| Registration No. : |
GSM 18150 . |
Type : |
Holotype |
| Identifications : |
| New: |
Mollusca: Ammonoidea |
Aulacostephanus
(Aulacostephanus)
fallax Ziegler |
| Old: |
Mollusca: Ammonoidea |
Aulacostephanus sp nov aff anglicus (Steuer) evallidus Lamplugh, pars |
| Locality : |
Speeton - North Yorkshire. |
| Grid Reference : |
Available from curator
|
Country : |
England |
| 1:50K map : |
55 |
|
| Chronostratigraphy : |
Kimmeridgian Age
— Kimmeridgian Age
|
| Lithostratigraphy : |
KIMMERIDGE CLAY FORMATION |
| Collector / Donor : |
Available from curator
|
| References : |
| Arkell, WJ. 1933 Jurassic System |
| Ziegler 1962 Palaeontographica 119A |
| Arkell, WJ. 1906 1908 Proc Yorks Geol Soc. 16 |
