Protowenella Temporal range: | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Class: | † Hyolitha |
Order: | † Orthothecida |
Genus: | † Protowenella |
Protowenella is a genus of hyolith from the Middle Cambrian of Australia and Greenland, previously thought to be a helcionelloid. [1] It has a strongly spiralled, smooth shell with concentric ridges that have low relief. Other than its tighter coiling, it closely resembles Tichkaella . [2]