新疆准噶尔盆地安集海河组的腹足类化石很丰富, 文中记述的Bulinidae (小泡螺科)是采获标本中的一部分, 标本采自准噶尔盆地西南缘奎屯河剖面的安集海河组中段, 有2属5种(含2新种): Sinoplanorbis sinensis (Odhner), Sinoplanorbis junggarensis sp. nov., Sinoplanorbis intermedia Yü et Pan, Hopeiella kuitunensis sp. nov., Hopeiella alticonica Youluo。Sinoplanorbis属和Hopeiella属是我国的本土属, 它们主要分布在山西、广西、江西、 河南、河北, 以及渤海沿岸地区的晚始新世和早渐新世地层中。上述已知种Sinoplanorbis sinensis (Odhner), Si noplanorbis intermedia Yü et Pan, Hopeiella alticonica Youluo 也产于渤海沿岸地区晚始新世—早渐新世的沙河街组四段上部和东营组。结合Sinoplanorbis和Hopeiella属的本土特点和主要分布界限, 以及已知种主要地层分布来看, 当前安集海河组中段的地质时代为晚始新世—早渐新世。

Gastropod fossils are abundant in the Anjihaihe Formation of the Junggar Basin, Xinjiang, northwestern China. In this study, five species were described belonging to the family Bulinidae. The specimens were collected from the mid dle member of the Anjihaihe Formation at the Kuitunhe section on the southwestern margin of the Junggar Basin. These five species, including two new species, belong to two genera of the family Bulinidae: Sinoplanorbis sinensis (Odhner), Sinoplanorbis junggarensis sp. nov., Sinoplanorbis intermedia Yü et Pan, Hopeiella kuitunensis sp. nov., and Hopeiella alticonica Youluo. Both genera, Sinoplanorbis and Hopeiella, are endemic to China and are mainly distributed in the up per Eocene to lower Oligocene strata in the provinces of Shanxi, Guangxi, Jiangxi, Henan, and Hebei, as well as in the coastal areas of the Bohai Sea. The known species Sinoplanorbis sinensis (Odhner), Sinoplanorbis intermedia Yü et Pan, and Hopeiella alticonica Youluo have also been reported from the upper part of the fourth member of the Shahejie For mation and the Dongying Formation (upper Eocene to lower Oligocene) along the coastal areas of the Bohai Sea. Based upon the geographical distribution and stratigraphic occurrence of Sinoplanorbis and Hopeiella, as well as the stratigraph ic range of these species, the geological age of the middle member of the Anjihaihe Formation is inferred to be late Eocene–early Oligocene.

现代古生物学和地层学国家重点实验室基础性研究专项(20102106)资助