Cretaceous and Palaeogene Ostracod Biostratigraphy in Xining and Minhe Basins of China

The age of the dinosaur-bearing Cretaceous sediments at Dashuiguo, Inner Mongolia, P.R. China based on charophytes, ostracods and palynomorphs

“…Based on statistical analysis of external features Geng (1979) stated that Lycopterocypris Mandelstam, 1956 is a junior synonym of Eucypris Vavra, 1891;Hou et al (2002) followed this point of view. However some Chinese authors disagree and retain the genus Lycopterocypris (e.g., Hao et al, 1983;Gou et al, 1986;Hao, 1988). In the absence of any observations of internal structural details that would confirm the synonymy, Lycopterocypris should be considered a valid genus.…”

“…Occurrence. First described from the middle part of the Dzun Bayn suite, Mongolia (Liubimova, 1956), L. infantilis is a common species in the lower Lower Cretaceous of northeastern and northwestern China (Hao, 1988). It has been reported from assemblage 1/3/5 of the Saihan Tal Formation, Eren Basin, Nei Mongol Autonomous Region (Gou et al, 1986), and from the lower part of the Hekou Formation, Xining and Minhe basins (Hao, 1988), the Fuxin, Yixian and Jiufutang formations, Fuxin Basin, Liaoning Province (Li and Liu, 1994;Su et al, 1985), the Dahuichang Formation, Fengtai and Chaoyang districts, Beijing (Pang and Whatley, 1990), the Lisangou and Guyang formations, Guyang County, Inner Mongolia (Pang and Whatley, 1990), the Xiazhuang Formation, Beijing (Pang and Whatley, 1990), and the Quantou Formation, Songliao Basin (Li and Liu, 1994).…”