Fig. 3.

The results of multiple logistic regressions of extinction risk on (A) percent truncation, (B) percent environmental shift/truncation, and (C) maximum paleolatitude for each interval. Positive log-odds indicate that extinction risk increases as the variable in question increases and vice versa. In addition to these three variables, regressions controlled for genus age, occupancy, substrate preference, and Laurentian and global geographic range. Dap = Dapingian, Darr = Dariwillian, San = Sandbian, K₁ = early Katian, K₂ = late Katian, H = Hirnantian, Rh = Rhuddanian, Ae = Aeronian, Tely = Telychian, Wen = Wenlockian.