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We present new estimates of ages and metallicities, based on FORS/VLT optical(4400-5500A) spectroscopy, of 16 dwarf elliptical galaxies (dE's) in the FornaxCluster and in Southern Groups. These dE's are more metal-rich and younger thanprevious estimates based on narrow-band photometry and low-resolutionspectroscopy. For our sample we find a mean metallicity [Z/H] = -0.33 dex andmean age 3.5 Gyr, consistent with similar samples of dE's in other environments(Local Group, Virgo). Three dE's in our sample show emission lines and veryyoung ages. This suggests that some dE's formed stars until a very recent epochand were self-enriched by a long star formation history. Previous observationsof large near-infrared (~8500A) Ca II absorption strengths in these dE's are ingood agreement with the new metallicity estimates, solving part of theso-called Calcium puzzle.

Towards a Solution for the Ca II Triplet Puzzle : Results from Dwarf Elliptical Galaxies