Peter,
There is an abundance of stars out in the darkness:
The simulation modellers haven't thought of anisotropic dark matter at the center of stars. If they did, then I'm saying they'd get much better results.
Here's the Wikipedia entry on Lenticular Galaxies
Formation theories
The morphology and kinematics of lenticular galaxies each, to a degree, suggest a mode of galaxy formation. Their disk-like, possibly dusty, appearance suggests they come from faded spiral galaxies, whose arm features disappeared. Alternatively, as lenticular galaxies are likely to be more luminous than spiral galaxies, which suggests that they are not merely the faded remnants of spiral galaxies. Rather, lenticular galaxies might result from galaxy merger, which increase the total stellar mass and give the newly merged galaxy its disk-like, arm-less appearance
Their appearance suggest they come from faded spiral galaxies who's arm features have disappeared. According to my theory, they are often more luminous than spirals because only the galactic center exotic matter has lost it's spin and so lost it's higher anisotropic gravity on the galactic plane. The stars still have high spin exotic cores and so shine brightly. This scenario therefore gives the devolution of spiral to lenticular to elliptical. It requires a little thought and imagination but gives an elegant solution to the galaxy formation conundrum.
Alan