FIGURE 10. Capacikala gradatus (Capacik. gad.), Capatanka cankpeoi (Capat. cank.) and Palaeocastor nebrascensis (Palaeoc. nebr.) with relatively large samples, Palaeocastor sp. (Palaeoc. sp.), P. fossor, Pseudopalaeocastor barbouri (P. barbouri) and Capacikala parvus (Capacik. parvus) with smaller samples (see appendix for details on residuals). The structure matrix for all fucntions 1 to 6 is given, illustrated are function 1 to 2; statistical significance for function 1 to 6 (significance function 1 to 2 0.000, function 2 to 6 0.000, function 3 to 6 0.52, function 4 to 6 0.513, function 5 to 6 0.669 and function 6 0.887).