The Bashkirian (Late Carboniferous) ammonoid genus Bilinguites has a nearly global distribution in the tropical and subtropical zones and 25 species have been described up till now. Most of them are considered endemic, but some may have a wide geographic distribution. Our study on new and previously collected materials from North China (Gansu and Ningxia) shows that the stratigraphically youngest species of Bilinguites in North China and Western Europe are morphologically very similar, possibly indicating correspondence of the ammonoid faunas. Bilinguites scalpratus is revised and established as a stratigraphically important species of the genus in North China; it co-occurs with the first gastrioceratid species Cancelloceras pachygyrum. This occurrence can be correlated with the Western European co-occurrence of Cancelloceras cancellatum and Bilinguites superbilinguis at the base of the G₁ Zone.

Bashkirian（晚石炭纪）菊属Bilinguites在热带和亚热带地区几乎全球分布，迄今已描述25种。它们中的大多数被认为是地方性的，但有些可能具有广泛的地理分布。我们对来自华北（甘肃和宁夏）的新材料和以前收集的材料的研究表明，华北和西欧的双语种在地层上最年轻的物种在形态上非常相似，这可能表明了菊类动物群的对应关系。双语种被修订确定为华北地区重要地层种；它与第一个胃角动物Cancelloceras pachygyrum共同发生. 这种情况可能与西欧在 G ₁区底部同时出现Cancelloceras cancellatum和Bilinguites superilinguis 相关。