Abstract
The mollusk species Watsonella crosbyi Grabau, 1900 was found among other mollusks in the Lower Botomian strata of the Xinji Formation on the Northern China Platform (Shaanxi Province). Taxonomically the mollusk assemblage is extremely similar to that from the Mernmerna Formation, Parara Limestone, and Sellick Hill Formation of Southern Australia, the Bastion Formation of Laurentia, and the uppermost Emyaksin Formation of the Siberian Platform. All these strata can be aged as Early Botomian. The new finding of Watsonella crosbyi confirms the significant time range of the species distribution (Tommotian–Botomian) and raises doubts about newly proposed correlations of the Lower Cambrian of Southern Australia making the previously determined age of the formations one or even two ages older.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
