However, similarities between the dental morphology of Nuralagus and Eurasian members of the extinct genus Alilepus have led to speculation that Alilepus is closely related to and, possibly, the ancestor of Nuralagus. The only other mammal native to Menorca during the Pliocene was the extinct giant dormouse species Muscardinus cyclopeus, which belongs to the same genus as the living hazel dormouse, with a herpetofauna including the giant tortoise Solitudo gymnesica, snakes, amphisbaenian, lacertid and gekkonid lizards, and alytid frogs.
On the other hand, similarities between the dental structure of Nuralagus and Eurasian members of the extinct genus Alilepus have sparked debate about whether Alilepus is closely related to and possibly the common ancestor of Nuralagus. The only other mammal native to Menorca during the Pliocene was the extinct giant dormouse species Muscardinus cyclopeus, which shares the same genus as the living hazel dormouse, accompanied by a herpetofauna including the giant tortoise Solitudo gymnesica, snakes, amphisbaenians, lacertid and gekkonid lizards, and alytid frogs.