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Rh Tapinocephalus Owen, Taurops Broom, Archaeosuchus Broom, Scapanodon Broom, Eccasaurus Broom, South Africa.

. Upper Permian. Deuterosaurus, Eichwald, Ural Mts.

. Upper Permian. Rhopalodon, Eichwald, Ural Mts.

. Upper Permian. Titanosuchus Owen, South Africa. "Lamiasaurus" [snout].

About the size of a rat. Skull short; orbits large; lacrimals continuous to septomaxilla; temporal opening bounded by postorbital, squamosal, and jugal; possibly the preparietal, and probably the interparietal, present; parietal foramen large; teeth isodont, subisodont, or absent; quadratojugals obsolete or absent; vertebrae notochordal, intercentra unknown; two or three sacrals, probably twenty-eight presacrals; parasternals present; no acromion and no cleithrum; pelvis plate-like, pubic foramen large; carpus primitive, tarsus with or without a fifth tarsale; phalangeal formula 2, 3, 3, 3, 3.

. A single row of subisodont teeth.

Middle Permian. Galechirus Broom, Galesphyrus Broom, Galepus Broom, South Africa.

. Edentulous.

Middle Permian. Galeops Broom, South Africa.

. Macroscelesaurus Haughton.

From the size of a mouse to that of a tapir, vegetable or invertebrate feeders. Large temporal opening bounded by postorbital, squamosal, and jugal. Skull typically short and wide, the face short; quadrates and squamosals large; lacrimals small; quadratojugals small or obsolete. Preparietal usually present, in front of, or