SUBJECT: Testate Amoebae of the specie Centropyxis discoides from the lake Muyil, Quintana Ro, México.; CREDIT: Dr. Samuel Tehuacanero-Cuapa, Central Microscopy Laboratory, Institute of Physics and Institute of Geology, UNAM, México. Institut für Geosysteme und Bioindikation (IGeo), TU-Braunschweig, Germany.; METHOD/INSTRUMENT: Lower electron detector and Gentle Beam - JEOL JSM-7800F SEM