Prolagus imperialisProlagus imperialis is an extinct species in the genus Prolagus. It was one of the species in this genus that were recently discovered. Prolagus imperialis may have resembled a pika.NomenclatureProlagus imperialis was named after Poggio Imperiale, the place where its fossils were discovered. Its name might mean "first rabbit of Poggio Imperiale".SizeProlagus imperialis is larger than the species which was discovered along with it, Prolagus apricenicus. Also, Prolagus imperialis is the largest of all Prolagidae, weighing about.