Turrilites costatus
| Turrilites costatus Temporal range:
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| Turrilites costatus from Rouen, France, on display at Galerie de paléontologie et d'anatomie comparée, Paris | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Suborder: | †Ancyloceratina |
| Family: | †Turrilitidae |
| Genus: | †Turrilites |
| Species: | †T. costatus
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| Binomial name | |
| †Turrilites costatus Lamarck, 1801
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Turrilites (Turrilites) costatus is a species of helically coiled ammonoid cephalopod, from the lower part of the Upper Cretaceous (Cenomanian).
Description
The shell of this species can reach a length of about 11 centimetres (4.3 in). It is tightly wound in a high trochospiral, with an acute angle at the apex. Ribs are weak, with rows of strong tubercles.
References
- Arkell et al., Mesozoic Ammonoidea (L222); Treatise on Invertebrate Paleontology Part L, Ammonoidea. Geological Soc. of America and Univ Kansas Press.
- The Paleobiology Database Turrilites entry
- Ammonites