Spiral-like structure (S)-type dusty galaxies. Each tick on the colour-bar indicates median−5σ, median−4σ, median−3σ, median−2σ, median−σ, median, median+σ, median+2σ, and median+3σ, respectively. The median and standard deviation values are calculated in the region of 0−1 R_eff, which is shown with the black ellipse. The white scale bar at the bottom corner indicates 1 kpc. On the top-right, we show an illustration of the position angles of the various galaxy components: in purple the H I-disc from Serra et al. (2014); in black the optical-disc from Krajnović et al. (2011); and in red the CO-disc from Alatalo et al. (2013).