The illustrated portion (POR) and segment (SG) codes use a femur as an example. The same codes are used for similar portions of all other long bones. Not all possible combinations of POR/SG are illustrated.
Note that if you are coding a loose tooth, the element is either MR (mandible) if it is a lower tooth, or CRN (cranium) if it is an upper.
Fragments of vertebae are quite common and you'll be using these codes often.
For the younger animals, there are a series of codes that describe unfused diaphyes and epiphyses. There are also codes to describe specimens that are fused at one end and not at the other (e.g., the distal end of the humerus fuses before the proximal end, so it is common to find specimens that are missing the proximal epiphysis, but with the distal end attached [POR=DFD])
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