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Limb developmental events scored in this analysis |
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| Forelimb event |
Hindlimb event |
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| External Form |
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| A. bud first distinct |
K. bud first distinct |
| B. AER appears |
L. AER appears |
| C. digital plate crenation (fossae separating digits dorsally) |
M. digital plate crenation (fossae separating digits dorsally) |
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| Chondrogenesis |
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|
|
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| D. humerus appears |
N. femur appears |
| E. ulna appears |
O. fibula appears |
| F. proximal carpal (ulnare) appears |
P. proximal tarsal (fibulare) appears |
| G. carpal distal to ulnare appears |
Q. tarsal distal to fibulare appears |
| H. metacarpal appears |
R. metatarsal appears |
| I. proximal phalanx appears |
S. proximal phalanx appears |
| J. distal phalanx appears |
T. distal phalanx appears |
|
Elements in the same horizontal row in the hand and foot are considered serially homologous for the purposes of this study. | |
Bininda-Emonds et al. BMC Evolutionary Biology 2007 7:182 doi:10.1186/1471-2148-7-182 |
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