plata, Argentina; email: katinas@fcnym.unlp.edu.ar.
5. JORGE V. CRISCI is an emeritus professor and a researcher on biogeography and evolution, División Plantas Vasculares, Museo de La Plata, Universidad Nacional de La Plata, Paseo del Bosque s/n. 1900, La Plata, Argentina; email: crisci@fcnym.unlp.edu.ar.