Figure 3. MB.R.3803, a pair of tail tip spikes and five distal caudal vertebrae of the stegosaur Kentrosaurus aethiopicus Hennig, 1915, from quarry 'St', Tendaguru, Tanzania. Length of right spike 44.6 cm. 1. top: dorsal view, bottom: ventral view. 2. Scheme showing areas with significant damage (massive surface erosion and/or crushing) visible on the bone surface (hatched) and cross sections (positions indicated by red lines). Red curves parallel to cross sections show damaged areas, white arrows point at keels. Note the small size of the keels and that an overall convex surface persists where the bone is undamaged. Click here for full size original TIFF file (18 MB).