Two fossil species, Paraphloeostiba electrica sp.n. and Phyllodrepa antiqua sp.n. (Staphylinidae, Omaliinae), are described from Baltic amber. Their external and relevant internal structures are illustrated using propagation phase contrast synchrotron microtomography. The palaeobiogeogaphy of the two genera, the thermophilous Paraphloeostiba, the temperate Phyllodrepa, as well as palaeoenvironment of the amber forest are discussed in light of the new findings.