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Fossil specimen : BGS GSM17930 – Holotype

Taxonomic Group

Kingdom Animalia

  Phylum Mollusca

    Class Cephalopoda

      Order Ammonitida

Fossil Name Simbirskites (Speetoniceras) subbipliciforme (Spath)
Type Status Holotype
Name History

Simbirskites (Speetoniceras) subbipliciforme (Spath)

Holcostephanus sp

Registration No. GSM17930
Collector Name not available
Donor or Associated Person Danford 1906
Held By British Geological Survey Logo British Geological Survey
Comments Speeton Clay zone D7 base
Country England
Locality Speeton - North Yorkshire.
Grid Reference Not available
Rock Unit Lower Cretaceous Rocks (Undifferentiated)
Biozone Not available
Geological Age

Early Cretaceous Epoch (Cretaceous Period) (100.5 – 145 Ma B.P.)


Danford CG. 1906. Proc Yorks Geol Soc XII fig 3 3a

Rawson PF. 1971. Bull Brit Mus Nat Hist Geology p.43 I fig 2

Spath. 1924. Geol Mag p.76

Available Images

High resolution photographs


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Steroscopic photographs


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3D Scans

1: /BGS/GSM_17930

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