Figure 1.

Agar plate (diameter: 9 cm) for comparative experimental analysis of cell motility in myxamoebae (A). In the center of the plate the amoebae were placed into a hole (diameter: 5 mm) at time zero. The movement of the myxamoebae, in the presence of methylobacteria, away from the center, was measured at daily intervals. Species-specific differences between Trichia decipiens (B), Lycogala epidendrum (C), and Tubulifera arachnoidea (D) with respect to the areas of highest population density (1) and the largest distance from the center (2) are shown schematically.