Journal of Micropalaeontology
Journal of Micropalaeontology
JM
Articles | Volume 37, issue 1
Articles | Volume 37, issue 1
https://doi.org/10.5194/jm-37-149-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-37-149-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 37, issue 1
Research article
 | 
11 Jan 2018
Research article |  | 11 Jan 2018

The occurrence of a shallow-water Ammobaculoides assemblage in the Middle Jurassic (Bajocian) Dhruma Formation of Central Saudi Arabia

Michael A. Kaminski, Muhammad Hammad Malik, and Eiichi Setoyama

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Short summary
We report the occurrence of a foraminiferal assemblage dominated by Ammobaculoides in the lowermost member of the Middle Jurassic Dhruma Formation exposed west of Riyadh, Saudi Arabia. The new species Ammobaculoides dhrumaensis n.sp. is described from the D1 unit (the Balum Member) of the Dhruma Formation, which has been assigned an early Bajocian age based on ammonites. Our new finding constitutes the oldest reported worldwide occurrence of the agglutinated foraminiferal genus Ammobaculoides.
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