First Phalanx
For the purpose of analysis, lateral left and medial right elements are defined as left. Medial left and lateral right elements are defined as right.
Elements where the proximal and/or distal epiphyses are un-fused and not with the specimen are coded as though the epiphyses are missing.
Elements where the proximal or distal epiphyses are un-fused but are present during coding, the un-fused epiphyses are grouped together for coding and cataloguing and are not counted as separated pieces.
For an un-fused epiphysis unassociated with the rest of the element it is assigned an appropriate BU number.
For the Fincastle Project, Bone Units 23 (previously undefined in the 1991 edition) and 30 were added.
BU 1
SC A
Complete element.
BU 25
SC B
Element missing portion of posterior shaft surface. Proximal and distal articular surfaces intact. (WU)
BU 27
SC C
Element with posterior medial edge missing. Posterior lateral edge intact. Drawing visually similar to BU 22. (GL)
BU 22
SC D
Anterior half of element. Opposite of BU 20. (WU)
BU 28
SC E
Element missing proximal end and posterior shaft broken along the diagonal. (GL)
BU 13
SC F
Consists of distal 1/3 – ½ of element.
BU 14
SC G
Consists of anterior portion of distal half of element. Defined as 84.12.05 for moose element from Crown site.
BU 19
SC H
Anterior half of the proximal end of the element. (GL)
BU 29
SC I
Element missing the proximal anterior quarter of the element. Opposite of BU 19. (GL)
BU 20
SC J
Posterior half of element, split along the transverse plane. (GL)
BU 24
SC K
Posterior portion of proximal end and shaft; distal end and anterior portion of proximal end missing. (WU)
BU 15
SC L
Consists of posterior portion of distal half of element. Defined as 84.12.12 for ungulate element from Crown site.
BU 16
SC M
All or portion of unfused proximal epiphyses detached and not associated with rest of element. Coded as "weathered".
BU 26
SC N
Medial shaft of element. Proximal and distal ends missing. (WU)
BU 3
SC O
Medial half of element which has been split longitudinally.
BU 4
SC P
Lateral half of element which has been split longitudinally.
BU 11
SC Q
Either BU 3 or BU 4. Indeterminate as to which.
BU 2
SC R
Proximal 1/3 – 2/3 of element.
BU 7
SC S
Consists of the proximal-lateral quarter of the element.
BU 8
SC T
Consists of the proximal-medial quarter of the element.
BU 18
SC U
Either BU 7 or BU 8 – indeterminate as to which. (DS)
BU 9
SC V
Consists of element missing the distal medial quarter (BU 5).
BU 17
SC W
Element with medial half of proximal head missing. Opposite of BU 8. (DS)
BU 10
SC X
Consists of element missing the distal lateral quarter (BU 6).
BU 21
SC Y
Element with proximal lateral ¼ missing. Similar to BU 17. (WU)
BU 5
SC Z
Consists of the distal-medial quarter of the element.
BU 6
SC AA
Consists of the distal-lateral quarter of the element.
BU 12
SC BB
Either BU 5 or BU 6. Indeterminate as to which.
BU 23
SC CC
Element complete, but proximal epiphysis is detached. Opposite of BU 16. (SB)
BU 30
SC DD
1/2 – 2/3 of distal end present. Missing 1/3 of proximal end. Similar to BU 13. (SB)