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. 2016 Aug 3;4:e2312. doi: 10.7717/peerj.2312

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©2016 White et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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(A) Pedal ungual II-3 imported into Rhinoceros 5.0. (B) Outer surface curve drawn to dorsal ungual surface. (C) Circle attached to the best fit of outer curve of the ungual. (D) Section planes drawn from a centre point of the drawn circle. (E) Section through the ungual displaying the outer surface of the ungual. (F) Cross-section ribs of the ungual redrawn to represent unbroken sections. (G) A perfect circle was dorsally offset to the claw’s rim for sheath thickness in Rhinoceros 5.0. The offset synthesized the dorsal sheath thickness which was progressive until the sheath’s tip. (H) Wear facets on te reconstructed sheaths. Abbreviations: Centre of circle (Xu), Ungual angle (Yu), Sheath extent (Yest).