Characters x osteoderms matrix used for the cluster analysis.

The qualitative characters for the cluster analysis were: 1) Intracingular morphology of the bulb: flat (0), convex (1) concave (2); 2) Intracingular radial ornamentation of the bulb: pitting (0), fibers (1); 3) General contour in internal view: widen (0), elongated (1); 4) Symmetry: bilateral (0), asymmetric (1); 5) Root dorsoventrally flattened (0), not flattened (1); 6) External ornamentation of the root: rugose, interwoven fibers without nodules (0), perlated, with nodules (1); 7) Number of keels in the internal side: one (1), two (2), three (3); 8) Type of cingulum: excavated border (0), platform (1).