We build on a recent photometric decomposition analysis of 7506 Galaxy and Mass Assembly ( GAMA ) survey galaxies to derive stellar mass function fits to individual spheroid and disk component populations down to a lower mass limit of log ( M _ { * } /M _ { \odot } ) = 8 .
We find that the spheroid/disk mass distributions for individual galaxy morphological types are well described by single Schechter function forms .
We derive estimates of the total stellar mass densities in spheroids ( \rho _ { spheroid } = 1.24 \pm 0.49 \times 10 ^ { 8 } M _ { \odot } Mpc ^ { -3 } h _ { 0.7 } ) and disks ( \rho _ { disk } = 1.20 \pm 0.45 \times 10 ^ { 8 } M _ { \odot } Mpc ^ { -3 } h _ { 0.7 } ) , which translates to approximately 50 % of the local stellar mass density in spheroids and 48 % in disks .
The remaining stellar mass is found in the dwarf “ little blue spheroid ” class , which is not obviously similar in structure to either classical spheroid or disk populations .
We also examine the variation of component mass ratios across galaxy mass and group halo mass regimes , finding the transition from spheroid to disk mass dominance occurs near galaxy stellar mass \sim 10 ^ { 11 } M _ { \odot } and group halo mass \sim 10 ^ { 12.5 } M _ { \odot } / h .
We further quantify the variation in spheroid-to-total mass ratio with group halo mass for central and satellite populations as well as the radial variation of this ratio within groups .