ABSTRACT

During the 1980s, a Pliocene canid from Baja California Sur, Mexico, was described as a new Cerdocyon species, C. avius. Whereas some investigators believe that C. avius was related to the origin of South American foxes of the tribe Cerdocyonina, others suggested that it is related to members of the tribe Vulpini. Our observations and analyses confirm that it is a vulpine with a morphological combination of features that has not been described previously: marked subangular lobe in the hemimandible, m1 hypoconulid is practically absent, and the m3 is single-cusped. We propose Ferrucyon, gen. nov., as a genus including at present one species, F. avius. In the phylogenetic analysis, this species is related to North American Metalopex macconnelli, and to the Eurasian Nyctereutes spp., which creates a relationship between the foxes of the Old and New World.

摘要

在1980年代，来自墨西哥下加利福尼亚州苏尔的上新世犬科动物被描述为一种新的Cerdocyon物种，C。avius。而一些研究者认为C. avius是有关部落Cerdocyonina南美狐狸的出身，其他人认为，这是关系到部落Vulpini的成员。我们的观察和分析证实，这是一种具有形态学特征的凡尔滨，以前没有描述过：在易染的半角下叶，几乎没有m1混血，而只有m3是单瓣。我们提出Ferrucyon，gen。十一月，作为一个属，包括目前一个物种，F. avius。在系统发育分析中，该物种与北美金枪鱼（Macropopex macconnelli）以及欧亚混血种（Eurasian Nyctereutes spp。）有关，后者在新旧世界的狐狸之间建立了联系。