Genus: Nannaroter ANDERSON, SCOTT & REISZ, 2009
Etymology: Greek, nanno, "extremely small" and Greek, aroter, "ploughman."

Species: mckinziei ANDERSON, SCOTT & REISZ, 2009
Etymology: In honor of Mark McKinzie, the collector who found the skull and donated it to the Oklahoma Museum of Natural History.

Holotype: OMNH 73107

Locality: Fort Sill, OMNH Locality V51, Dolese Brothers limestone quarry at Richards Spur, Fissure Fills, just west of U.S. Highways 62 & 281, 10.5 miles south of Apache, 6 miles north of Fort Sill, SW 1/2, Sec. 31, T4N, R11W, Comanche County, Oklahoma.

Horizon: Willington Formation (Garber Formation), Summer Group, Arbuckle limestone, (Probably equivalent to the Arroyo Formation of Texas).

Biostratigraphy:

Age: Middle Leonardian stage, upper Rotliegendes Epoch, Early Permian.

Material: Skull.