Neostlingoceras carcitanense Subzone: Difference between revisions
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|Porifera: ||''Stauronema carteri'' | |Porifera: ||''Stauronema carteri'' | ||
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Revision as of 15:37, 25 September 2013
Base: The base of the subzone is the base of the M. mantelli Zone.
Top: The top of the zone occurs in the interval immediately below the occurrence of common specimens of the ammonite Sharpeiceras spp. (Gale & Friedrich, 1989; Gale, 1995). Range of index species: Occurs in nominate subzone, and rare or absent in S. schlueteri Subzone (Gale & Friedrich, 1989).
Key Fauna:
| Porifera: | Stauronema carteri | |
| Brachiopoda: | Tropeothyris? carteri | |
| Bivalvia: | Aucellina spp. (locally common) | |
| Inoceramus anglicus | ||
| Ammonoidea: | Anisoceras spp. | |
| Idiohamites spp. | ||
| Mantelliceras mantelli | ||
| Neostlingoceras carcitanense | ||
| Sciponoceras spp. |
The occurrence of heteromorph ammonites (eg. Anisoceras spp., Idiohamites spp., Neostlingoceras spp. & Sciponoceras spp.) and the bivalve Aucellina is particulary characteristic of the N. carcitanense Subzone.
Faunal abundance & preservation: Typically a low diversity, phosphatised fauna. Bio-Markers: The bivalve Aucellina is common.
Age: Earliest Cenomanian