First described by Norwood and Pratten in 1855, Shansiella carbonaria is a very common fossil gastropod. The species existed from 306.95 to 295 million years ago. The genus Shansiella, first described by Yin in 1932, existed from 360.7 until 254 million years ago. Originally the species was named Pleurotomaria carbonaria.
Update: The focus genus for identification has changed to Naticopsis. Research is still pending in an effort to better understand this genus. The research below supports information about Mourlonia and will be preserved later. This is an exciting post, as it starts to describe what may become a new species