GB3D Type Fossils

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Fossil specimen : BGS GSM17540 – Lectotype

Taxonomic Group

Kingdom Animalia

  Phylum Mollusca

    Class Cephalopoda

      Order Ammonitida

Fossil Name Aegacrioceras bicarinatum (Young & Bird)
Type Status Lectotype
Name History

Aegacrioceras bicarinatum (Young & Bird)

Crioceras matheroni

Aegacrioceras subseeleyi Spath

Registration No. GSM17540
Collector Name not available
Donor or Associated Person Danford 1906
Held By British Geological Survey Logo British Geological Survey
Comments Hauterivian Speeton Series Zone Mid to high
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.)


Rawson PF. 1970. Journ Nat Hist p.587 3,4,5

Rawson PF. 1975. Bull Brit Mus Nat Hist (Geol) p.139 2 fig1

Spath. 1924. Geol Mag p.77

Available Images

High resolution photographs


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Steroscopic photographs


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