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Fossil specimen : BGS GSM23949 – Holotype

Taxonomic Group

Kingdom Animalia

  Phylum Mollusca

    Class Cephalopoda

      Order Ammonitida

Fossil Name Pseudolioceras
Type Status Holotype
Name History

Pseudolioceras – See Howarth, MK (1962)

Hudlestonia simplex (Simpson) – See Simpson (1855): Holotype

Registration No. GSM23949
Collector Lycett, J.
Donor or Associated Person Name not available
Held By British Geological Survey Logo British Geological Survey
Country England
Locality Whitby - N Yorks.
Grid Reference Not available
Rock Unit Lias Group
Biozone Dispansum
Geological Age

Aalenian Age (Jurassic Period) – Rhaetian Age (Triassic Period) (170.3 – 209.5 Ma B.P.)


Described by Simpson. 1855. Fossils of the Yorkshire Lias. 1st Edition p.84

Described by Simpson. 1884. Fossils of the Yorkshire Lias. 2nd Edition p.120

Howarth, MK. 1962. Palaeontology p.122 pl18.,figs4a,b

Available Images

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Steroscopic photographs


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