The abundance and diversity of dicynodonts during this period, combined with incomplete or inadequately prepared specimens, have led to challenges in determining relationships within this taxon.

[4] The only G. elginensis specimen is a natural mold of a nearly complete skull and mandible, associated left humerus, and an isolated metapodial or proximal phalanx.

[7] Analyses of G. elginensis and G. locusticeps indicate affinities to each other, but each also shares many characteristics with other taxa, including Pelanomodon, Oudenodon, and Ptychognathus (Lystrosaurus).

[3] Maisch and Gebauer considered the squared off anterior snout tip and reduced exposure of squamosal in occiput to be characteristics exclusively expressed in Geikia.

[2] Prior to their analysis, Rowe described the generic diagnosis of Geikia as “dicynodonts having no tusk or postcanine teeth; highly vaulted palate; anterior palatal ridges of premaxilla reduced or absent; large palatine having rugose palatal surface; palatine having extensive contact with maxilla and premaxilla; length of interpterygoidal vacuity not less than half the length of the interpterygoidal fossa; interpterygoidal vacuity lying entirely within roof of interpterygoidal fossa; well developed maxillary caniniform process having pronounced lateral ridge; sharp occlusal margin of beak; sharp ridge or “keel” developed on central edge of maxilla behind caniniform process; septomaxilla having exposure on lateral surface of snout behind external nares; anterior surface of premaxilla flat, oriented vertically, and meeting lateral surface of premaxilla in abrupt “corner”; single, prominent preorbital protuberance".

[2] Compared to other dicynodonts, the shortened skull could be indicative of specific herbivory habits, such as biting off small pieces of vegetation.

[3] Pertaining to mastication, crushing action was likely more emphasized than slicing, due to structural limitations of lower jaw movement.

[9] The coarse, hard sand presented difficulty in the development of the specimen,[4] which was recovered from a pebbly layer near the base of the formation.