GB3D Type Fossils

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Fossil specimen : SM J 3287 – Holotype

Taxonomic Group

Kingdom Animalia

  Phylum Mollusca

    Class Cephalopoda

      Order Ammonitida

Fossil Name Quenstedtoceras (Prorsiceras) gregarium (Leckenby)
Type Status Holotype
Name History

Quenstedtoceras (Prorsiceras) gregarium (Leckenby) – See Arkell, W.J. (1939c)

Prorsiceras gregarium (Bean-Leckenby) – See Buckman, S.S. (1918b): Holotype

Quenstedtoceras gregarium (Bean-Leckenby) – See Buckman (1913)

Ammonites gregarius Bean ms. – See Leckenby (1859)

Ammonites gregarius Bean ms.

Registration No. J 3287
Collector Name not available
Donor or Associated Person Name not available
Held By Sedgwick Museum of Earth Sciences Logo Sedgwick Museum of Earth Sciences
Country England
Locality Castle Rock (S. side), Scarborough, Yorkshire, England
Grid Reference Not available
Rock Unit Hackness Rock
Biozone gregarium
Geological Age

Callovian Age (Jurassic Period) (161.2 – 164.7 Ma B.P.)


Arkell, W.J. 1939 c. Quarterly Journal of the Geological Society of London vol. xcv (error for vol. xvc ??) p.170

Buckman 1913. Quarterly Journal of the Geological Society of London vol. lxix pp.153, 164

Buckman, S.S. 1918 b. Yorkshire type ammonites ii part xvii p. xiv no.117 pl. cxviia figs.1-3 no. i in table of proportions

Leckenby 1859. Quarterly Journal of the Geological Society of London vol. xv p.11

Available Images

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