Mean value of posterior medial accessory cusp for 30 foot stratigraphic intervals at Toadstool Park and Munson Ranch, Sioux County, Nebraska. The sample size for each interval is shown in parentheses. Mean value of lingual accessory cusp for 30 foot stratigraphic intervals at Toadstool Park and Munson Ranch, Sioux County, Nebraska. The sample size for each interval is shown in parentheses. Result of Cluster analysis using Ward method on standardized mean values of 27 groups of Ischyromys .
Size is the first order distinguishing variable.
Two dimensional output of multidimensional scaling on 27 populations including absolute size. Two dimensional output of multidimensional scaling on 27 populations excluding absolute size. Result of Cluster analysis using Ward method on standardized mean values of 27 groups of Ischyromys after overall size was factored out. Plot of mean values of the anterior and posterior angles between the tooth row and the ventral margin of the jaw. Length Length Figure 32.