We present the first 3D observations of a diffuse elliptical galaxy ( dE ) .
The good quality data ( S/N up to 40 ) reveal the kinematical signature of an embedded stellar disc , reminiscent of what is commonly observed in elliptical galaxies , though similarity of their origins is questionable .
Colour map built from HST ACS images confirms the presence of this disc .
Its characteristic scale ( about 3 arcsec = 250 pc ) is about a half of galaxy ’ s effective radius , and its metallicity is 0.1–0.2 dex larger than the underlying population .
Fitting the spectra with synthetic single stellar populations ( SSP ) we found an SSP-equivalent age of 5 Gyr and nearly solar metallicity [ Fe/H ] =-0.06 dex .
We checked that these determinations are consistent with those based on Lick indices , but have smaller error bars .
The kinematical discovery of a stellar disc in dE gives additional support to an evolutionary link from dwarf irregular galaxies due to stripping of the gas against the intra-cluster medium .