A hand bone

Tupuxuara has four metacarpals. One for each finger. The fourth finger, of course, has a larger one. This post is about metacarpal #4.

DCF 1.0

We only have four views of each one. Very good pictures, but no distal and proximal views of the bone ends. So I have to guess what they look like from the pictures.

The bone shafts are somewhat cone shaped, a bit flat on one side, narrow and rounded near one end (distal) and triangular at the other end (proximal). I started with a sheet of 5 mm foam for each one.

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Folded and twisted until I could roll it into shape.

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Rolled it. Held everything in place with rubber bands. Then I made the bone ends with thicker (3 cm) XPS foam. I made the shaft slightly longer so I could insert it into the wheel-shaped distal end.

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When they were dry, I did some trimming, shaping and texturing with a knife and a lighter.

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And this is the result. Four views. The pencil is 16 cm long.

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This is the distal end (the end that connects to the first phalanx of the fourth finger).

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And this is the proximal end which connects to the distal carpal (wrist).

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That’s only one metacarpal. I need three more for the small fingers. They run parallel to the big one and are connected through cartilage and muscles. But I will finish the humeri and radio-ulna pairs before making them.

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1 Comment

Filed under Pterosaur #5: Tupuxuara

One response to “A hand bone

  1. Pingback: Making of a Tupuxuara | The Imaginary Pterosaur

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