mutabilis zone
United Kingdom and Ireland UK
Geological Time: Jurassic Upper Jurassic Kimmeridgian
Kimmeridge Clay Formation
the image is published in the source mentioned below
View of a specimen of Eoguttulina polygona (Terquem, 1864)
The identification is based upon:
, : Lloyd, A. J. (1962). Polymorphinid, Miliolid and Rotaliform Foraminifera from the Type Kimmeridgian. Micropaleontology. 8(3): 369-383. Plate , Fig.
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