Comparative anatomy of the seventh cervical vertebra of KNM-WT 15000 through 3D geometric morphometrics

CA Palancar, N Torres-Tamayo… - biannual meeting of …, 2019 - researchgate.net
biannual meeting of the East African Association for …, 2019researchgate.net
The cervical spine is of great importance to understand posture and locomotor pattern of
ancient species. However, cervical vertebrae are badly preserved in the fossil hominin
record, as is the case of KNM-WT 15000 (WT15k)(identified as H. erectus), which only
preserves the C7 (Fig. 1). Even so, many features of this vertebra, such as the body wedging
and the orientation of the articular facets can be illustrative of the entire cervical spine
morphology. The first exhaustive analysis of WT15k compared its thoracic vertebrae with …
The cervical spine is of great importance to understand posture and locomotor pattern of ancient species. However, cervical vertebrae are badly preserved in the fossil hominin record, as is the case of KNM-WT 15000 (WT15k)(identified as H. erectus), which only preserves the C7 (Fig. 1). Even so, many features of this vertebra, such as the body wedging and the orientation of the articular facets can be illustrative of the entire cervical spine morphology. The first exhaustive analysis of WT15k compared its thoracic vertebrae with those of adult and juvenile Homo sapiens and chimpanzees and they concluded that WT15k thoracic vertebrae were more similar to those of H. sapiens, although the developmental pattern was not the same. Based on this work1, we hypothesize that the WT15k C7 is human-like, but with different ontogenetic changes.
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