New strange pentaquarks

The new strange pentaquarks observed by LHCb are very likely hadronic molecules consisting of $\Xi_c\overline{D}$ and $\Xi_c\overline{D}^*$. We discuss the experimental evidence supporting this conclusion, pointing out the similarities and differences with the $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$ pentaquarks in the nonstrange sector. The latter clearly are hadronic molecules consisting of $\Sigma_c\overline{D}$ and $\Sigma_c\overline{D}^*$. Following this line of thought, we predict three additional strange pentaquarks consisting of $\Xi^{'}_{c}\overline{D}$ and $\Xi^{'}_{c}\overline{D}^*$. The masses of these states are expected to be shifted upward by $M(\Xi^{'}_{c})-M(\Xi_c) ≈110  MeV$ with respect to the corresponding known strange pentaquarks.