Figure 2

(A) Young's modulus (average and one standard deviation) by element type and position along each element. (B) Measurements taken along the length (oral to aboral, 1 through 5, respectively). (C) Mosaicity along the length of elements in zones 1–3. Mosaicity can only be calculated in those areas exhibiting single crystal diffraction patterns²¹ and is a measure of nanocrystallite disordering (D) where more orderly arrangements have a lower mosaicity value. Comparing (A) and (C) there is a clear correlation between increasing mosaicity and increasing Young’s modulus as well as consistency between juvenile and older specimens.