Abstract
After the revision of the Onthophagus species of the O. semicornis group (Ziani & Gudenzi 2007) had been published, I had the chance to examine three more specimens of this group belonging to an undescribed species, two were collected by Gianfranco Sama in northeastern Iran and one was collected in the same area by Daniele Baiocchi. Onthophagus (Palaeonthophagus) samai, new species is described herein and a modified key to the species in the O. semicornis species group is provided.
NSTL