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Figure Caption
Fig. 9 Schematics of different types of haemal arch and spine variations. (a) Normal caudal vertebra, (b) missing left and right haemal arches and spine, (c) supernumerary left and right haemal arches and spine, (d) supernumerary haemal arch on one side (left in the scheme), (e) absent haemal arch on one side (left in the scheme), (f) caudal shifting of the left and right haemal arch insertion, (g) caudal shifting of the haemal arch insertion on one side (left in the scheme), (h) unfused haemal spine (bifid spine). The four-headed arrow indicates the orientation.
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Full text @ J. Anat.