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Vertebrata Palasiatica ›› 2009, Vol. 47 ›› Issue (2): 135-152.

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RHINOCEROTIDS (MAMMALIA, PERISSODACTYLA) FROM LUFENGPITHECUS SITE, LUFENG, YUNNAN

DENG TAO, QI GUO-QIN   

  • Online:2009-06-15 Published:2009-06-15

云南禄丰古猿化石地点的犀科化石

邓涛,祁国琴   

Abstract: The rhinocerotid fossils from the Lufengpithecus site in Lufeng, Yunnan, were collected during the period from 1975 to 1983. They were preliminarily identified as Aceratherium sp. nov. and Chilotherium sp. nov. (Qi, 1979, 1985). A further study of these fossils indicates that they represent a new species of Acerorhinus and a species of Shansirhinus, respectively. In this paper, terminology of rhinocerotid teeth mainly follows Antoine (2002, fig. 72), and that of lower teeth is according to Qiu and Wang (2007, fig. 7). IVPP Loc. and IVPP V are the lo鄄 cality and specimen prefixes of Institute of Vertebrate Paleontology and Paleoanthropology, Chi鄄 nese Academy of Sciences, respectively.

摘要: 描述了产自云南禄丰古猿化石地点的犀科化石禄丰无鼻角犀新种(Acerorhinus lufengensis sp. nov. )和林氏山西犀相似种(Shansirhinus cf. S. ringstroemi)。A. lufengensis 的个体较大;原尖不收缩或微弱收缩,次尖几乎不收缩,反前刺缺失或非常微弱;前臼齿前尖肋强壮;臼齿前刺短小,无内齿带,除M3 外无小刺;下前臼齿的下内脊呈横向;下门齿呈特别粗壮的獠牙状。从A. lufengensis 的一系列进步性状判断,它的时代至少不会早于M3 外脊和后脊分界明显的A. palaeosinensis,应相当于晚中新世的NMU10 或MN12,年龄约7 Ma。S. cf. S. ringstroemi 具有丰富的釉质褶皱、微弱的前尖肋、非常强大的前刺、强烈收缩的原尖、发达的齿桥和中窝、角状的U 形内谷、连续的内齿带、膨大成方形的次尖等。在这个种内,体型有增大的趋势,釉质褶皱向增强的方向发展,中窝数量增多,而禄丰标本在尺寸上略小于甘肃临夏的上新世最早期材料,釉质褶皱也相对更弱,中窝仅有一个。因此,禄丰S. cf. S. ringstroemi 的时代应该略早,出现于晚中新世的7 Ma 左右是比较合理的解释。