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Geological Time: Cretaceous Lower Cretaceous
holotype
View of a specimen of Ammodiscus pleurotomarioides Chapman, 1894
The identification is based upon:
, : Chapman, F. (1894). The Bargate Beds of Surrey and Their Microscopic Contents. Quaterly Journal of the Geological Society of London. 50(4): 677-730. Plate , Fig.
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