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Studies of nucleated dwarf galaxies can constrain the scenarios for theformation and evolution of nuclear star clusters (NSC) in low-mass galaxies andgive us insights on the origin of ultra compact dwarf galaxies (UCDs). Wereport the discovery of a NSC in the dwarf galaxy KKs58 and investigate itsproperties together with those of another NSC in KK197. Both NSCs are hosted bydwarf elliptical galaxies of the Centaurus group. Combining ESO VLT MUSE datawith photometry from VLT FORS2, CTIO Blanco DECam, and HST ACS, as well ashigh-resolution spectroscopy from VLT UVES, we analyse the photometric,kinematic and stellar population properties of the NSCs and their hostgalaxies. We confirm membership of the NSCs based on their radial velocitiesand location close to the galaxy centres. We also confirm the membership of twoglobular clusters (GCs) and detect oblate rotation in the main body of KK197.Based on high signal-to-noise spectra taken with MUSE of the NSCs of both KKs58and KK197 we measure low metallicities, [Fe/H] = $-1.75 \pm 0.06$ dex and[Fe/H] = $-1.84 \pm 0.05$ dex, and stellar masses of $7.3 \times 10^5 M_\odot$and $1.0 \times 10^6 M_\odot$, respectively. Both NSCs are more metal-poor thantheir hosts that have metallicities of $-1.35 \pm 0.23$ dex (KKs58) and $-0.84\pm 0.12$ dex (KK197). This can be interpreted as NSC formation via thein-spiral of GCs. The masses, sizes and metallicities of the two NSCs placethem among other NSCs, but also among the known UCDs of the Centaurus group.This indicates that NSCs might constitute the progenitors of a part of thelow-mass UCDs, although their properties are almost indistinguishable fromtypical GCs.

Metal-poor nuclear star clusters in two dwarf galaxies near Centaurus A suggesting formation from the in-spiraling of globular clusters