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Fossil specimen : BGS Zu4457 – Neotype

Taxonomic Group

Kingdom Animalia

  Phylum Mollusca

    Class Cephalopoda

      Order Ammonitida

Fossil Name Hildoceras bifrons (Bruguiere)
Type Status Neotype
Name History

Hildoceras bifrons (Bruguiere): Neotype

Registration No. Zu4457
Collector Name not available
Donor or Associated Person Baldwin, SA. (July 1982) 1982
Held By British Geological Survey Logo British Geological Survey
Comments Upper Lias - Lower Toarcian [Whitbian] - bifrons zone. [Note: this is a Cast of Neotype possibly even Holotype]
Country England
Locality Whitby - N Yorks.
Grid Reference Not available
Rock Unit Lias Group
Biozone Bifrons
Geological Age

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


Original specimen fig'd by Bruguiere, JG. Histoire naturelle des Vers 1789. Pt of Enclyclopedie Methodique p.40

Original specimen fig'd by Buckman, SS. 1918. Yorkshire Tyupe Ammonites 114 A

Original specimen fig'd by Dean, WT, Donovan, DT & Howarth, MK. 1961. Bulletin BM (NH) Geol p.480-481 pl72.,figs4a,b

Original specimen fig'd by Lister, M. Historiae Animalium Angliae tres tractus 1678 p.205 pl6.,fig2

Available Images

High resolution photographs


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Steroscopic photographs


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