Figure 1

Image gallery of ice-embedded Pithovirus particles using 1 MV cryo-HVEM. The small, medium, and large sized viruses are indicated in (A1–10). The arrows indicate the positions of apical pores in the particles. (B) Size distribution of the Pithovirus particles, showing histograms of the length and width on each axis. The dotted lines mark the mean values for the length and the width of Pithovirus particles. Dimensions of particles shown in Figures 1–10 are marked with red circles in the histogram in B. The particles with dual pores are marked with yellow stars. (C) The size distribution in volume of the Pithovirus particles with single pore or dual pores.