found in the Baylei/Cymodoce Ammonite Zone at
Black Head
sample 134
United Kingdom and Ireland UK
Geological Time: Jurassic Upper Jurassic Kimmeridgian
Kimmeridge Clay Formation
The raw material was collected together with Dr. Steve Etches and Chris Webb. Specimens were picked and photographed by
The identification is based upon:
, : Vanderpool, H. C. (1933). Upper Trinity Microfossils from Southern Oklahoma. Journal of Paleontology. 7: 406-411. Plate , Fig.