Fig. 1From: Halysis Høeg, 1932 — an ancestral tabulate coral from the Ordos Basin, North Chinaa Schematic map of the study area (red rectangle), located in the northwest of the Ordos Basin, North China (modified after Zhu et al. 2012); b Location of the Middle Ordovician Laoshidan section (red star) (modified after Jing et al. 2016)Back to article page