  A new scheme of state classification is proposed and applied to analyze
masses of the heavy baryons $\Omega_{Q}$, $\Sigma_{Q}$ and $\Xi_{Q}^{\prime}$
in P-waves. The results confirm all excited $\Omega_{c}$ and $\Omega_{b}$
baryons reported recently by LHCb to be bound states of a P-wave $ss$-diquark
and a respective charm or bottom quark, and thereby predict Regge trajectories
for more excited $\Omega_{c}$ and $\Omega_{b}$ baryons. We suggest one excited
{$J^{P}=5/2^{-}$} $\Omega_{b}$ state to be unseen by LHCb around $6352$ MeV,
and predict P-wave masses of all spin-partners of the odd-parity baryons
$\Sigma_{c}(2800)/\Xi_{c}^{\prime}(2942)$ and
$\Sigma_{b}(6097)$/$\Xi_{b}^{\prime }(6227)$. A computation is further given in
a relativized potential quark models to explain matched values of spin
couplings of all considered baryons, by which a scaling law for these spin
couplings is discussed.
