Suminia is an extinct genus of basal anomodont that lived during the Tatarian age of the late Permian, spanning approximately from 268–252 Ma.
This new material of Suminia getmanovi consisted of mainly subadult to adult specimen that were well preserved (no signs of weathering or predation), suggesting rapid burial perhaps due to a catastrophic event.
[6] Suminia are diagnosed as a small Venyukoviid with various autapomorphies such as large orbit (almost 1/3 of the skull length), large teeth in relation to the skull size, reduced number of 23 presacral vertebrae, a more long than wide cervical vertebrae (suggests elongated neck), elongated limbs, manus and pes equal to ~40% of length of their respective limb, and enlarged distal carpal 1 and tarsal 1.
Significant post cranial autapomorphies of Suminia are the reduced number of presacral and dorsal vertebrae (exclusively amphicoelous) with lack of fusion in the sacral region between vertebrae (suggests high flexibility), wide pre- and postzygapophyses, longer proportions of cervical pleurocentra, distinct proportionally longer limbs, a manus that forms ~ 40% of the length of the forelimb with particularly long, curved terminal phalanges, a pes that makes up ~38% of the hindlimb, and enlarged carpal 1 and tarsal 1 (suggests divergent first digit).
[3][6] These different morphological features indicate a significantly deviated post cranial anatomy from other anomodonts, suggesting that Suminia adopted an arboreal lifestyle (see below).
[2][7] Suminia are therefore understood to have been obligatory herbivores as the dentition and mandibular function permits shredding of plant material via posterior translation.
This provides an alternative explanation that the ability to process tough, high fiber plant material may have been a more basal feature of anomodonts than previously thought.