${{\mathit \Xi}_{{{c}}}^{'0}}$ $I(J^P)$ = $1/2(1/2^{+})$
The ${{\mathit \Xi}_{{{c}}}^{'0}}$ and ${{\mathit \Xi}_{{{c}}}^{'+}}$ presumably complete the SU(3) sextet whose other members are the ${{\mathit \Sigma}_{{{c}}}^{++}}$, ${{\mathit \Sigma}_{{{c}}}^{+}}$, ${{\mathit \Sigma}_{{{c}}}^{0}}$, and ${{\mathit \Omega}_{{{c}}}^{0}}$: see Fig.$~$5 in the ``Quark Model'' review. The quantum numbers given above come from this presumption but have not been measured.