Matanomictis

Matanomictis can be distinguished from other early carnivorans like amphicyonids like Pseudocyonopsis and Cynelos as both of these are larger, lack a diastema between p4 & m1 and have larger carnassial talonids, and early ursids like Pachycynodon as they are bunodont and have lower carnassial talonids compared to Matanomictis.^[1]

Matanomictis can be confidently assigned to mustelids as its lower carnassial has a wide, long trigonid with a high protoconid, the m1 trigonid being only slightly longer than talnoid, a large hypoconid on a rounded talonid, and a diastema between the p4 and m1 teeth. Notably, the carnassial trigonid is lower and broader compared to Palaeogale, which was originally thought to be a mustelid but is now considered as a indeterminate carnivoran.^[2][3] However, it lacks the specialized features of any mustelid subfamily; for instance, it has a low carnassial as seen in lutrines, but absence of crowding of the premolars(both of which are diagnostic of lutrine subfamily),^[1][4] has a secondary cusp in last premolar as seen in melines, it lacks a high trigonid with a small metaconid and a short talonid but has anterior position of the metaconid, further distinguishing Matanomictis from other mustelids.

Matanomictis is currently one of the two known mammalian vertebrates known from the Oligocene Maniyara Fort Formation, the other being a dugongid, Bharatisiren indica.^[5]