新疆准噶尔盆地北缘铁尔斯哈巴合晚渐新世两种啮形类耳区的形态研究

我们曾描述过一块与本文描述的标本产自同一地点和层位、可能为Ａｍｐｈｅｃｈｉｎｕｓ的猬类岩骨标本（孟津等，１９９９）。后来新发现的与牙齿属同一个体的Ａｍｐｈｅｃｈｉｎｕｓ岩骨标本证明我们根据单体岩骨的分类鉴定无误。此例说明，在一定的条件下，耳区标本在某些哺乳动物类群中可以鉴定到属，甚至种。因此在形态学、生物地层学上都有一定的意义，而且会因有关标本的不断积累而越来越重要。本文记述了另外两块产自新疆准噶尔盆地北缘铁尔斯哈巴合晚渐新世地层中的岩骨。有关地层、地点资料及所用术语见孟津等（１９９９）以及其中…

TWO PETROSALS OF GLIRIFORM MAMMALS FROM LATE OLIGOCENE OF TIEERSIHABAHE, XINJIANG UYGUR AUTONOMOUS REGION, CHINA

Two petrosals from the Late Oligocene of the northern Junggar Basin, Xinjiang Uygur Autonomous Region of China are described and are assigned to ?Yindirtemys and ?Sinolagomys or Desmatolagus based on sizes and morphologies. The unit formed by a fused bulla and petrosal, the spongy bullar wall and the anterior position of the entrance for the stapedial artery into the tympanic cavity indicate that petrosal A is most likely from an ochotonid. Absence of grooves and formina for the internal carotid artery around the promontorium suggests petrosal B probably belongs to the ctenodactylid Yindirtemys. If the identifications are confirmed, these specimens represent the first records of ear regions in the two taxa.