The backdrop of Willa Cather’s works is usually set on the prairie of West Nebraska.She focuses on the depiction of the......

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相比，该标本的颊齿粗壮，Ｐ４臼齿化，近方形，宽略大于长......