Abstract: Xichuan Basin, located in the southwest of Henan Province, is an elongated basin with its longitudinal axis oriented in the northwest— southeast direction. The "red— beds " unconformably deposited on the Precambrian or Cambrian rocks are widely distributed in the basin, with a maximum thickness of over 1600m. In 1974, Upper Cretaceous dinosaur eggs were first discovered in these beds by the Twelfth Brigade, Bureau of Geology and Mineral Resources of Henan, and the egg—bearing beds were divided into three formations: Gaogou, Majiacun, and Sigou formations. After this discovery, the latter author surveyed the area, and collected two clutches of eggs and many eggshell fragments in 1975. Two years later, the Twelfth Geological Brigade collected many eggshell fragments from 9 localities (fig. l). In this paper, we characterize the dinosaur eggshell assemblages from 10 localities in the Xichuan Basin and discuss the ages of the egg—bearing beds.

摘要： 摘要记述了河南淅川盆地10个地点发现的恐龙蛋化石计6种，分属于4个科6个属。其中新属1个、新种2个。新属、新种滔河扁圆蛋(Placoolithus taohensis)以其特有的壳单元分枝特征成为树枝蛋科的新型分子;另一新种淅川树枝蛋(Dendroolithus xichuanensis)与湖北安陆王店树枝蛋(D. wandianensis)性质相似，两者时代应彼此相当;含滔河扁圆蛋的马家村组下部应与其下含淅川树枝蛋的高沟组划归同一时段为宜，即晚白垩世早期;含副圆形蛋、椭圆形蛋、长形蛋、南雄蛋的马家村组