The Manchovites were an intelligent species.

Some time before 2373, the Manchovites were embroiled in a war with another species, so Gaila and Hagath sold them 150,000 hand-held weapons. They also sold 100,000 of those weapons to the Manchovite enemies, but an armistice was signed later, so no more weapons were bought. (DS9: "Business as Usual")

This species was only mentioned in dialogue.
According to the script, this species' name was pronounced as " MAENK-uh-vites". [1]