Stratigraphy and geology of holotype locality of H. allocotus (HBV-20001) from the Upper Cretaceous of Shanxi, China, marked by ‘x’. Abbreviations: Ar, Archean Jining Group; holo, holotype of H. allocotus; KHl, lower member of Upper Cretaceous Huiquanpu Formation; KHu, upper member of Upper Cretaceous Huiquanpu Formation; Ng, Neogene (?Miocene) Hanruoba Formation; Q, Quaternary sediments; para, former paratype humerus of H. allocotus (see text); Pt, Proterozoic rocks.