AVERIANOV & EFIMOV, 2018
Etymology: In reference to Simbirsk, the former name of Ulyanovsk city, European Russia.
Holotype: UPM 976/1-7
Locality: Slantsevy Rudnik, near Ulyanovsk city, Ulyanovsk Province, European Russia.
Age: Upper Hauterivian Stage, Upper Neocamian Subepoch, Middle Early Cretaceous, Early Cretaceous.
Material: Seven caudal vertebrae of a single individual.