Dominant NSC formation channel for the studied galaxies on the NSC mass-galaxy mass plane. The large different symbols indicate the identified dominant NSC formation channel for the galaxies analysed in this work. The smaller symbols refer to the results presented in Fahrion et al. (2020a, 2021). We colour-coded the symbols by the mass fraction of old and metal-poor populations (> 2 Gyr, <  − 1.0 dex, see Table 2). The star shows the position of the MW NSC for reference (Neumayer et al. 2020). The dashed lines indicate the mass limits where a transition of the dominant NSC formation channel was proposed. NGC 1487 was excluded from this figure.