Didymictis is the only viverravid genus for which there are considerable postcranial remains. The genus was primarily terrestrial but at least partly cursorial, similar to a
civets.
Didymictis had an elongated and relatively large skull with small and low braincase and a long and narrow basicranial region. The occipital and sagittal crests are very high. The limbs are of moderate length with subdigitigrade and five-toed feet. The dentition () contrasts those of basal
carnivoraforms by the sharp differentiation between sectorial and tubercular dentition, the loss of the last molar and an elongated second molar, similar to the dentition in
bears and
raccoons. The permanent second mandibular
premolar of
Didymictis erupted before its third and fourth mandibular premolars, which erupted simultaneously; its first and second mandibular
molars likewise erupted before the third and fourth premolars, while the permanent first maxillary molar's eruption preceded the eruption of the second, third, and fourth maxillary premolars. Comparing
Didymictis to
Vulpavus, a much smaller and more agile carnivoraform, Heinrich and Rose in 1997 noted that
Didymictis' limbs, especially the hindlimb, are similar to those in extant carnivorans adapted for speed, and the forelimbs to some extent are specialized to digging. The authors concluded that
Didymictis was a relatively specialized terrestrial carnivore capable of hunting with speed or pursuing by digging. ==Classification and phylogeny==