1. The researchers call the material a nonantigenic keratinous protein colloid. 2. It was supported internally by collagen fibres and externally by keratinous ridges. 3. If horns are keratinous , they have a bone core. 4. Maybe this rugose brow ridge supported a keratinous or scaly structure for displays. 5. The Nariscene are described as six-limbed insectiles covered with keratinous shells. 6. The keratinous leaves, ovoid or oval, are 5 12 cm long. 7. The jaws may have borne a keratinous sheath. 8. These are reduced to stiff, keratinous quills, like porcupine quills, with no barbs. 9. All three species have a keratinous skin-covered casque on their heads which grows with age. 10. The keratinous shield thought to have covered the tip of the snout would have provided further protection.
