Re-analysis of Aterian samples from Adrar Bous, Niger, has augmented sites in the south-central Sahara which combine classic Aterian tools with other forms more characteristic of the equatorial Middle Stone Age. We review typical tool forms and core reduction technologies, and affinities with more southern industries, as viewed by the late J. Desmond Clark. We discuss the Adrar Bous Aterian in relation to other Aterian variants and to environmental conditions over the course of its existence. Finally, we present questions for further research, including the nature of Aterian subsistence in different regions and the potential for further lithic analysis.