Hahnia is also a spider genus in the (Hahniidae).Hahnia is a poorly known genus of meat-eating mammal-like reptiles (Therapsids) that lived during the Upper Triassic in Europe. This genus is based on tiny, isolated teeth, and its affinities with other cynodonts are unclear. The generic name is invalid, thus the inverted commas. The name Hahnia has already been used for a spider.