Notosyodon is an extinct genus of non-mammalian therapsids.

The holotype PIN 2505/1, consists of a partial skull preserving the orbital, occipital, and basicranial regions.

[1] Other remains include PIN 2505/2, a right lower incisor, and PIN 2505/3, a left upper postcanine, found associated with the holotype and PIN 2608/1, the anterior half of a left dentary found on the right bank of the Donguz River, near Dolmatovskii Farm, Sol-Iletsk District, Orenburg Region, Russia.

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