Ammonite - Harpoceras
Ammonite - Harpoceras
3D
Published 2018-11-06T15:17:54+00:00
Assemblage of pyritized ammonites including Harpoceras falciferum. Found in Dorset.
Harpoceras is an extinct genus of cephalopod belonging to the family Hildoceratidae. These cephalopods existed in the Jurassic period, during Toarcian age from Falciferum zone to Commune subzone of Bifrons zone. They were fast-moving nektonic carnivores.
Shells of Harpocerasspecies show strong dimorphism in their size. While microconchs reach 24–51 mm in diameter, macroconchs shells width is 115–430 mm. They are moderately evolute to involute and compressed. Whorl sides are flat and there is strong keel. Ribs are falcoid or falcate and thus biconcave, strong and projected. Sometimes, ribs can be broad and flat topped on outer part of whorl and in some species they can be striate on inner part of whorl. Some species have midlateral groove, or series of undulating depressions on inner half of whorl
Imaged using an Artec spider scanner and processed using Artec studio 12. By M Partridge.
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This object is scanned by Fossils in Shropshire
| Date de publication | 06/11/2018 |
| Titre | Ammonite - Harpoceras |
| Date | circa 175 million years ago |
| Dimension | 22cm Width 21cm Depth 5cm. |
| Localisation | Fossils in Shropshire |
