Figure 2 . (Colour online) Geological background of the holotype locality of Euanthus. (a) Several localities of the Jiulongshan Formation in the western Liaoning. The bottom central one is the holotype locality of Euanthus. (b) Geological map of the region shown in panel (a). Note the position of the fossil locality (blue square). Reproduced and modified from attached map 1 of Liaoning Provincial Agency of Geology and Mineral Resources (1989). (c) Geological map of the region near the fossil locality (blue square). Note the position of the fossil locality (blue square). Enlarged from (b).