  We study charmed baryon resonances which are generated dynamically within a
unitary meson-baryon coupled channel model that treats the heavy pseudoscalar
and vector mesons on equal footing as required by heavy-quark symmetry. It is
an extension of recent SU(4) models with t-channel vector meson exchanges to a
SU(8) spin-flavor scheme, but differs considerably from the SU(4) approach in
how the strong breaking of the flavor symmetry is implemented. Some of our
dynamically generated states can be readily assigned to recently observed
baryon resonances, while others do not have a straightforward identification
and require the compilation of more data as well as an extension of the model
to d-wave meson-baryon interactions and p-wave coupling in the neglected s- and
u-channel diagrams. Of several novelties, we find that the Lambda_c(2595),
which emerged as a ND quasi-bound state within the SU(4) approaches, becomes
predominantly a ND* quasi-bound state in the present SU(8) scheme.
