华南河马齿河猪(偶蹄目,哺乳纲)的新材料(英文)

New materials of Hippopotamodon (Artiodactyla,Mammalia) from southern China

2004年以来,广西崇左系统发掘出土了一些与巨猿共生的早更新世最后河马齿河猪(Hippopotamodon ultimus)的新材料。根据新材料及以前积累的各地点材料,产于广西、贵州和重庆的原"最后双齿尖河猪(Dicoryphochoerus ultimus)"的系统分类位置由"双齿尖河猪"属修订到河马齿河猪属(Hippopotamodon),而最后河马齿河猪(H.ultimus)是河马齿河猪属中的有效种。这种猪的个体较大,大于猪属(Sus)的成员。其鼻吻部很长,P1和P2间的齿隙发育,M3第三叶相对窄小,下犬齿verrucosus型,p4主尖在顶部分裂成双尖,m3的第三叶由两个主尖组成。最后河马齿河猪仅分布于华南地区,其时代分布局限于早更新世早期和中期,是河马齿河猪的最晚代表。

New materials of Hippopotamodon ultimus associated with Gigantopithecus have been collected in the systematic excavations carried out at Chongzuo since 2004. The taxonomic position of the former ＂Dicoryphoehoerus＂ ultimus from Guangxi, Guizhou and Chongqing has been revised from Dieoryphochoerus to Hippopotamodon based on the study on both new and old materials, and H. ultimus is a valid species of Hippopotamodon. It is a suid larger than all known Sus with elongated snout, developed diastema between the P1 and the P2, short and narrow third lobe of the M3, verrucosus type lower canine, the main cusp of the p4 cleft at the tip into twin summits, double cusped third lobe of the m3. H. ultimus ranges only in South China. Its chronological distribution is limited from the early to the middle stages of the Early Pleistocene. It is an ultimate representative of Hippopotamodon.