中文摘要：

描述了广西百色及永乐盆地发现的中始新世最晚期－晚始新世的猪类化石，这批已知最早的猪超科化石，大大丰富了亚洲地区的早期猪类，对了解全球猪类的早期演化有着重要价值。广西的材料被确定为两个新属新种：萨氏始新猪Eocenchoerus savagei和广西华夏猪Huaxiachoerus guangxiensis，一个新种：粗壮暹罗猪Siamochoerus viriosus和一个未定属种：Tayassuidae gen.et sp.indet.加上已发表的单尖旅游Odiochoerus uniconus。百色，永乐盆地共计发现了5种始新世猪粉化石。新属Eocenchoerus虽然臼齿结构简单，与原始的古猪类（Palaeochoerid)接近，但因其M3具有一个明显的跟座而被归人猪科，早期猪科动物非常原始的臼齿形式证明，猪科动物 起源并不晚于古猪科（Palaeochoeridae)和西瑞科（Tayassuidae)。旧大陆的古猪类长期以来被认为与新大陆的西瑞类（tayassuid)更为接近，多数学者钭其归入西瑞科。笔者认为两者共有的近祖特征，并不能支持它们更摈 亲缘关系，而且古猪类缺乏典型西瑞类的近裔特征。因而支持将Palaeochoerinae亚科作为一个独立的Palaeochoeridae科，并将发现的两个新属种Huaxiachoerus guangxiensis和Siamochoerus viriosus归入该科，西瑞类材料的发现，再次肯定了东南亚地区确实存在与新大陆典型西湍类如Perchoerus，相似的古老猪类，另外新属Huaxiachoerus在臼齿结构上也显得比其他古猪类更接近新大陆的Cynorca，如果Perchoerus和Cynorca确属新大陆西湍类两个演化支系的祖选类型，那么新大陆的猪类动物很可能源于旧大陆，鉴于百色，永乐盆地的猪类已发生了较大分异，猪类动物的分化似应不晚于中始新世。

英文摘要：

The earliest fossil suoid collection of the world from Guangxi, China, is identified as four taxa. Eocenchoerus gen. nov. is assigned to Suidae based primarily on the presence of a talon on M3. The Eocene suid indicates that the origin of Suidae is as early as that of Palaeochoeridae and Tayassuidae. The family Palaeochoeridae is accepted to group the Old World palaeochoerids, Siamochoerus viriosus sp. nov. and Huaxiachoerus guangxiensis gen. et sp. nov. are included in it, and Huaxiachoerus is considered close to Cynorca. A single upper molar is identified as a tayassuid, and is close to the typical tayassuid Perchoerus. If Cynorca and Perchoerus are indeed the root members of the two major evolutionary radiation of the New World tayassuids, the New World tayassuids should evolve from their Old World ancestors. The diversified suoid group in the Asian Late Eocene suggests the split of Suidae, Palaeochoeridae and Tayassuidae might begin at the Middle Eocene or earlier period.