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Vertebrata Palasiatica ›› 2004, Vol. 43 ›› Issue (01): 77-80.

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PARAKANN EMEYERIA CHENGI SP. NOV. FROM KELAMAYI FORMATION OF JIMUSAR, XINJIANG

LIU Jun   

  • Online:2004-03-15 Published:2004-03-15

新疆吉木萨尔克拉玛依组副肯氏兽一新种

刘俊   

Abstract: A new specimen (CAGS V 382) (Figs. 1~2) was described and a new species, Parakannemeyeria chengi, was erected based on this specimen. This material was found in the lower part of the Kelamayi Formation (Middle Triassic) of Jimusar, Xinjiang by Professor Cheng Zhengwu. It was identified as Parakannemeyeria by: skull curved, long, narrow and high; preorbital length more than 45 % of skull length ; the width between orbits less than 40 % of the skull length; occipital plate high and narrow. But it also has some characters used to be thought as the diagnosis of Sinokannemeyeria such as broad intertemporal region, reduced nasal middle ridge; these two characters are enough to distinguish this specimen from all other Parakannemeyeria. A cladistic analysis was done for the phylogenetic relationship of Parakannemeyeria chengi among all known species of Sinokannemeyeria, Parakannemeyeriaand Xiyukannemeyeria using the characters and data matrix of Liu and Li (2003) , only adding the character states of P. chengi (Table 1) . A shortest tree was obtained , it is nearly the same as the tree of Liu and Li (2003) , other than P. chengi is the sister group of P. shenmuensis. The autopomorphies of P. chengi are indistinct mid2nasal ridge, wide intertemporal region mainly formed by parietal (and interparietal), the posterior part of jugal arch nearly triangular in cross section.

摘要: 1963 年在新疆阜康曾经发现过肯氏兽的材料 ,这批化石中有被称为“九龙壁”的一群个体。这些化石曾被归入副肯氏兽属 ,命名为短吻副肯氏兽(Parakannemeyeria brevirostris)(孙艾玲 ,1978) 。最近依据这个种建立了一个新属 :西域肯氏兽 (Xiyukannemeyeria) ,于是新疆的肯氏兽与华北的肯氏兽就没有相同属了(刘俊、李锦玲 ,2003) 。最近又修理出了一个同样来自新疆克拉玛依组的肯氏兽头骨 ,经鉴定可以归入副肯氏兽属中 ,故重新确认了副肯氏兽属在新疆的存在。