Abstract: This paper describes a new genus of Phenacodontidae, Lnphocion. Although phenacodontids are important elements from Torrejonian (M. Paleocene) through Wasatchian (Early Eocene) of North America, only a few specimens have been found in Europe, and difinite phenacodontid has never been recorded in Asia until the discovery of the Wutu specimens. The Ectocion—like upper cheek teeth were collected from the Wutu Formation in 1993, along with Mesodmops dawsonae (Multituberculata), Changlelestes dissetiformis (Insectivora), palaeanodonts, carpolesüd plesiadapoids (Beard and Wang, 1995), rodents (Tong and Dawson, 1995), hyoposodontid condylarths, creodonts, carnivores, tillodonts, and primitive perissodactyls.

摘要： 记述了在山东早始新世地层中发现的一种伪齿兽类—亚洲脊兽(新属、新种)(Lophocion asiaticus gen. et sp. nov.)，肯定了伪齿兽类在亚洲的存在。新种在牙齿形态上与北美的Ectocion接近，但脊齿化程度较高，表现在上臼齿上有初始的后脊，从次尖向不同方向伸出三条清晰的棱脊。这些特征使新属容易与其他已知伪齿兽类相区别。