Protowenella is a genus of helcionellid from the Middle Cambrian of Australia. It has a strongly spiralled, smooth shell with concentric ridges that have low relief. Other than its tighter coiling, it is very similar to Tichkaella.[1]
| Protowenella Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | †Helcionelloida |
| Order: | †Helcionelliformes |
| Superfamily: | †Helcionelloidea |
| Genus: | †Protowenella |
References
edit- ^ Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.; Conway Morris, S (eds.). The Early Evolution of Metazoa and the Significance of Problematic Taxa. Cambridge University Press. pp. 157–177. ISBN 978-0-521-40242-2.