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本文首次系统报道了四川西昌地区侏罗纪和早白垩世介形类,共18属,46种,其中1新属(Monospinocythere),8新种,4未定种。这些介形类化石可以划分为5个组合。含Pinnocypridea-Minheella组合的飞天山组下段应属晚侏罗世;含Cypridea-Latonia组合的飞天山组上段应归入早白垩世,侏罗系与白垩系的界线在飞天山组上、下段之间。为川、滇两省红层的时代划分和地层对比,提供了较重要的古生物依据。
This paper reports for the first time systematically the Jurassic and Early Cretaceous ostracods in Xichang, Sichuan Province, including 18 genera and 46 species, including 1 Monospinocythere, 8 new species and 4 undetermined species. These ostracods can be divided into five groups. The Lower Member of the Feitian Formation that contains the Pinnocypridea-Minheella assemblage should belong to the Late Jurassic. The upper member of the Feituoshan Formation that contains the Cypridea-Latonia assemblage should be classified as Early Cretaceous. The Jurassic and Cretaceous boundary line is above and below the Feitian Mountain Formation between. For the Chuan, Yunnan provinces and the stratigraphic division of the red stratigraphic contrast, provide a more important paleontological basis.