Table 1. Measurements (in mm) of Hyaenodon weilini from Lanzhou Basin. Measurements for H. gigas are estimated from a combination of Dashzeveg’s measurements and his figure 12 (1985), because he apparently adopted an unconventional system of measuring the dimensions of the roots at the points of contact with the maxilla.

  Lanzhou Basin Hyaenodon H. gigas
  IVPP IVPP IVPP PSS
  V12186 V12187 V12188 27–10
  left right      
P3 length   27.1   20.6  
P3 width   16.0   13.1  
P4 length 24.5 25.6 21.3   38.0
P4 width   18.0 14.5   24.0
M2 length 45.7 50.3     54.0
M2 width 18.8 18.3     22.0