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Fossil specimen : SM J 16492 – Holotype

Taxonomic Group

Kingdom Animalia

  Phylum Mollusca

    Class Cephalopoda

      Order Ammonitida

Fossil Name Clydoniceras thrapstonense Arkell
Type Status Holotype
Name History

Clydoniceras thrapstonense Arkell – See Arkell, W.J. (1951): Holotype

Clydoniceras discus (Sowerby J.)

Registration No. J 16492
Collector Name not available
Donor or Associated Person Keith, M.B.
Held By Sedgwick Museum of Earth Sciences Logo Sedgwick Museum of Earth Sciences, University of Cambridge
Country England
Locality Islip Iron Company's Quarry, Thrapston (1 mile W.), Northants, Islip (S.W.), Thrapston (S., road), Twywell (road), England
Grid Reference Not available
Rock Unit Lower Cornbrash
Biozone Not available
Geological Age

Callovian Age (Jurassic Period) – Bathonian Age (Jurassic Period) (163.5 – 168.3 Ma B.P.)


Arkell, W.J. 1951-1958. Monograph of the English Bathonian ammonites Palaeontographical Society Monographs p.40 pl. iii fig.12

Available Images

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2: /CAMSM/CAMSM_J.16492_01

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