Extended Data Figure 6 : Graphic visualizations of bone deposits.

From: Life history of the stem tetrapod Acanthostega revealed by synchrotron microtomography

Extended Data Figure 6

Images are based on the measurements provided in Extended Data Table 1. a, Amount of bone deposited every year—that is, between two LAGs—in the regions of interest (reg.) of the four studied humeri. Except for region 2 (measured in MGUH 29020 and NHMD 74756), all regions show a relatively constant or increasing growth rate during animal development. b, Bone deposition accumulated to form the cortex. Despite a slight variation in values due to growth allometries, the growth rate (illustrated by the slope angle) is relatively constant in all regions of all specimens, meaning that all specimens grew at the same rate.