An isolated horn sheath, indicating the keratinous outer surface of the claw in life, lies near the second finger of the left manus.
22.
Christiansen and Tschopp ( 2010 ) found that the skin was smooth with long, parallel, shallow grooves indicating a keratinous structure covering the plates.
23.
As with other pangolins, the long-tailed pangolin is covered with 9 to 13 rows of overlapping, artichoke leaf-shaped keratinous scales.
24.
Studies of the bone surface show that at least the tips of the jaws supported a hard, keratinous beak similar to that found in modern birds.
25.
Correlations between infections and soil types indicate that most improved soils of the clayey or clayey-sandy type are preferred, particularly those fertilized with keratinous manure.
26.
Tumor cells transform into keratinized squamous cells and form round nodules with concentric, laminated layers, called " cell nests " or " epithelial / keratinous pearls ".
27.
Soft tissue from the mouth region of SMA 002 made researchers propose in 2016 that the tooth crowns were covered by gingival tissue, and perhaps a keratinous beak.
28.
As in the Giraffidae, skin covers the bony cores, but in the pronghorn it develops into a keratinous sheath which is shed and regrown on an annual basis.
29.
As these are the bony cores of the claws, they would have been covered in a keratinous sheath that extended the " nail " and ended in a sharp tip.
30.
A keratinous covering would also allow greater surface area for the plates to be uses as a mating display structures, which could be potentially coloured like the beaks of modern birds.
