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In this paper we analyze the structural parameters of the dwarf galaxies inthe Coma cluster with $-18 \le M_{B} \le -16$ and classify them in two types:those with surface brightness profiles well fitted by a single Sersic law werecalled dwarf ellipticals (dEs), and those fitted with Sersic-plus-exponentialprofiles were classified as dwarf lenticulars (dS0s). The comparison of thestructural parameters of the dwarf galaxies in the Coma and Virgo clustersshows that they are analogous. Photometrically, the dE and dS0 galaxies in Comaare equivalent, having similar colors and global scales. However, the scale ofthe innermost parts (bulges) of dS0 galaxies is similar to the bulges oflate-type spiral galaxies. In contrast, dEs have larger scales than the bulgesof bright galaxies. This may indicate that dS0 and dE galaxies have differentorigins. While dE galaxies can come from dwarf irregulars (dIs) or from similarprocesses as bright Es, the origin of dS0 galaxies can be harassed brightlate-type spiral galaxies.Comment: 48 pages, 14 figure, 4 tables. Accepted for publication in A

Structural Parameters of Dwarf Galaxies in the Coma Cluster: On the Origin of dS0 Galaxies