Genus: Keirognathus SEELEY, 1888
Etymology: Greek, keiro, “shear, cut”, Greek, gnaothus, “jaw”, + us: Shearing jaw.

Species: cordylus SEELEY, 1888
Etymology:
= Dicynodon cordylus (SEELEY, 1888)

Holotype: BMNH 49413

Locality: Klipfontein, Fraserburg, Northern Cape Province, South Africa.

Horizon:

Biostratigraphy: Cistecephalus zone.

Age: Tatarian Age, Lopingian Subepoch, Zechstein Epoch, Late Permian.

Material: Fragmentary skull and fragmentary skeleton.
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