Scaling relations of NGC 4594 as compared with those of other M_★ > 10⁹ M_⊙ elliptical, spiral and irregular galaxies. Top: pentagons show the neutral gas to stellar mass content for galaxies of all morphological types with H i detections in the GASS survey (Catinella et al. 2010). Dashed lines show the weighted median and 3 σ limits when non-detections are also included. Middle: specific SFR of galaxies in the KINGFISH sample (Skibba et al. 2011), with different symbols corresponding to different morphological types. Bottom: same as for the middle plot, but for the dust-to-stellar mass ratio. In all three panels, it is obvious that NGC 4594 is a clear outlier of the relations followed by spirals, but not so if the stellar disc is considered as an independent entity (solid symbols).