Correction to: Nature Published online 30 September 2020

In Figure 2b of this Article, two labels were inadvertently swapped: the brown dot should be labelled ‘PVALB+’, and the yellow dot should be labelled ‘SST+’. In addition, the y-axis label of Fig. 4g should read “Percentage of striatal interneurons” not “Striatal interneurons (%)” and the numbers on the axis should be 0, 10, 20, 30, 40 (rather than 0, 0.1, 0.2, 0.3, 0.4). In the sentence “The TAC3+ interneuron population appeared to be shared between marmosets and humans (Fig. 4g), and constituted 30% and 38% of the interneurons sampled in marmoset and human striatum, respectively”, ‘38%’ should read ‘34%’. These errors have been corrected online.