Fossil specimen : BGS GSM18150 – Holotype
| Taxonomic Group |
Kingdom Animalia Phylum Mollusca Class Cephalopoda Order Ammonitida |
|---|---|
| Fossil Name | Aulacostephanus (Aulacostephanus) fallax Ziegler |
| Type Status | Holotype |
| Name History | Aulacostephanus (Aulacostephanus) fallax Ziegler – See Ziegler (1962): Holotype Aulacostephanus sp nov aff anglicus evallidus Lamplugh, pars – See Arkell, WJ (1906) |
| Registration No. | GSM18150 |
|---|---|
| Collector | Danford Collection. 1906 |
| Donor or Associated Person | Danford, CG. 1906 |
| Held By |
 British Geological Survey
|
| Comments | Kimmeridge Clay - pseudomutabilis Zone. |
| Country | England |
|---|---|
| Locality | Speeton - North Yorkshire. |
| Grid Reference | Not available |
| Rock Unit | Kimmeridge Clay Formation |
|---|---|
| Biozone | Not available |
| Geological Age |
Kimmeridgian Age (Jurassic Period) (152.1 – 157.3 Ma B.P.) |
| References | Arkell, WJ. 1906-1908. Proc Yorks Geol Soc plXIV.,fig1 Arkell, WJ. 1933. Jurassic System plXXXIX.,fig3 Ziegler. 1962. Palaeontographica pl16.,fig4 |
|---|
Available Images
High resolution photographs
/BGS/P832907.JP2
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Steroscopic photographs
/BGS/P833420.JP2
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