Two species belonging to this genus are known: Garjainia prima from Russia and G. madiba from South Africa. The African species differs from the Russian one in the presence of large bony protuberances on the lateral surfaces of the jugal and postorbital bones.
The text describes two distinct species within a genus, Garjainia. One species is found in Russia (Garjainia prima), while the other is found in South Africa (G. madiba). The African species is characterized by the presence of large bony protrusions on the jugal and postorbital bones.