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记述了采自美国内布拉斯加州中新统的一保存较完整的美獾（Ｌｅｐｔａｒｃｔｕｓ）头骨化石。与美獾属的其他已知种相比，该标本的颊齿粗壮，Ｐ４臼齿化，近方形，宽略大于长，齿尖磨蚀均匀，Ｉ３犬齿化，且向大齿方向弯曲；Ｍ１宽略大于长，且比已知种的Ｍ１大；听泡具钩状突，突起上有一明显的舌骨关节面。依据上述与已知种的差别，我们将其定为一新种Ｌｅｐｔａｒｃｔｕｓｍａｒｔｉｎｉｓｐ ｎｏｖ。新种的牙齿形态及齿尖磨蚀状况显示其为杂食动物。
Describes a more preserved collection of Leptarctus skull fossils from the Miocene of Nebraska in the United States. Compared with other known species of the genus Meyloglossus, the cheek teeth of this specimen are stout with P4 molars, nearly square, slightly wider than long, with uniform tooth abrasion, I3 canine teeth, and bending towards large teeth; M1 Greater than the length, and larger than the known species of M1; listen to bubbly hooked process, the protrusion has a prominent hyoid surface. Based on the above differences with known species, we will be a new species Leptarctusmartinisp nov. The new species of tooth morphology and tip abrasion conditions show that it is omnivorous.