The graph shows the number of years the signal has survived vs. the inferred dark matter mass. The particle names follow the usual Particle Data Group conventions. The label's size is related to the statistical significance of the signal, and the color to the Bayesian likelihood that the signal originates from dark matter. The masses of the discovered particles span 11 orders of magnitude, although the largest concentration is near 100 GeV (this is known as the WIMP miracle). If I missed any particle for which a compelling evidence exists, let me know, and I will add it to the graph.
Here are the original references for the Bulbulon, Boehmot, Colaron, Daemon, Cresston, Hooperon, Wenigon, Pamelon, and the mother of Bert and Ernie.