Genus: Polysphenodon JAEKEL, 1911
Etymology: Greek, poly, "many" + Sphenodon.

Species: muelleri JAEKEL, 1911
Etymology:

Holotype: MB.R.1302

Locality: Drill core from a borehole at 775 m depteh, near Fallersleben (now part of the city of Wolfburg), Hannover, Saschen (Saxony) State, Germany.

Horizon: Middle Keuper Subgroup..

Biostratigraphy:

Age: Carnian or Norian Stage, Late Triassic Epoch, Late Triassic.

Material: Fragmentary skull and fragmentary skeleton.