Figure 14. Comparison of horn core/sheath size and allometry in nodosaur osteoderms with modern cranial horns.

Keratinous-only sheath length (i.e., the portion projecting beyond bony core) regressed as a function of bony core length, at both the specimen (A) level, and genus mean (B) level. Ordinary least squares regression indicated by solid line (Table 2), light dashed lines indicate 95% CI of the relationship, and dotted lines indicate 95% predication interval of points. Thick dashed line has a slope of 1 and intercept of 0. Diamonds indicate cranial horns, with small (A) representing individual horns, large (B) indicating genus means, and polygons (B) indicating minimum convex hulls. Circles indicate postcranial osteoderms of Borealopelta.